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Thread Grinding Wheels

Information material:

CUMI Bonded Abrasives Catalogue
Product description

Being a high speed, high material removal application with stringent demands on the thread profile, generating threads on taps and drills by grinding isn't an easy job.

CUMI's Thread grinding wheels are formulated with high purity, Sharp Aluminium Oxide grains combined with a special glassy, fusible bond. This ensures excellent form retention of the wheel, which translates into consistent thread profile of components.

Features of Thread Grinding wheels:

  1. Hi performance hard, sharp & friabe Aluminium Oxide abrasive blend
  2. Fusible, Glassy crystaline bond for improved form holding
  3. Special manufacturing process for uniform hardness across diameter

Features of Thread Roll Die Grinding Wheels:

  1. High purity closely graded Green Silicon Carbide micro grits
  2. Special Low temperature fired Vitrified bond for improved form holding
  3. Special manufacturing process for uniform hardness across wheel thickness
Abrasive usedCUMI CodeGritDiameter ( mm )Diameter ( Inch )Thickness ( mm )Thickness ( Inch )Speed (mps)HardnessStructure
Ceramic Aluminium OxideMCA120 - 400200 - 5108 - 206 - 401/4 to 1 1/2upto 80I - M4 - 10
Sharp Aluminium Oxide55A
White Aluminium OxideAA
Pink Aluminium OxideRA
Thread (pitch, mm)BestBetterGood
0.4—0.71CUMISA400 J9 VF920/80-AA400 K9 VF920/80
0.8—1.01CUMISA320 J9 VF920/8055A320 K9 VF920/80AA320 K9 VF920/80
1.25 — 1.51CUMISA280 L10 V457/80-AA280 L10 V457/80
1.75 —2.01CUMISA240 K9 V457/8055A220 J9 V457/80AA240 L9 V457/80
2.251CUMISA220 K9 V457/8055A220 K9 V457/80AA220 M9 V457/80
2.50 - 3.001CUMISA180 L9 V457/8055A180 K9 V457/80AA180 M9 V457/80
3.25 -4.001CUMISA150 L9 V457/8055A150 L8 V457/80AA150 M9 V457/80
Thread (pitch,MM)TPIGrading
0.736GC400 I5 VFG72
0.832
125GC320 I5 VFX72
1.2550
1.517GC280 I5 VFG72
1.7515
213GC220 I5 VFG72
2.510
3.57
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