Cutting tools and holders last longer when you…Torque it right!

torque wrench and tightening stand

We recommend using a tightening fixture and torque wrench to make sure cutting tools and retention knobs are properly tightened.

Over-tightening can distort or even crack collets, causing runout problems and premature failure of the collet, nut, tool holder and cutting tool.

Under-tightening can also cause poor cutting performance, or allow cutting tools to fly out of the spindle – a very serious safety hazard.

Collet Chuck Tightening Directions

ER collet chuck

1. Snap collet into nut.

2. Insert cutter into collet. Collets without counter bore require shank to extend to the bottom of the collet.

3. Hand tighten collet nut assembly into tool holder.

4. Insert tool holder assembly into tightening fixture and secure it.

5. Tighten collet nut to recommended torque using a torque wrench and adapter.


Recommended Tightening Specifications for Collets

Collet
Nut Type
Collets I.D.
OVER 1/16" (2mm)
Collets I.D.
UNDER 1/16" (2mm)
Order Torque
Wrench Adapter
ER 16
slotted
42 ft/lbs
30 ft/lbs
04580-16
ER 16
hex
42 ft/lbs
30 ft/lbs
04601-16
ER 20
slotted
59 ft/lbs
24 ft/lbs
04580-20
ER 20
hex
59 ft/lbs
24 ft/lbs
04602-20
ER 25
slotted
77 ft/lbs
77 ft/lbs
04503-25
ER 25
mini nut
25 ft/lbs
25 ft/lbs
4587
ER 32
slotted
100 ft/lbs
100 ft/lbs
04604-32
ER 40
slotted
130 ft/lbs
130 ft/lbs
04605-40
SYOZ 25
hook
90 ft/lbs
90 ft/lbs
03690-25
TG 75
hook
90 ft/lbs
90 ft/lbs
04018-TWA
TG 100
hook
90 ft/lbs
90 ft/lbs
03690-25

Recommended Tightening Specifications for Retention Knobs

Retention Knobs
Wrench Flats
Drive
Torque
Order Socket
BT 30 Taper
0.535"
1/4"
36 ft/lbs
PSS-30BT
ISO 30 Taper
0.535"
3/8"
36 ft/lbs
PSS-30ISO
Any 40 Taper
0.750"
3/8"
76 ft/lbs
PSS-40
BT 50 Taper
1.187"
1/2"
99 ft/lbs
PSS-50
CAT 50 Taper
1.250"
1/2"
99 ft/lbs
PSSC-50
 

CAT 40 End Mill Holders

Part No.
Description
Torque
22907
CAT40x1/8x2.375
4 ft/lbs
22907-5.00-RR
CAT40x1/8xRR
4 ft/lbs
22907-6
CAT40x1/8x6
4 ft/lbs
22909
CAT40x3/16x2.5
6 ft/lbs
22909-4.72-RR
CAT40x3/16xRR
6 ft/lbs
22909-6
CAT40x3/16x6
6 ft/lbs
22911
CAT40x1/4x3
6 ft/lbs
22911-1.75
CAT40x1/4x1.75
6 ft/lbs
22911-2.5
CAT40x1/4x2.5
6 ft/lbs
22911-2.5-FID
CAT40x1/4xFID
6 ft/lbs
22911-4.72-RR
CAT40x1/4xRR
6 ft/lbs
22911-6
CAT40x1/4x6
6 ft/lbs
22911-DIN
CAT40x1/4xDIN
6 ft/lbs
22913
CAT40x5/16x3
10 ft/lbs
22913-2.5
CAT40x5/16x2.5
10 ft/lbs
22913-4.72-RR
CAT40x5/16xRR
10 ft/lbs
22915
CAT40x3/8x3
15 ft/lbs
22915-1.75
CAT40x3/8x1.75
10 ft/lbs
22915-2.5
CAT40x3/8x2.5
15 ft/lbs
22915-2.5-FID
CAT40x3/8xFID
15 ft/lbs
22915-4.72-RR
CAT40x3/8xRR
15 ft/lbs
22915-5
CAT40x3/8x5
15 ft/lbs
22915-DIN
CAT40x3/8xDIN
15 ft/lbs
22916
CAT40x7/16x2.5
20 ft/lbs
22917
CAT40x1/2x3
20 ft/lbs
22917-1.75
CAT40x1/2x1.75
20 ft/lbs
22917-2.5
CAT40x1/2x2.5
20 ft/lbs
22917-2.5-FID
CAT40x1/2xFID
20 ft/lbs
22917-2.63
CAT40x1/2x2.63
20 ft/lbs
22917-4.72-RR
CAT40x1/2xRR
20 ft/lbs
22917-DIN
CAT40x1/2xDIN
20 ft/lbs
22918
CAT40x1/2x4.63
20 ft/lbs
22919
CAT40x5/8x3
35 ft/lbs
22919-1.75
CAT40x5/8x1.75
35 ft/lbs
22919-DIN
CAT40x5/8xDIN
35 ft/lbs
22920
CAT40x5/8x3.75
35 ft/lbs
22920-5.75
CAT40x5/8x5.75
35 ft/lbs
22921
CAT40x3/4x3.5
45 ft/lbs
22921-1.75
CAT40x3/4x1.75
45 ft/lbs
22921-3
CAT40x3/4x3
45 ft/lbs
22921-3-DIN
CAT40x3/4xDIN
45 ft/lbs
22921-3-FID
CAT40x3/4xFID
45 ft/lbs
22921-5
CAT40x3/4x5
45 ft/lbs
22923
CAT40x7/8x3.5
45 ft/lbs
22925
CAT40x1x4
70 ft/lbs
22925-1.75
CAT40x1x1.75
45 ft/lbs
Part No.
Description
Torque
22925-6
CAT40x1x6
70 ft/lbs
22925-DIN
CAT40x1xDIN
70 ft/lbs
22925-FID
CAT40x1xFID
70 ft/lbs
22927
CAT40x1-1/4x4.6
70 ft/lbs
22929
CAT40x1-1/2x4.5
70 ft/lbs

