Jump to content

  • Welcome to Auto Parts Forum

    Whether you are a veteran automotive parts guru or just someone looking for some quick auto parts advice, register today and start a new topic in our forum. Registration is free and you can even sign up with social network platforms such as Facebook, Twitter, Google, and LinkedIn. 


Machining is very popular to be used in auto parts

Jerry Zhang

Recommended Posts

CNC lathe machining is a procedure for change the workpiece’s dimensions. There are two categories according to the difference of processing method, One is CNC lathe machining, the other is press working.


What is CNC lathe machining

1. CNC lathe machining definition

CNC lathe machining is a procedure for change the workpiece’s dimensions. There are two categories according to the difference of processing method, One is CNC lathe machining, the other is press working.


CNC lathe machining Function: Change the workpiece’s dimensions


CNC lathe machining, Press working Technics Process: Casting, Forging, Stamping, welding

2. Catalog:

(1) Fundamental process

(1.1) Productive Process
(1.2) Productive Category
(1.3) Process Planning

(2) The instruction for benchmark

(2.1) Definition
(2.2) Category

(3) CNC lathe machining Processing Cushion

(4) Scope of application

(5) Types of equipment

(6) China CNC lathe machining manufacturers

3. CNC lathe machining fundamental process

(i) Productive Process

Types of equipment productive processes are the process for making the products from raw material (unfinished blanks).
Types of equipment productive process include raw material transit and storage,
CNC lathe machining production preparing, unfinished blank making,
Precision parts’ CNC lathe machining and heat treatment, precision parts’ assembling, test, painting, and package, etc.

Technics process

In the productive process, there is a technical process.
Technics process is the process to change the workpiece’s shape, dimensions, positions, and character, etc, and make the workpiece to finished precision parts or unfinished blanks.
Technics process is a key part of the productive process.
Technics process includes casting, forging, stamping, welding, CNC lathe machining, assembling, etc.
Types of equipment production technics process include precision parts’ equipment production technics process and types of equipment assembling technics process.

Auxiliary processes

Others are auxiliary processes, for example, transit, storage, power supply, equipment repair, etc.
Technics process also consists of one or several tactic processes, one process consists of several steps.
A process is an elementary unit for types of equipment production technics process.

Process definition

Process definition is the technics process, that one worker (several workers) finish production continuously on one machine (or one position) for the same workpiece (or several workpieces).
The main characteristic of the process is that it doesn’t change the workpiece, types of equipment, or operator, and continuously.
The step is based on the same CNC lathe machining surface, the same CNC lathe machining tools and the same volume of feed
The Feed is a working process, which is a step for production finish on the workpiece’s surface by tools.

Technics flow

When making the types of equipment’s technics process, you have to make sure how many steps the workpiece needs and the sequence.
Technics flow is a simple process of key processes and sequences.
Technics flow is very important for making technics process,
Its function is to select the correct processing method for each surface, make sure the sequence of each surface, and the number of processes.

(ii) Productive Category

Productive Categories are usually divided into three categories,

a. Single workpiece production:

Manufacture different structures’ and dimensions’ workpiece separately, and seldom repeat.

b. Batch production:

Manufacture the same structure and dimensions’ workpiece among one year, there is some repeatability in the manufacturing process.

c. Mass production:

The quantity is huge, manufacture the same process in the same place.

(iii) Process planning

Planning principle

1. Every technological procedure is planned to make sure the quality of precision parts (types of equipment assembling), And reaches all the specifications as the drawing requests.
2. The technological procedure should have high productivity, The products made by technological procedures should be launched as fast as possible.
3. Try our best to decrease the production cost
4. Pay attention to reduce the intensity of labor to ensure production safety.

