Photo comingSpecifications below are Pioneer’s.
JEM # HPI-HPS-G51 (40420162)HPS-G51
BT40 retention knob, ANSI B5.50 (on BT40), 45°, M16, coolant-through, O-ringBT4045°M16Coolant-through
SpecificationsFrom Pioneer's catalog
- Taper
- BT40
- Style
- ANSI B5.50 (on BT40)
- Angle
- 45°
- Thread
- M16
- Overall length
- 1.736"
- Flange to end of knob
- .752"
- Knob Ø
- .740"
- Neck Ø
- .490"
- Coolant
- Coolant-through
- with O-ring
- Socket
- TWS-M19
Machines
Machines this knob is listed for
BT40, 45°, ANSI B5.50 (on BT40).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 |
|---|---|---|
| Fadal | Same VMCs with BT40 spindle | BT40 |
| Mazak | Same series with BT40 spindle (non-US or BT option) | BT40 |
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)
- 1.736"
- Head Ø (D1)
- .740"
- Neck Ø (D2)
- .490"
- Pilot Ø (D3)
- .669"
- Projection (L2)
- .752"
- Pull location (L3)
- .552"
- Flange (L4)
- .118"
- Coolant hole Ø (H)
- .276"
- Hex flats (F)
- 19mm
- Thread
- M16
- Tightening socket
- TWS-M19