Shrink Fit Adaptors

  • Manufactured from High Density Steel
  • Provides superior clamping force AND concentricity
  • Duly tempered and hardened to 52+2 HRC
  • Available in types AD & AD/B
  • Balancing:
    • Standard G6.3@15000RPM
    • G2.5@25000 RPM on request
  • Available Shank types
    • MAS 403 BT (JIS 6339)
      • Standard
      • Dual Contact
    • ISO (DIN 2080)
    • CAT (ASME B5.50)
    • SK (DIN 69871)
Shrink Fit Adaptors
Shrink Fit Adaptors



High Density Steel

JIS:6339, DIN:69871 DIN:2080

0.003 mm

Working of a Shrink Fit Adaptor


A Shrink Fit holder utilizes the thermal properties of the metal in order to form a tight grip over the tool.

  • The bore of the adaptor is made nominally smaller than the shank of the tool that needs to be clamped.
  • When exposed to sufficient heat the bore expands thus enabling it to now accomodate the slightly larger tool shank.
  • As the heat dissipiates the holder compresses around the shank exerting high clamping forces.

Akros Shrink fit holders offer concentricity within 3 Microns while the rigid and uniform clamping prevents the tool from slipping. DESCRIPTION






CA-SFA-BT40L120 BT 40 120 6,8,10,12,14,16,18,20,25
CA-SFA-BT50L100 BT 50 100 6,8,10,12,14,16,18,20,25,32


CA-SFA-SK40L80 SK 40 80 6,8,10,12,14,16,18,20
CA-SFA-SK40L100 SK 40 100 25