Raw data

1.Assembling drawing, precision parts drawings
2.Inspection quality standard
3.Yearly production program
4.Conditions of manufacture, including types of equipment and specification, performance and current status, workers’ technological level, power and water supply, etc.
5.Process planning, manual, and standard.
6.Advanced manufacture data


1. Analysis product’s assembling drawing and precision parts’drawings.
2. Confirm the blank
3. Make technics flow and ensure the position reference surface
4. Prepare the types of equipment according to each preocess
5. Prepare the blades, jigs, measuring implement, and auxiliary tools
6. Ensure the specification and inspection method for each process
7. Ensure the allowance for CNC lathe machining, calculate the size and tolerance
8. Ensure the cutting parameters
9. Ensure the production time

4. The instruction for benchmark of CNC lathe machining

(i) Definition

Precision part consists of several surfaces,
When analyzing the relative relation of the surfaces, you must confirm a benchmark.
Benchmark is a dot, line, and surface to confirm the part’s dot, line, and surface.
According to the different functions of the benchmarks, there two categories,
One is the design benchmark, the other is the technical benchmark.

(ii) Category

1. Design benchmark:

The benchmark to confirm the dots, lines, and surfaces on the drawings

2. Technics benchmark:

The benchmark for production and assembling.

3. Assembling benchmark:

The benchmark for confirming the parts’ position in the products when assembling

4. Measure benchmark:

The benchmark for inspecting the sizes and position

5. Locate benchmark:

The benchmark for CNC lathe machining.

5. CNC lathe machining Processing Cushion


When the blank is made to finish the product, you will be machining out the metal layer,
The total of the metal layer is called the total processing cushion.
The metal layer of every process is called process cushion.
As to the circle and hole, the processing cushion is on the diameter, called symmetry cushion.


The reason, why the workpiece has the processing cushion, is to CNC lathe machining out the tolerance or defect on the workpiece from the last process, for example,
The cold layer of casting parts, bubble hole of casting parts, the sand layer of casting parts.Oxide skin of forging parts, surface crack of forging parts, decarburized layer of forging parts.
The surface roughness of CNC lathe machining, etc.


The processing cushion can increase the precision and roughness of workpieces.
The volume of processing cushion will affect the product quality and production efficiency.
If the processing cushion is too big, it will increase the CNC lathe machining sum of labor,
Decrease the production efficiency, increase the loss for raw material, tools and power,
And increase the production cost.


If the processing cushion is too small, the tolerances and defects from the last process cannot be removed, 
The tolerances for loading and unloading cannot be removed too.
The principle is selecting the smallest processing cushion based on high quality.

Scope of application

1. Different metal parts CNC lathe machining
2. Fabrication, box structure, metal structure
3. Titanium, high-temperature alloy, nonmetal CNC lathe machining
4. Design and manufacture of wind tunnel combustion chamber
5. Design and manufacture of non-standard types of equipment
6. Design and manufacture of molds

Types of equipment

CNC mill
CNC grinding machine
CNC machine
CNC center

Laser welding

Electric discharge machining (EDM)
Universal grinder
Cylindrical grinder
Internal grinder
Precision lathe

China CNC lathe machining manufacturers

3 Levels of manufacturers in China

During the development of more than 50 years, there are 3 levels of manufacturers in China,
10% is a top-quality manufacturer, 20% middle quality manufacturer, and 70% low quality & cheap price manufacturer.

The global markets

At present, many markets are growing all over the world, such as Poland, Czech, Turkey in Europe, Thailand, Vietnam, the Philippines, India in Asian, Brazil in South America.
Compared to these new growing markets, China has many advantages based on high quality.

China CNC lathe machining market developing

In the past, everybody think made in China is for cheap and low quality,
It’s because China doesn’t have high precision types of equipment and skilled workers,
It looks like these new growing markets very much.
But now, 10% top quality manufacturer is fully changed,
Their core advantage is high quality, they compete with European and North American famous factories.

