Bore Grinding Wheels – Bearing Industry

Name: Bore Grinding Wheels - Bearing Industry
Brand: CUMI Abrasives
Author: CUMI Abrasive Team

Good

Internal or bore grinding wheels are used for grinding the inner diameter of bearings, gears & automobile components to an accurate size & desired finish. CUMI’s versatile range of bore grinding wheels are used for grinding a variety of components that require size generation, fine surface finish, and fast stock removal. We also offer value-added services like special treatment for lubrication & cooler cutting action.

Brand: CUMI

Information Material:

Product Catalogue

Material	Hardness	Bearing I.D (mm)	Speed	Good	Better	Best
Taper Roller Bearing (TRB)	55 - 60 HRc	<= 70	upto 50	SA60 J7 V144	55A80 J7 VC500	3CN80 J6 VC500
		<= 70	63	RA60 J7 VF8	55A80 J7 VC500	3CN80 J6 VC500
		> 70	Upto 50	SA80 J7 V144	55A80 J7 VC500	3CN80 I6 VC500
		> 70	63	RA80 J7 VF8	55A80 J7 VC500	3CN80 I6 VC500

CUMI Code	Grit Range	Diameter		Thickness		Hardness	Structure	Speed
		(mm)	(inch)	(mm)	(inch)			(mps)
CN/CSA	60 - 120	10 - 20	3/8 - 5	5 - 75	1/5 - 3	I - M	6 - 8	33, 50 & 63
RA							7
55A							7
SA							5 - 8

Product Information

Features

- Sharp aluminium oxide grains

- Krystal bond for form holding(VSOO)

- Available in various shapes

Benefits

- Excellent cutting action

- Good form retention

- Excellent surface finish

Advantages

- Less dressing intervention

- Reduced cycle time

- Burn free surface

Product Uses

Industries

Bearing

Product Description

Bore grinding is a precision operation where inner diameter accuracy, surface finish, and roundness directly determine bearing performance, noise level, and rotational smoothness. CUMI Bore Grinding Wheels are optimized for honing, ID finishing, and stock removal across bearing races, sleeves, and cages—combining fast cutting action with controlled surface finish, ideal for modern high-speed bearing production lines.

Feature → Advantage → Benefit

Specialized bore-sized ID wheels → exact dimensional sizing → improves bearing fit & eliminates assembly issues
Premium vitrified bond with lubrication treatment → cooler cutting → prevents burns & micro-cracks in raceways
Versatile grit range for ID work → controlled material removal → supports roughing-to-finishing in one setup
Fast stock removal + smooth finish → reduces cycle time → increases production throughput in bearing plants

Custom bore wheel sizes & hardness options → match part geometry → reduces dressing frequency & improves wheel life

Industry: Bearing Industry – bore/ID grinding of races, inner rings, cages & automotive bearing components

FAQs

01.

Where are bore grinding wheels used? In bearing production for inner diameter grinding of races and cages

02.

Do these wheels reduce heat in ID grinding? Yes — lubrication-treated bonds provide cooler cutting.

03.

Can a single wheel handle roughing & finishing? Yes — grit and structure options allow multi-stage machining.

04.

Are custom ID wheel sizes available? Yes — wheels are made to order based on bore diameter & width.

05.

Can it be used for gears and auto components? Yes — besides bearings, wheels are suitable for ID grinding in gears and automotive parts.

Bore Grinding Wheels – Bearing Industry

Product Information

Features

Benefits

Advantages

Product Uses

Industries

Product Description

Feature → Advantage → Benefit

FAQs

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

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