Retention Knobs

Manufactured to the Industry Standards or machine builders specifications.

Note:

It is critical that the correct retention knob is used with each machining center. Please verify all dimensions prior to ordering. Machine specifications will be located in your machine manual.

Knob Drawing
Knob Drawing
Shank Part Number A D1 D2 D3 L1 L2 L3 L4 H F T Socket O-Ring OD O-Ring ID Notes
BT30 HPS- 16 45 0.433 0.276 0.492 1.693 0.906 0.709 0.197 - 13MM M12 TWS-M13 - - MAS P30T-1
BT30 HPS- 16C 45 0.433 0.276 0.492 1.693 0.906 0.709 0.197 0.098 13MM M12 TWS-M13 Y MAS P30T-1
BT30 HPS- 16C-FA 45 0.433 0.315 0.492 1.693 0.906 0.709 0.197 0.157 13MM TWS-M13 Y - FANUC Coolant
BT30 HPS- 17 60 0.433 0.276 0.492 1.693 0.906 0.709 0.197 - 13MM M12 TWS-M13 MAS P30T-2
BT30 HPS- 17C 60 0.433 0.276 0.492 1.693 0.906 0.709 0.197 0.098 13MM M12 TWS-M13 Y MAS P30T-2
BT30 HPS- 17C-BR 60 0.433 0.295 0.492 1.693 0.906 0.709 0.197 0.098 13MM M12 TWS-M13 Y BROTHER COOLANT
BT40 HPS- 1 45 0.591 0.394 0.669 2.362 1.378 1.102 0.236 - 19MM M16 TWS-M19 - - MAS P40T-1
BT40 HPS- 1C 45 0.591 0.394 0.669 2.126 1.142 0.906 0.276 0.157 19MM M16 TWS-M19 Y - MAS P40T-1
BT40 HPS-806 -1 75 0.748 0.551 0.669 2.126 1.142 0.906 0.236 0.276 19MM M16 TWS-M19 Y - JIS B6339
BT40 HPS-G51 45 0.740 0.490 0.669 1.736 0.752 0.552 0.118 0.118 19MM M16 TWS-M19 Y - COOLANT
BT40 HPS-O 8 90 0.591 0.394 0.669 2.362 1.378 1.102 0.236 - 19MM M16 TWS-M19 MAS P40T-3
CAT40 HPS- 26 60 0.591 0.394 0.630 2.252 1.268 0.992 0.236 - 19MM 5/8-11 TWS-M19 MAS P40T-2
CAT40 HPS- 26C 60 0.591 0.394 0.641 2.252 1.268 0.992 0.236 0.157 19MM 5/8-11 TWS-M19 Y MAS P40T-2
CAT40 HPS- 72 45 0.591 0.394 0.641 2.250 1.266 0.990 0.236 - 19MM 5/8-11 TWS-M19 MAS P40T-1
CAT40 HPS- 72C 45 0.591 0.394 0.641 2.250 1.266 0.990 0.118 0.157 19MM 5/8-11 TWS-M19 Y MAS P40T-1
CAT40 HPS-806U-1 75 0.748 0.551 0.641 2.000 1.024 0.787 0.276 0.236 19MM 5/8-11 TWS-M19 Y JIS B6339
CAT40 HPS-806U-2 75 0.748 0.551 0.641 2.000 1.024 0.787 0.157 0.236 19MM 5/8-11 TWS-M19 Y MATSUURA
CAT40 HPS-B64-1 45 0.740 0.490 0.641 1.624 0.641 0.440 0.118 0.157 0.750 5/8-11 TWS-075 Y ANSI B5.50
CAT40 HPS-C40-DIN-C 75 0.748 0.551 0.641 2.010 1.024 0.787 0.157 0.276 19MM 5/8-11 TWS-M19 Y DIN 69872
CAT40 HPS-C40-MORI-CO 75 0.748 0.551 0.641 2.015 1.029 0.793 0.236 0.276 19MM 5/8-11 TWS-M19 Y Y MORI ORING
CAT40 HPS-D72 45 0.740 0.490 0.641 1.624 0.640 0.440 0.118 0.291 0.750 5/8-11 TWS-075 Y ANSI B5.50
CAT40 HPS-G60 45 0.740 0.490 0.641 1.624 0.640 0.440 0.118 - 0.750 5/8-11 TWS-075 OKUMA
CAT40 HPS-O14 90 0.591 0.394 - 2.244 1.260 0.984 0.236 - 17MM 5/8-11 TWS-M17 MAS P40T-3 MORI
CAT40 HPS-O14-C 90 0.591 0.394 0.641 2.244 1.260 0.984 0.236 0.157 17MM 5/8-11 TWS-M17 Y MAS P40T-3
CAT50 HPS-C50-MAZAK-C 45 1.140 0.820 1.031 2.303 1.000 0.700 0.197 0.394 1.187 1"-8 TWS-118 Y MAZAK
CAT50 HPS- 54 45 0.906 0.669 1.031 3.354 1.780 1.386 0.402 0.236 30MM 1"-8 TWS-M30 Y MAS P50T-1
CAT50 HPS- 63 60 0.906 0.669 1.024 3.248 1.772 1.378 0.394 30MM 1"-8 TWS-M30 MAS P50T-2
CAT50 HPS-711-45 75 1.102 0.827 1.031 2.913 1.338 0.984 0.197 0.468 30MM 1"-8 TWS-M30 Y JIS B6339
CAT50 HPS-B61 60 0.906 0.669 1.024 3.248 1.772 1.378 0.394 0.236 30MM 1"-8 TWS-M30 Y MAS P50T-1
CAT50 HPS-D92 45 1.140 0.820 1.031 2.580 1.000 0.700 0.210 0.457 1.250 1"-8 TWS-125 Y ANSI B5.50
CAT50 HPS-G43 45 1.140 0.820 1.031 2.303 1.000 0.700 0.197 0.394 1.187 1"-8 TWS-118 MAZAK 16mm CBORE
CAT50 HPS-O19 90 0.906 0.669 - 3.346 1.780 1.386 0.394 - 30MM 1"-8 TWS-M30 MAS P50T-3 MORI
CAT50 HPS-O19-C 90 0.906 0.669 1.031 3.346 1.780 1.386 0.394 0.250 30MM 1"-8 TWS-M30 Y MAS P50T-3