Introduction of Sinster

Ningbo Sinster Machine Co., Ltd is one of 10% top quality manufacturer,
You have no risk to cooperate with Sinster,
As many famous brands already choose Sinster and cooperate for long-term,
Such as Supernova, Pelican, ELKA, Cal-van Tools, Firepro, Tecflo, SEB, Keyence, MAUL, RTS, etc.
You can visit the website at 

link hidden, please login to view
 to find more information,
Don’t forget to send inquiry to [email protected]

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Content

  • Similar Topics

    • By OReilly Auto Parts
      Vice Grip Vocabulators w/ Derek Bieri | O'Reilly Auto Parts
    • By NAPA
      link hidden, please login to view
    • By Auto Musketeers
      link hidden, please login to viewis a premier automotive company that specializes in providing high-quality parts, and accessories to customers all over the world. Our mission is to provide our customers with exceptional products and services that exceed their expectations and contribute to their overall satisfaction. With years of experience in the automotive industry, we have developed a reputation for excellence and reliability. We offer a wide range of products, replacement parts, and accessories from top manufacturers. Our team of knowledgeable and experienced professionals is always available to provide expert advice and answer any questions you may have.
      At Auto Musketeers, we are committed to providing our customers with a hassle-free shopping experience. We understand that purchasing parts can be a significant investment, and we strive to make the process as smooth and enjoyable as possible. We offer competitive pricing, and a free 30-day return policy to ensure that our customers are completely satisfied with their purchases.
      Thank you for choosing
      link hidden, please login to viewfor your automotive needs. We are dedicated to providing you with the highest level of service and support, and we look forward to working with you.
    • By Partsguy23
      Why would a parts person who works at Advance have to call another parts place like WorldPac to look up a part? . Do they not know what they are doing? Just knowing what a car is just not good enough to be a parts person. It's a joke and sad. They have no clue.
    • eManualonline.com - Save 5% OFF on orders Over $50, Use Code Blaze. Ends 12/31/22.
    • By Advance Auto Parts
      Q1 Net Sales Increased 1.3% to $3.4 Billion; Comparable Store Sales Decreased 0.4%
      Operating Income of $90.0 Million; Operating Income Margin of 2.6%
      RALEIGH, N.C.--(BUSINESS WIRE)-- Advance Auto Parts, Inc. (NYSE: AAP), a leading automotive aftermarket parts provider in North America, that serves both professional installer and do-it-yourself customers, announced its financial results for the first quarter ended April 22, 2023.
      Tom Greco, president and chief executive officer, said, “I want to thank our Advance team members and independent partners for their continued hard work and focus on serving our customers. While we anticipated the first quarter would be challenging, our results were below our expectations. Net sales grew 1.3% in the quarter. Our operating margin rate of 2.6% in the quarter was well below expectations due to higher than planned investments to narrow competitive price gaps in the professional sales channel as well as unfavorable product mix.”
      Mr. Greco continued, “We remain focused on improving inventory availability while sustaining competitive price targets to improve topline sales. We expect the competitive dynamics we faced in the first quarter to continue, resulting in a shortfall to our 2023 expectations. We have reduced our full-year guidance and our board of directors made the difficult decision to reduce our quarterly dividend. In addition, in connection with my pending retirement, our board’s independent chair, Gene Lee, has assumed an expanded role as interim executive chair. Gene will be providing additional operational oversight and support to our management team to enable a seamless CEO transition. He has helped me immensely during my time as CEO and I look forward to working with him to improve the trajectory of our business in the months ahead.”
      First Quarter 2023 Results ( 1)
      First quarter of 2023 Net sales totaled $3.4 billion, a 1.3% increase compared with the first quarter of the prior year, primarily driven by new store openings. This was partially offset by a decline of comparable store sales of 0.4%.
      Gross profit decreased 2.4% to $1.5 billion. Gross profit margin of 43.0% of Net sales decreased 162 basis points compared with the first quarter of the prior year. This was primarily driven by inflationary product costs that were not fully covered by pricing actions. In addition, unfavorable product mix and supply chain headwinds also contributed to gross margin deleverage in the quarter.
      SG&A expenses were $1.4 billion, which was 40.4% of Net sales compared with 38.6% in the first quarter of 2022. This was primarily driven by inflation in labor and benefit-related expenses as well as costs associated with new store openings. This was partially offset by a decrease in startup costs related to the company's California expansion.
      The company's Operating income was $90.0 million or 2.6% of Net sales, compared with 6.0% in the first quarter of 2022.
      The company's effective tax rate was 28.4%, compared with 23.7% in the first quarter of 2022. The higher effective income tax rate reflects the impact associated with share based compensation. The company's Diluted EPS was $0.72, compared with $2.26 in the first quarter of 2022.
      Net cash used in operating activities was $378.9 million through the first quarter of 2023 versus $54.9 million used in operating activities in the same period of the prior year. The increase was primarily driven by lower Net income and an increase in cash used in working capital, primarily in accounts payable. Free cash flow through the first quarter of 2023 was an outflow of $468.9 million compared with an outflow of $169.8 million in the same period of the prior year.
      (1) All comparisons are based on the same time period in the prior year. Comparable store sales include locations open for 13 complete accounting periods and excludes sales to independently owned Carquest locations.
      Capital Allocation
      On May 30, 2023, the company declared a cash dividend of $0.25 per share to be paid on July 28, 2023 to all common stockholders of record as of July 14, 2023.
      Full Year 2023 Guidance
