

JEM # HPI-HPS-C50-MAS-45-CHPS-C50-MAS-45-C
CAT50 retention knob, MAS 403 P50T-1, 45°, 1-8, coolant-through, O-ringCAT5045°1-8Coolant-through
SpecificationsFrom Pioneer's catalog
- Taper
- CAT50
- Style
- MAS 403 P50T-1
- Angle
- 45°
- Thread
- 1-8
- Overall length
- 3.354"
- Flange to end of knob
- 1.780"
- Knob Ø
- .906"
- Neck Ø
- .669"
- Coolant
- Coolant-through
- with O-ring
- Socket
- TWS-M30
Machines
Machines this knob is listed for
CAT50, 45°, MAS 403 P50T-1.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 |
|---|---|---|
| Fryer | Fryer VMCs / bed mills (CAT40, BT40, CAT50) | CAT40 / BT40 / CAT50 |
| Haas | CT50 machines (VF-*/50, VS, EC-1600, VR, HS) | CAT50 |
| Johnford | VMC-1050 and other Johnford VMCs | BT40 / CAT40 / CAT50 |
| Kitamura | Older Mycenter 3, 4, 5, 6, H300, H300B, H500, H600, H800, Jig Center 7/8 | CAT40 / BT40 / CAT50 |
| Toyoda / JTEKT | 50-taper FV, FVN, FHN, FXN, PV, BN, FH, FA, RB, SB, SV-65, e500H5; DN-1V/2V/1H | BT50 / CAT50 |
| YCI / Yama Seiki (YCM) | YCM VMC-60A/72A, MAX3 and other YCI machines | BT40 / CAT40 / 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)
- 3.354"
- Head Ø (D1)
- .906"
- Neck Ø (D2)
- .669"
- Pilot Ø (D3)
- 1.031"
- Projection (L2)
- 1.780"
- Pull location (L3)
- 1.386"
- Flange (L4)
- .402"
- Coolant hole Ø (H)
- .236"
- Hex flats (F)
- 30mm
- Thread
- 1-8
- Tightening socket
- TWS-M30