Photo comingSpecifications below are JM Performance’s.
JM31619HT
BT40 High Torque retention knob, 15° (also called 75°), M16, coolant-through, O-ringsBT4015°M16Coolant-through
SpecificationsFrom JM Performance's product pages
- Taper
- BT40
- Style
- JIS B 6339 / DIN 69872 style (15°)
- read from the dimensions
- Angle
- 15° (also called 75°)
- Thread
- M16
- Flange to end of knob
- 1.140"
- Knob Ø
- .746"
- Neck Ø
- .549"
- Coolant
- Coolant-through
- with O-ring
- Socket
- RKW40
Machines
Machines this knob is listed for
BT40, 15° (also called 75°), JIS B 6339 / DIN 69872 style (15°).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 |
|---|---|---|
| DMG MORI / Mori Seiki | Same series WITH through-spindle coolant (e.g. CMX 1100 V CTS option)Builder p/n J-022343 (option code, Special Center-Through knob, #40) | BT40 / CAT40 |
| Doosan / DN Solutions | DNM series (DNM 4500/5700/6700, DNM 4th gen) and other current 40-taper VMCs; BT40 standardBuilder p/n PS806 | BT40 |
| Kitamura | Current Mycenter / HX / Supercell (Mycenter-3XG, 4XiF, 7X, HX400G, HX500i-1250i, Supercell-400, Mytrunnion-5, Bridgecenter) | BT40 / CAT40 |
| Makino | a-series HMCs, PS/V-series VMCs (a51nx, a61nx, PS95, PS105, V33i, F3/F5 etc.), 40-taper | BT40 / CAT40 |
| Matsuura | Current MC/RA/MAM/FX/H.Plus/V.Plus/MX-520/VX-1000 40-taper | BT40 / CAT40 |
JM Performance’s own machine guide lists this knob for Doosan (BT40), Kitamura (BT40), Leblond Makino (BT40), Matsuura (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
- .746"
- Neck Ø
- .549"
- Flange to start of angle (L1)
- .903"
- Flange to end of knob (L2)
- 1.140"
- Flange thickness
- .274"
- Flange (shoulder) Ø
- .903"
- Pilot Ø
- .669"
- Wrench flats
- .746"
- Coolant hole Ø
- .281"
- Thread Side O-ring
- 1.5X14N70
- Thread
- M16
- Tightening socket
- RKW40