      Jeff Shepherd, executive vice president and chief financial officer, commented, “Given the shortfall experienced this quarter, along with our revised outlook for the balance of the year, we are reducing our full-year 2023 guidance. In addition, our board of directors made the decision to reduce our quarterly cash dividend to provide enhanced financial flexibility. We are committed to improving our operational performance and driving increased profitability."
      Prior FY 2023 Outlook
      Updated FY 2023 Outlook
      As of February 28, 2023
      As of May 31, 2023
      ($ in millions, except per share data)
      Net sales
      Comparable store sales (1)
      Operating income margin
      Income tax rate
      Diluted EPS
      Capital expenditures
      Free cash flow (2)
      Minimum $400
      New store and branch openings
        Comparable store sales include locations open for 13 complete accounting periods and excludes sales to independently owned Carquest locations.
        Free cash flow is a non-GAAP measure. For a better understanding of the company's non-GAAP adjustments, refer to the reconciliation of non-GAAP financial measures in the accompanying financial tables included herein.
      Investor Conference Call
      The company will detail its results for the first quarter ended April 22, 2023 via a webcast scheduled to begin at 8 a.m. Eastern Time on Wednesday, May 31, 2023. The webcast will be accessible via the Investor Relations page of the company's website (
      link hidden, please login to view). To join by phone, please 
      link hidden, please login to view for dial-in and passcode information. Upon registering, participants will receive a confirmation with call details and a registrant ID. While registration is open through the live call, the company suggests registering a day in advance or at minimum 10 minutes before the start of the call. A replay of the conference call will be available on the company's Investor Relations website for one year. About Advance Auto Parts
      Advance Auto Parts, Inc. is a leading automotive aftermarket parts provider that serves both professional installer and do-it-yourself customers. As of April 22, 2023 Advance operated 4,778 stores and 318 Worldpac branches primarily within the United States, with additional locations in Canada, Puerto Rico and the U.S. Virgin Islands. The company also served 1,315 independently owned Carquest branded stores across these locations in addition to Mexico and various Caribbean islands. Additional information about Advance, including employment opportunities, customer services, and online shopping for parts, accessories and other offerings can be found at 
      link hidden, please login to view. Forward-Looking Statements
      Certain statements herein are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are usually identifiable by words such as “anticipate,” “believe,” “could,” “estimate,” “expect,” “forecast,” “guidance,” “intend,” “likely,” “may,” “plan,” “position,” “possible,” “potential,” “probable,” “project,” “should,” “strategy,” “will,” or similar language. All statements other than statements of historical fact are forward-looking statements, including, but not limited to, statements about our strategic initiatives, operational plans and objectives, expectations for economic conditions and recovery and future business and financial performance, as well as statements regarding underlying assumptions related thereto. Forward-looking statements reflect our views based on historical results, current information and assumptions related to future developments. Except as may be required by law, we undertake no obligation to update any forward-looking statements made herein. Forward-looking statements are subject to a number of risks and uncertainties that could cause actual results to differ materially from those projected or implied by the forward-looking statements. They include, among others, factors related to the company’s leadership transition, the timing and implementation of strategic initiatives, including with respect to labor shortages or disruptions and the impact on our ability to complete store openings, deterioration of general macroeconomic conditions, the highly competitive nature of our industry, demand for our products and services, complexities in our inventory and supply chain and challenges with transforming and growing our business. Please refer to “
      link hidden, please login to view” of our most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”), as updated by our subsequent filings with the SEC, for a description of these and other risks and uncertainties that could cause actual results to differ materially from those projected or implied by the forward-looking statements. Advance Auto Parts, Inc. and Subsidiaries
      Condensed Consolidated Balance Sheets
      (In thousands) (unaudited)
      April 22, 2023(1)
      December 31, 2022(2)
      Current assets:
      Cash and cash equivalents
      Receivables, net
      Inventories, net
      Other current assets
      Total current assets
      Property and equipment, net
      Operating lease right-of-use assets
      Other intangible assets, net
      Other assets
      Total assets
      Liabilities and Stockholders' Equity
      Current liabilities:
      Accounts payable
      Accrued expenses
      Current portion of long-term debt
      Other current liabilities
      Total current liabilities
      Long-term debt
      Noncurrent operating lease liabilities
      Deferred income taxes
      Other long-term liabilities
      Total stockholders' equity
      Total liabilities and stockholders’ equity
      (1)   This preliminary condensed consolidated balance sheet has been prepared on a basis consistent with the company's previously prepared consolidated balance sheets filed with the Securities and Exchange Commission (“SEC”), but does not include the footnotes required by accounting principles generally accepted in the United States of America (“GAAP”).
      (2)   The balance sheet at December 31, 2022 has been derived from the audited consolidated financial statements at that date, but does not include the footnotes required by GAAP.
      Advance Auto Parts, Inc. and Subsidiaries
      Condensed Consolidated Statements of Operations
      (In thousands, except per share data) (unaudited)
      Sixteen Weeks Ended
      April 22, 2023(1)
      April 23, 2022(1)
      Net sales
      Cost of sales, including purchasing and warehousing costs
      Gross profit
      Selling, general and administrative expenses (2)
      Operating income
      Other, net:
      Interest expense
      Loss on early redemptions of senior unsecured notes

