

JEM # HPI-HPS-G43 (50720451)HPS-G43
CAT50 retention knob, ANSI B5.50 (Mazak spec, 16 mm counterbore in face), 45°, 1-8, coolant-through, O-ringCAT5045°1-8Coolant-through
SpecificationsFrom Pioneer's catalog
- Taper
- CAT50
- Style
- ANSI B5.50 (Mazak spec, 16 mm counterbore in face)
- Angle
- 45°
- Thread
- 1-8
- Overall length
- 2.303"
- Flange to end of knob
- 1.000"
- Knob Ø
- 1.140"
- Neck Ø
- .820"
- Coolant
- Coolant-through
- with O-ring
- Socket
- TWS-118
Machines
Machines this knob is listed for
CAT50, 45°, ANSI B5.50 (Mazak spec, 16 mm counterbore in face).Verify firstListed as a guide only. Builders change knob specs between models, years and coolant options, so check your machine’s manual, or send us the make, model and serial number and we’ll confirm before you order. The wrong retention knob can let a holder pull out of the spindle.
| Builder | Machines | Taper |
|---|---|---|
| Mazak | 50-taper VCN/VTC/H/FH/Integrex/Variaxis 50 | CAT50 / BT50 |
Pioneer’s own machine guide lists this knob for Mazak (CAT50).
Don’t see your machine? Call the counter at 408-834-8656 with the make, model and serial number and we’ll find the right knob.
Pioneer’s dimensions
- Overall length (L1)
- 2.303"
- Head Ø (D1)
- 1.140"
- Neck Ø (D2)
- .820"
- Pilot Ø (D3)
- 1.031"
- Projection (L2)
- 1.000"
- Pull location (L3)
- .700"
- Flange (L4)
- .197"
- Coolant hole Ø (H)
- .394"
- Hex flats (F)
- 1.187 in
- Thread
- 1-8
- Tightening socket
- TWS-118