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Centerless Grinding - Valve Stem

Centerless Grinding – Valve Stem

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An application which 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.
Type Operation Speed Good Better Best
Mono Valve
(Inlet Valve) 		Rough 35 A463 M3 V2018 A463 P5 V2020 9A463 M3 V887
50 A463 M3 V2018/50 A463 P5 V2020/50 9A463 M3 V887/50
Semi Finish 35 A60 L5 V2016 DA60 V2016 9A60 L5 V887
50 A60 L5 V2016/50 DA60 V2016/50 9A60 L5 V887/50
Finish 35 A100 J5 V10C DA100 J5 V2016 9A100 S5 V887
50 A100 J5 V10C/50 DA100 J5 V2016/50 9A100 S5 V887/50
Bi – Metal
(Exhaust Valve) 		Rough 35 - - 9A463 M3 V887
50 9A463 M3 V887/50
Semi Finish 35 - - 9A60 L5 V887
50 9A60 L5 V887/50
Finish 35 - - 9A100 J5 V887
50 9A100 J5 V887/50
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
Auto/Auto Ancillary
Applications
Centreless

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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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Phone Number

1800 3000 1131

Email Address

email@cumi.murugappa.com

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