      Other (expense) income, net
      Total other, net
      Income before provision for income taxes
      Provision for income taxes
      Net income
      Basic earnings per common share
      Weighted-average common shares outstanding
      Diluted earnings per common share
      Weighted-average common shares outstanding
      (1)   These preliminary condensed consolidated statements of operations have been prepared on a basis consistent with the company's previously prepared consolidated statements of operations filed with the SEC, but do not include the footnotes required by GAAP.
      (2)   The sixteen weeks ended April 22, 2023 included an out-of-period charge of approximately $17 million related to costs incurred in prior years but not expensed in the corresponding periods. The company determined the cumulative impact was not material to the current period or any previously issued financial statements.
      Advance Auto Parts, Inc. and Subsidiaries
      Condensed Consolidated Statements of Cash Flows
      (In thousands) (unaudited)
      Sixteen Weeks Ended
      April 22, 2023(1)
      April 23, 2022(1)
      Cash flows from operating activities:
      Net income
      Adjustments to reconcile net income to net cash used in operating activities:
      Depreciation and amortization
      Share-based compensation
      Loss on property and equipment, net
      Loss on early redemptions of senior unsecured notes

      Provision for deferred income taxes
      Other, net
      Net change in:
      Receivables, net
      Inventories, net
      Accounts payable
      Accrued expenses
      Other assets and liabilities, net
      Net cash used in operating activities
      Cash flows from investing activities:
      Purchases of property and equipment
      Proceeds from sales of property and equipment
      Net cash used in investing activities
      Cash flows from financing activities:
      Borrowings under credit facilities
      Payments on credit facilities
      Borrowings on senior unsecured notes
      Payments on senior unsecured notes