BT 30 End Mill Holders

Part No.
Description
Torque
07130-1/8
BT30x1/8
4 ft/lbs
07130-3/16
BT30x3/16
6 ft/lbs
07130-1/4
BT30x1/4
6 ft/lbs
07130-5/16
BT30x5/16
10 ft/lbs
07130-3/8
BT30x3/8
15 ft/lbs
07130-7/16
BT30X7/16
20 ft/lbs
07130-1/2
BT30x1/2
20 ft/lbs
07130-5/8
BT30x5/8
35 ft/lbs
07130-3/4
BT30x3/4
45 ft/lbs

CAT and BT Milling Chucks

Part No.
Description
Torque
23241
CAT40 3/4" - 3.62"
45 ft/lbs
23242
CAT40 3/4" - 4.13"
45 ft/lbs
23246
CAT40 1 1/4" - 4.52"
45 ft/lbs
23252
CAT50 3/4" - 4.13"
45 ft/lbs
23256
CAT50 1 1/4" - 4.13"
45 ft/lbs
05990
BT40 3/4" - 3.15"
45 ft/lbs
05991
BT40 1 1/4" - 3.54"
45 ft/lbs


CAT 50 End Mill Holders

Part No.
Description
Torque
22931
CAT50x1/4x4
6 ft/lbs
22931-2 1/2
CAT50x1/4x2-1/2
6 ft/lbs
22933
CAT50x5/16x4
10 ft/lbs
22935
CAT50x3/8x4
15 ft/lbs
22935-2 1/2
CAT50x3/8x2-1/2
15 ft/lbs
22935-6
CAT50x3/8x6
15 ft/lbs
22935-DIN
CAT50x3/8xDIN
15 ft/lbs
22936-8
CAT50x3/8x8
15 ft/lbs
22937
CAT50x1/2x4
20 ft/lbs
22937-2 5/8
CAT50x1/2x2-5/8
20 ft/lbs
22937-6
CAT50x1/2x6
20 ft/lbs
22937-8
CAT50x1/2x8
20 ft/lbs
22937-DIN
CAT50x1/2xDIN
20 ft/lbs
22939
CAT50x5/8x4
35 ft/lbs
22939-1.44
CAT50x5/8x1.44
35 ft/lbs
22939-3
CAT50x5/8x3
35 ft/lbs
22939-6
CAT50x5/8x6
35 ft/lbs
22939-8
CAT50x5/8x8
35 ft/lbs
22941
CAT50x3/4x4
45 ft/lbs
22941-1.44
CAT50x3/4x1.44
45 ft/lbs
22941-3
CAT50x3/4x3
45 ft/lbs
22941-5.75
CAT50x3/4x5.75
45 ft/lbs
22941-6
CAT50x3/4x6
45 ft/lbs
22941-8
CAT50x3/4x8
45 ft/lbs
22941-DIN
CAT50x3/4xDIN
45 ft/lbs
22943
CAT50x7/8x4
45 ft/lbs
22945
CAT50x1x4
70 ft/lbs
22945-2.62
CAT50x1x2.62
70 ft/lbs
22945-6
CAT50x1x6
70 ft/lbs
22945-DIN
CAT50x1xDIN
70 ft/lbs
22946-8
CAT50x1x8
70 ft/lbs
22947
CAT50x1-1/4x4.6
70 ft/lbs
22947-2.62
CAT50x1-1/4x2.62
70 ft/lbs
22947-6
CAT50x1-1/4x6
70 ft/lbs
22947-8
CAT50x1-1/4x8
70 ft/lbs
22947-DIN
CAT50x1-1/4xDIN
70 ft/lbs
22949
CAT50x1-1/2x4.6
70 ft/lbs
22949-2
CAT50x1-1/2x2
70 ft/lbs
22949-DIN
CAT50x1-1/2xDIN
70 ft/lbs
22951
CAT50x2x6
125 ft/lbs

BT 40 End Mill Holders

Part No. Description Torque
07140-1/8
BT40x1/8
4 ft/lbs
07140-3/16
BT40x3/16
6 ft/lbs
07140-1/4
BT40x1/4
6 ft/lbs
07140-5/16
BT40x5/16
10 ft/lbs
07140-3/8
BT40x3/8
15 ft/lbs
07140-1/2
BT40x1/2
20 ft/lbs
07140-5/8
BT40x5/8
35 ft/lbs
07140-3/4
BT40x3/4
45 ft/lbs
07140-1
BT40x1
70 ft/lbs
07140-1 1/4
BT40x1-1/4
70 ft/lbs
07140-1 1/2
BT40x1-1/2
70 ft/lbs

BT 50 End Mill Holders

Part No.
Description
Torque
07150-1/4
BT50x1/4
6 ft/lbs
07150-3/8
BT50x3/8
15 ft/lbs
07150-1/2
BT50x1/2
20 ft/lbs
07150-5/8
BT50x5/8
35 ft/lbs
07150-3/4
BT50x3/4
45 ft/lbs
07150-1
BT50x1
70 ft/lbs
07150-1-6
BT50x1x6
70 ft/lbs
07150-1-1/4
BT50x1-1/4
70 ft/lbs