Photo comingSpecifications below are JM Performance’s.
JM31113AHS
BT40 retention knob, 60°, M16, solid, 9310HBT4060°M16Solid
SpecificationsFrom JM Performance's product pages
- Taper
- BT40
- Style
- —
- Angle
- 60°
- Thread
- M16
- Flange to end of knob
- 1.376"
- Knob Ø
- .589"
- Neck Ø
- .391"
- Coolant
- Solid
- Socket
- RKW40
Machines
Machines this knob is listed for
BT40, 60°.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 |
|---|---|---|
| Okuma | BT40 machines: MA, MB, MC, MD, MF, MU, MX-A series, VH-40, VR-40, MP-46V, GENOSCoolant-through takes the builder’s own knob | BT40 |
JM Performance’s own machine guide lists this knob for Enshu (BT40), Hitachi-Seiki (BT40), Matsuura (BT40), Milltronics (BT40). JM gives its machines as a reference only, not a guarantee.
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.
JM Performance’s dimensions
- Knob Ø
- .589"
- Neck Ø
- .391"
- Flange to start of angle (L1)
- 1.100"
- Flange to end of knob (L2)
- 1.376"
- Flange thickness
- .234"
- Flange (shoulder) Ø
- .903"
- Pilot Ø
- .669"
- Wrench flats
- .741"
- Thread
- M16
- Tightening socket
- RKW40