      Dividends paid
      Repurchases of common stock
      Other, net
      Net cash provided by (used in) financing activities
      Effect of exchange rate changes on cash
      Net decrease in cash and cash equivalents
      Cash and cash equivalents, beginning of period
      Cash and cash equivalents, end of period
      (1)   These preliminary condensed consolidated statements of cash flows have been prepared on a consistent basis with the company's previously prepared statements of cash flows filed with the SEC, but do not include the footnotes required by GAAP.
      Reconciliation of Non-GAAP Financial Measure
      The company's financial results include certain financial measures not derived in accordance with accounting principles generally accepted in the United States of America (“GAAP”). Management uses Free cash flow as a measure of its liquidity and believes it is a useful indicator to investors or potential investors of the company's ability to implement growth strategies and service debt. Free cash flow is a non-GAAP measure and should be considered in addition to, but not as a substitute for, information contained in the company's condensed consolidated statement of cash flows as a measure of liquidity.
      Reconciliation of Free Cash Flow:
      Sixteen Weeks Ended
      (in thousands)
      April 22, 2023
      April 23, 2022
      Cash flows used in operating activities
      Purchases of property and equipment
      Free cash flow
      Adjusted Debt to EBITDAR: (1)
      Four Quarters Ended
      (In thousands, except adjusted debt to EBITDAR ratio)
      April 22, 2023
      December 31, 2022
      Total GAAP debt
      Add: Operating lease liabilities
      Adjusted debt
      GAAP Net income
      Depreciation and amortization
      Provision for income taxes
      Interest expense
      Share-based compensation
      Other expense, net
      Rent expense
      Adjusted Debt to EBITDAR
        Beginning in first quarter 2023, the company no longer excludes transformation-related activities in non-GAAP measures. Prior period has been recast to conform to current year presentation.
      NOTE: Management believes its Adjusted Debt to EBITDAR ratio (“leverage ratio”) is a key financial metric for debt securities, as reviewed by rating agencies, and believes its debt levels are best analyzed using this measure. The company’s goal is to maintain an investment grade rating. The company's credit rating directly impacts the interest rates on borrowings under its existing credit facility and could impact the company's ability to obtain additional funding. If the company was unable to maintain its investment grade rating this could negatively impact future performance and limit growth opportunities. Similar measures are utilized in the calculation of the financial covenants and ratios contained in the company's financing arrangements. The leverage ratio calculated by the company is a non-GAAP measure and should not be considered a substitute for debt to net earnings, net earnings or debt as determined in accordance with GAAP. The company adjusts the calculation to remove rent expense and to add back the company’s existing operating lease liabilities related to their right-of-use assets to provide a more meaningful comparison with the company’s peers and to account for differences in debt structures and leasing arrangements. The company’s calculation of its leverage ratio might not be calculated in the same manner as, and thus might not be comparable to, similarly titled measures by other companies.
      Store Information
      During the sixteen weeks ended April 22, 2023, 21 stores and branches were opened and 11 were closed or consolidated, resulting in a total of 5,096 stores and branches as of April 22, 2023, compared with a total of 5,086 stores and branches as of December 31, 2022.
      The below table summarizes the changes in the number of company-operated store and branch locations during the sixteen weeks ended April 22, 2023:
      WORLDPAC (1)
      December 31, 2022














      April 22, 2023
        Certain converted Autopart International ("AI") locations will remain branded as AI going forward.

      View source version on  link hidden, please login to view:  link hidden, please login to view
      Investor Relations Contact:
      Elisabeth Eisleben
      T: (919) 227-5466
      E: [email protected]
      Media Contact:
      Darryl Carr
      T: (984) 389-7207
      E: [email protected]
      Source: Advance Auto Parts, Inc.

      link hidden, please login to view

  • Create New...