Photo comingSpecifications below are Pioneer’s.
JEM # HPI-HPS-806-1HPS-806-1
BT40 retention knob, JIS B6339, 15° (also called 75°), M16, coolant-through, O-ringBT4015°M16Coolant-through
SpecificationsFrom Pioneer's catalog
- Taper
- BT40
- Style
- JIS B6339
- Angle
- 15° (also called 75°)
- Thread
- M16
- Overall length
- 2.126"
- Flange to end of knob
- 1.142"
- Knob Ø
- .748"
- Neck Ø
- .551"
- Coolant
- Coolant-through
- with O-ring
- Socket
- TWS-M19
Machines
Machines this knob is listed for
BT40, 15° (also called 75°), JIS B6339.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 |
| Yasda | YBM, YPC, VPC series, H30i, H40 (40-taper)Coolant-through takes the builder’s own knob | BT40 / CAT40 |
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)
- 2.126"
- Head Ø (D1)
- .748"
- Neck Ø (D2)
- .551"
- Pilot Ø (D3)
- .669"
- Projection (L2)
- 1.142"
- Pull location (L3)
- .906"
- Flange (L4)
- .276"
- Coolant hole Ø (H)
- .236"
- Hex flats (F)
- 19mm
- Thread
- M16
- Tightening socket
- TWS-M19
Where Pioneer’s sources differ
- Pioneer lists the angle as 75°, the same knob Western catalogs call 15°.
- Flange (L4): Pioneer's catalog says 0.276", its web table 0.236". The catalog value is shown.