Centerless Grinding – Pins

Name: Centerless Grinding - Pins
Brand: CUMI Abrasives
SKU: CGW-PINS-001
Author: CUMI Abrasive Team

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Centerless grinding pins represent one of the most demanding applications for abrasive manufacturers. Requirements vary widely across products, calling for equally diverse solutions. With multiple wheels mounted on a spindle, tight control of geometry and density is critical for uniform wear. CUMI delivers customized solutions using advanced manufacturing, premium abrasive grains, and vitrified, resinoid, and rubber bond systems for through-feed, end-feed, and in-feed applications.

Brand: CUMI

Information Material:

Product Catalogue

Type	Operation	Speed	Good	Better	Best
Gudgeon Pin	Rough	35	A463 L5 V10C	AA463 L5 V2020	1CUMISA461 K6 VCAE
	Rough	50	A463 K5 V45C	AA463 K5 V2020/50	1CUMISA461 K6 VC500/50
	Semi Finish	35	A60 L5 V10C	AA60 L5 V2020	1CUMISA601 K6 VCAE
	Semi Finish	50	A60 K5 V45C	AA60 K5 V2020/50	1CUMISA601 K6 VC500/50
	Finish	35	A100 J5 V10C	AA100 J5 V2020	1CUMISA100 J6 VC500
	Finish	50	A100 J5 V45C	AA100 J5 V2020/50	1CUMISA100 J6 VC500/50
	Fine Finish	35	-	A220 N5 VK12	-
	Super Finish	35	-	C320 P5 BYZ	A400 F5 RABX
	Super Finish	45	-	-	A400 G7 RBCX

CUMI Code	Grit Range	Diameter		Thickness		Hardness	Structure	Speed
CUMI Code	Grit Range	(mm)	(Inch)	(mm)	(Inch)	Hardness	Structure	(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

Auto/Auto Ancillary

Applications

Centreless

Product Description

Centerless grinding for pins demands extreme precision, consistent geometry, and uniform wheel wear—especially when multiple wheels run on one spindle. CUMI Centerless Wheels deliver customized, high-performance grinding for mass production of pins, ensuring dimensional accuracy, tight tolerances, and thermal-safe stock removal. Ideal for OEM Auto / Auto Ancillary plants requiring long wheel life and reduced changeover downtime.

FAB – Features → Advantage → Benefit

Premium abrasive grains → free-cutting & cool grind → prevents burn & maintains integrity of pin components
Vitrified / Resin / Rubber custom bonds → optimized density & shape retention → uniform wear pattern even across multi-wheel setups
Advanced manufacturing precision → geometry control within microns → ensures tolerances in through-feed, in-feed & end-feed operations
Customized variants per operation → correct hardness & structure selection → extends wheel life & reduces CPC
High-speed stable construction → supports 35, 50 & 63 mps applications → productivity boost in high-volume lines

Industry: Auto / Auto-Ancillary (Pins grinding segment)

FAQs

01.

Which industry uses Centerless Grinding Wheels for pins? These wheels are primarily used in Auto / Auto-Ancillary manufacturing, especially for gudgeon and piston pin finishing.

02.

Can one wheel perform rough & finish grinding together? Yes—CUMI also offers universal-grade wheels for customers who require a single-wheel solution.

03.

What grinding methods does this wheel support? It supports through-feed, in-feed, and end-feed centerless grinding processes.

04.

Does wheel geometry impact final tolerance accuracy? Absolutely—CUMI wheels are manufactured with extremely tight geometry tolerance to ensure uniform wear and consistent pin diameter.

05.

Can these wheels be customized? Yes, CUMI provides custom bond, grit & size solutions based on machine speed, pin diameter & surface finish requirements.