Photo comingSpecifications below are JM Performance’s.

JM31517AHTHS

Name: BT40 High Torque retention knob, 45°, M16, coolant-through, 9310H, O-rings
Brand: JM Performance
SKU: JM31517AHTHS
Price: 69.92 USD
Availability: BackOrder

BT40 High Torque retention knob, 45°, M16, coolant-through, 9310H, O-rings

BT4045°M16Coolant-through

SpecificationsFrom JM Performance's product pages

Taper: BT40
Style: —
Angle: 45°
Thread: M16
Flange to end of knob: 1.376"
Knob Ø: .589"
Neck Ø: .392"
Coolant: Coolant-through; with O-ring
Socket: RKW40

Machines

Machines this knob is listed for

BT40, 45°.

Find the knob for another machine

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 (formerly Hitachi Seiki)	VK, VM-40/50, VS-40/50/60, VKC, VA, HG-400, HS, HK-630, HA series; Hitachi Seiki VA-35/40, HC-400, VK-45, VM-40, Minimatic	BT40 / CAT40
Fryer	Fryer VMCs / bed mills (CAT40, BT40, CAT50)	CAT40 / BT40 / CAT50
Haas	BT40 mills (BT option, mostly export)Builder p/n 04-0297 (TSC)	BT40
Hwacheon	VESTA-660, VESTA-650T, VESTA-610D, VESTA-1000+, SIRIUS-UL+ (12K/14K/20K) and other BT40 models	BT40 / CAT40
Hyundai WIA	KF series VMCs (KF4600, KF5600, KF5600 II, KF6700 etc.), BBT40 standard	BT40
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
Leadwell	MCV-0, MCV-OP, MCV-550E/S/D, MCV-610S, MCV-760XL, V-350, V-410, MCH-350/500	BT40 / CAT40
Okuma	Okuma-Howa / MILLAC series (Millac 3-VA, 4-VA, 4-H; MILLAC V/H; MM-300, ML-300)	BT40 / CAT40
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.

JM Performance’s dimensions

Knob Ø: .589"
Neck Ø: .392"
Flange to start of angle (L1): 1.100"
Flange to end of knob (L2): 1.376"
Flange thickness: .234"
Flange (shoulder) Ø: .938"
Pilot Ø: .669"
Wrench flats: .745"
Coolant hole Ø: .118"
Knob Side O-ring: 005000-N70
Thread Side O-ring: 1400-N70
Thread: M16
Tightening socket: RKW40

From JM Performance’s product page.

Builder

Machines

Taper

DMG MORI (formerly Hitachi Seiki)

VK, VM-40/50, VS-40/50/60, VKC, VA, HG-400, HS, HK-630, HA series; Hitachi Seiki VA-35/40, HC-400, VK-45, VM-40, Minimatic

BT40 / CAT40

Fryer

Fryer VMCs / bed mills (CAT40, BT40, CAT50)

CAT40 / BT40 / CAT50

Haas

BT40 mills (BT option, mostly export)Builder p/n 04-0297 (TSC)

BT40

Hwacheon

VESTA-660, VESTA-650T, VESTA-610D, VESTA-1000+, SIRIUS-UL+ (12K/14K/20K) and other BT40 models

BT40 / CAT40

Hyundai WIA

KF series VMCs (KF4600, KF5600, KF5600 II, KF6700 etc.), BBT40 standard

BT40

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

Leadwell

MCV-0, MCV-OP, MCV-550E/S/D, MCV-610S, MCV-760XL, V-350, V-410, MCH-350/500

BT40 / CAT40

Okuma

Okuma-Howa / MILLAC series (Millac 3-VA, 4-VA, 4-H; MILLAC V/H; MM-300, ML-300)

BT40 / CAT40

YCI / Yama Seiki (YCM)

YCM VMC-60A/72A, MAX3 and other YCI machines

BT40 / CAT40 / CAT50

JM Performance’s dimensions

Knob Ø

.589"

Neck Ø

.392"

Flange to start of angle (L1)

1.100"

Flange to end of knob (L2)

1.376"

Flange thickness

.234"

Flange (shoulder) Ø

.938"

Pilot Ø

.669"

Wrench flats

.745"

Coolant hole Ø

.118"

Knob Side O-ring

005000-N70

Thread Side O-ring

1400-N70

Thread

M16

Tightening socket

RKW40