Products

Vitrified 80 Series

Applications

【Bond : V201, V208】
・Precision grinding for hardened steel, such as
 carbon steels, alloy steels, tool steels,
 and die steels, etc.
【Bond : V303】
・Angular grinding
・Centerless grinding
・Other precision grinding
・Precision grinding for alloy steels, tool steels,
 and other hardened steels

Features & Benefits

■80A wheel
80A abrasive is a monocrystalline alumina abrasive, manufactured by the advanced technique.
Due to the extreme hardness and unique fracturing which generates many new cutting edges,
it has longer wheel life and lower grinding force than that of WA.
It also gives better cost performance than a ceramic abrasive wheel at low metal removal rate of 3mm3/mm・sec.

■Selection of the bond type for 80A abrasive:
  □V201 is the standard vitrified bond.
  □V208 is designated for hard grade
  □V201R, and V208 are designated for semi-porous wheel.
  □V201P is designated for porous wheel.
  □V203 is designated for high-porous wheel.

■85A wheel
85A abrasive is developed for higher grinding performance than that of a conventional pink colored alundum abrasive.

Case history

■Grinding conditions
  ・Grinding mode : Cylindrical plung grinding
  ・Wheel specifications :405 × 25 × 152.4 WA 60 K 8 VSK-1
                 32A 60 K 8 VSK-1
                 80A 60 K 8 V201
  ・Workpiece material : S55C(φ 60mm HRc58)
  ・Wheel speed : 33m/s
  ・Work speed : 0.33m/s
  ・Coolant : KURECUT NET-500B (X50)

■Grinding conditions
  ・Grinding mode : Cylindrical grinding
  ・Wheel specifications :405 × 25 × 152.4 80A 60 K 8 V303
                 405 × 25 × 152.4 32A 60 K 8 VSK-1
  ・Workpiece material : S55C (Hardened)
  ・Wheel speed : 33m/s
  ・Work speed : 0.3m/s
  ・Coolant : KURECUT NET500B (2%)
  ・MRR(Z‘) : 2.5,5mm3/mm・sec

■Results
  Compared with conventional wheels (32A wheel), 85A wheel indicated as follows:
  Grinding ratio : Improve by 30%
  Grinding force : Decrease by 6%
  Surface roughness : Equivalent

■Grinding conditions
  In-house grinding test results