--- title: Manufacturing process for Critical Automotive Components description: Single-pass applications Brake Cylinders, Anti-Lock Brakes, Power Steering Components, Transmission Gears, VCT Housing, Rotor and Rotor Sub-Assemblies --- [![Engis](https://www.engis.com/hs-fs/hubfs/Web%20Header.png?width=357&height=100&name=Web%20Header.png "Engis")](https://www.engis.com/homepage) ** [News](https://www.engis.com/press-and-news) [Articles](https://www.engis.com/knowledge-center)  [Careers](https://www.engis.com/careers) [Locations](https://www.engis.com/locations)   # Precision Finishing of Automotive Part Bores   [![Inquiries, Sales or Support ](https://no-cache.hubspot.com/cta/default/4228839/5626bc65-bd03-42c9-b559-8f57e72ed9a3.png)](https://cta-redirect.hubspot.com/cta/redirect/4228839/5626bc65-bd03-42c9-b559-8f57e72ed9a3) --- ![Diamond Struture](https://www.engis.com/hs-fs/hubfs/Diamond%20Struture.jpg?width=183&height=128&name=Diamond%20Struture.jpg)[**SURFACE ENGINEERING THROUGH DIAMOND EXPERTISE**](https://www.engis.com/engis-micron-diamond-and-cbn-powders)[--- ](https://www.engis.com/engis-micron-and-cbn-diamond-powders) ![Man with microscope](https://www.engis.com/hs-fs/hubfs/cta1.jpg?width=155&height=133&name=cta1.jpg)[******ADVANCED PROCESS DEVELOPMENT****** --- ](https://www.engis.com/p)![WEBBTELESCOPE 2](https://www.engis.com/hs-fs/hubfs/WEBBTELESCOPE%202.png?width=163&height=137&name=WEBBTELESCOPE%202.png)**[VISIT OUR KNOLWEDGE CENTER](https://www.engis.com/knowledge-center)** --- ![Tradeshow Schedule (1)](https://www.engis.com/hs-fs/hubfs/Tradeshow%20Schedule%20(1).png?width=147&height=118&name=Tradeshow%20Schedule%20(1).png) [**LEARN MORE** --- ](https://www.engis.com/events) ## ENGIS SOLUTIONS FOR AUTOMOTIVE COMPONENTS Engis works closely with Tier One and Tier Two manufacturers to improve quality and reduce costs on a wide variety of automotive parts. including critical components in braking, steering and transmission mechanisms. Engis single-pass bore finishing technology has brought significant quality and productivity improvements to the bores of these critical elements and can, in some applications, maintain tolerances up to 1µm in both the bore size and taper, 0.1μm in roundness and straightness and achieve finishes of 0.01 Ra under production conditions. | Some of our most successful single-pass applications include: - Brake Cylinders - Anti-Lock Brakes - Power Steering Components - Transmission Gears - VCT Housing, Rotor and Rotor Sub-Assemblies  See the Engis Solution for High-Volume Automotive Parts   | | | --- | --- | | The Engis Precision Honing Process Development Lab offers to prototype the process and finish your components so that you can evaluate the benefits of the Engis system first hand.   Furthermore, [Engis Electrogrip® grinding wheels](https://www.engis.com/electroplated-superabrasive-grinding-wheels) are utilized in a variety of grinding applications including finishing gear profiles and other precision transmission components. For[ lapping and polishing](https://www.engis.com/hyprez-lapping-polishing) of your critical automotive parts, we engineer a complete system that elevates both precision and performance at a reduced cost per piece.   | [ LEARN ABOUT ](https://www.engis.com/bore-honing-systems)[Engis Systems](https://www.engis.com/bore-honing-systems) [![Bore FInishing Collage](https://www.engis.com/hs-fs/hubfs/Bore%20FInishing%20Collage.jpg?width=303&height=310&name=Bore%20FInishing%20Collage.jpg)](https://www.engis.com/hubfs/Engis%20Bore%20Finishing%20Flyer.pdf)[*Download Bore Finishing Flyer*](https://www.engis.com/hubfs/Engis%20Bore%20Finishing%20Flyer.pdf)   | | **CASE STUDY - CONNECTING RODS** |   | | --- | --- | | Challenge:  - Inconsistent bore geometry - High down-time - High perishable tool cost **Engis Advantage:** - Improved quality: Cpk >2 - Improved bore roundness to better than 5um for the crank bore and 3um for pin bore - Improved "Bend and Twist" - Production Rate: 300 parts per hour - Total perishable tooling cost for finishing both bores is roughly $0.03. - Quick change-over between part types - Pin and crank bores finished together in the same machine | **Material:  Crank Bore** **Forged Steel / Pin Bore - Bronze Bushing ** | | ![Bore Finishing -Connecting Rods](https://www.engis.com/hs-fs/hubfs/Bore%20Finishing%20-Connecting%20Rods.jpg?width=384&height=318&name=Bore%20Finishing%20-Connecting%20Rods.jpg)   | | |   |   | | **CASE STUDY - TURBO CHARGER BEARINGS** |   | | Challenge:  - Inconsistent bore geometry - High down-time - High perishable tool cost - Slow change-over - Unable to achieve required surface finish ** Engis Advantage:** - Improved bore size - Quick change-over between part types - Little to no down-time - Production Rate: 300 parts per hours - Tool cost <$0.01 per finished part | **Material:  ****Bronze ** | | ![Bore Finishing -Tubo Charger Bearings (1)-1](https://www.engis.com/hs-fs/hubfs/Bore%20Finishing%20-Tubo%20Charger%20Bearings%20(1)-1.jpg?width=380&height=335&name=Bore%20Finishing%20-Tubo%20Charger%20Bearings%20(1)-1.jpg)   | | |   |   | | **CASE STUDY - TURBO CHARGER CENTER HOUSING** |   | | Challenge:  - Inconsistent bore geometry - High down-time - High perishable tool cost - Slow change-over | **Engis Advantage:** - Improved bore size: Cpk:>2 - Improved bore parallelism - Quick change-over between parts types - Production Rate: 180 parts per hour - Reduced tool cost to less than $0.01 per finished part |   [![Contact Us-2](https://www.engis.com/hs-fs/hubfs/Contact%20Us-2.jpg?width=222&height=46&name=Contact%20Us-2.jpg)](https://www.engis.com/contact)   [About Engis](https://www.engis.com/about-engis) [News & Press](https://www.engis.com/press-and-news) [Careers](https://www.engis.com/careers) [Locations](https://www.engis.com/locations) [Catalogs & Media](https://www.engis.com/catalogs-media) [Events](https://www.engis.com/events) [Contact Us](https://www.engis.com/contact) ![ISO 9001 Certified Quality Management System - White](https://www.engis.com/hs-fs/hubfs/ISO%209001%20Certified%20Quality%20Management%20System%20-%20White.png?width=109&height=43&name=ISO%209001%20Certified%20Quality%20Management%20System%20-%20White.png) 105 West Hintz Road, Wheeling, IL 60090 [Call: 847-808-9400](tel:+1-847-808-9400) Fax: +1-847-808-9430 ©2026 Engis Corporation. All Rights Reserved. Engis® is a registered trademark of Engis Corporation, USA and other countries. All products denoted with ® or ™ are registered trademarks or trademarks of Engis Corporation. 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