Website Logo - CUMI Abrasives
Website Logo - CUMI Abrasives
Contact Us
Centerless Grinding Bearing Ring - CUMI Abrasives

Centerless Grinding – Bearing Ring

Good

Bearing Ring is an application that presents the most daunting challenges to any abrasive manufac­turer. The range of requirements and priorities of this application varies from product to product, which calls for an equally wide range of offerings to suit the same. Since in most of the centerless applications, more than one wheel is mounted on the spindle, extremely tight tolerances need to be maintained in the geometry and densities of the wheels to ensure uniform wear patterns even if each wheel in the set is different. CUMI has the expertise when it comes to centerless applications thanks to the advanced manufacturing process, premium abrasive grains, and specially designed vitrified, resin, and rubber bond systems to suit the application needs. Customized solu­tions are provided for every application and specific requirement. Be it through-feed, end-feed, or in-feed, CUMI wheels ensure that components are finished to stringent quality requirements.
Call to action icon
Brand: CUMI

Information Material:

Product Catalogue
Type Operation Speed Good Better Best
Outer Diameter
(TRB, SRB, CRB) 		Rough & Finish 35 A463 L5 V10C - -
50 A463 L5 V10C/50
A80 K5 V10C/50 		DA54 I6 TDV876/50
DA80 I6 TDV876/50 		55A54 I7 VC500/50
55A80 I7 VC500/50
Outer Diameter
(Ball Bearing)

610 x 610 x 304.8
508 x 610 x 304.8
610 x 508 x 304.8 		Roughing & Finishing 50 DA60 I6 TDV876 1CUMISA461 J6 VCAE/50 53MA461 J7 VC500/50
DA80 I6 TDV876 1CUMISA541 J6 VCAE/50 53MA541 J7 VC500/50
- 1CUMISA601 J6 VCAE/50 53MA601 J7 VC500/50
- 1CUMISA801 I6 VCAE/50 53MA801 J7 VC500/50
Roughing & Finishing 63 - 1CUMISA461 J6 VCAE/63 53MA461 J7 VC500/63
- 1CUMISA541 J6 VCAE/63 53MA541 J7 VC500/63
- 1CUMISA601 J6 VCAE/63 53MA601 J7 VC500/63
- 1CUMISA801 I6 VCAE/63 53MA801 J7 VC500/63
Outer Diameter
(Railway Bearing)

610 x 864 x 304.8 		Roughing & Finishing 35 - - RAA60 J+4 V2016
- - RAA80 J+4 V2016
- - RAA100 I+4 V2016
CUMI Code Grit Range Diameter Thickness Hardness Structure Speed
(mm) (Inch) (mm) (Inch) (mps)
CUMISA 46 - 120 350 - 610 14 - 24 100 - 250 4 - 10 I - N 6 & 8 35, 50 & 63
50A / 50MA 46 - 120 I - N 7 35 & 50
65A 80 - 220 L - 40
SA 46 - 120 I - N 5 - 7 35 & 50
9A 46 - 120 I - P 5 - 7 35 & 50
SBA 46 - 120 I - P 5 - 7 35 & 50
AA 46 - 120 I - P 5 - 7 35 & 50
DA 46 - 120 100 - 300 4 - 12 I - P 5 - 7 35 & 50
A 46 - 120 I - P 5 - 7 35 & 50
C 46 - 120 I - N 5 - 7 35 & 50
GC 46 - 120 I - N 5 - 7 35 & 50

Product Uses

Industries
Bearing
Applications
Ring Outer RaceCentreless
Product Description

Centerless grinding for bearing rings demands exceptional OD roundness, parallelism, and surface finish—parameters that directly influence friction, noise, and bearing life. CUMI Centerless Grinding Wheels are engineered for high-volume ring production, supporting long dressing intervals, burn-free cutting, and consistent wheel wear across multi-spindle configurations.

 Feature → Advantage → Benefit

  • Multi-bond engineered system (vitrified, resin, rubber) → optimized cutting profile → prevents thermal burn & microstructural damage
  • Precision geometry & density control → uniform wear across wheels → eliminates taper and OD variation in rings
  • High-performance abrasive grains → fast stock removal → reduced cycle time & lower energy load
  • Through-feed, end-feed & in-feed compatible → machine-agnostic flexibility → higher uptime & lower changeover effort
  • Custom hardness/porosity per ring size → tailored cutting response → lowers CPC (cost-per-component) in mass bearing production

Industry: Bearing Industry – OD grinding of inner & outer bearing rings

FAQs
01.
Which industry mainly uses these wheels? They are designed specifically for the bearing industry for grinding inner and outer bearing rings.
02.
Do CUMI wheels reduce heat during ring grinding? Yes — special bond systems dissipate heat efficiently to prevent burns on hardened rings.
03.
Can these wheels run on multi-wheel centerless setups? Yes — engineered geometry ensures uniform wear across multiple wheels on one spindle.
04.
What grinding modes are supported? Through-feed, end-feed and in-feed centerless grinding modes.
05.
Can the wheel be customized by ring size? Yes — hardness, porosity and grit can be customized for small, medium or large rings.

Related Products

IR Track Grinding Wheels - Bearing Industry

Good

IR Track Grinding Wheels – Bearing Industry

Crankshaft Grinding Wheels

Good

Crankshaft Grinding Wheels – Auto Components

Centerless Grinding Wheels

Good

Centerless Grinding for Drills & Taps

Centerless Grinding Pins

Good

Centerless Grinding – Pins

Centerless grinding valve stem

Good

Centerless Grinding – Valve Stem

CUMI Murugappa Logo

CUMI, a part of the 124-year-old Murugappa Group, began as an abrasives company in 1954.

GET CUMI Connect app

Google play store icon
Image representing to download the app in i store

Important Links

Contact us

Phone Number

1800 3000 1131

Email Address

email@cumi.murugappa.com

Copyright © 2026. All Rights Reserved.

Developed by Bluemein

Product Details Download