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System of Measurement
Inch
Metric
Collet Size
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1/32"
3/64"
3/64"
to
63/64"
1/16"
1/16"
to
5/32"
1/16"
to
1/4"
1/16"
to
3/8"
5/64"
3/32"
3/32"
to
1/4"
3/32"
to
13/32"
3/32"
to
1/2"
3/32"
to
5/8"
3/32"
to
3/4"
7/64"
1/8"
1/8"
to
5/32"
1/8"
to
3/8"
1/8"
to
3/4"
9/64"
5/32"
11/64"
3/16"
3/16"
to
13/32"
3/16"
to
1/2"
3/16"
to
5/8"
3/16"
to
3/4"
13/64"
7/32"
15/64"
1/4"
17/64"
9/32"
19/64"
5/16"
21/64"
11/32"
23/64"
3/8"
25/64"
13/32"
13/32"
to
7/8"
27/64"
7/16"
7/16"
to
7/8"
29/64"
15/32"
31/64"
1/2"
1/2"
to 1"
1/2"
to 1
1/4"
33/64"
17/32"
35/64"
9/16"
37/64"
19/32"
39/64"
5/8"
41/64"
21/32"
43/64"
11/16"
45/64"
23/32"
47/64"
3/4"
49/64"
25/32"
51/64"
13/16"
53/64"
27/32"
55/64"
7/8"
57/64"
29/32"
59/64"
15/16"
61/64"
31/32"
63/64"
1"
1" to 1
1/16"
1
1/64"
1
1/32"
1
3/64"
1
1/16"
1
5/64"
1
3/32"
1
7/64"
1
1/8"
1
3/16"
1
1/4"
1
3/8"
1
1/2"
1
5/8"
1 mm
1 mm to 2 mm
1 mm to 5 mm
1.5 mm
1.5 mm to 7 mm
2 mm
2 mm to 4 mm
3 mm
3 mm to 4 mm
3 mm to 10 mm
3 mm to 13 mm
3 mm to 16 mm
3 mm to 20 mm
3.5 mm
4 mm
4 mm to 26 mm
5 mm
5 mm to 10 mm
5 mm to 13 mm
5 mm to 16 mm
5 mm to 20 mm
5.5 mm to 7 mm
6 mm
6 mm to 18 mm
7 mm
8 mm
9 mm
10 mm
10.5 mm
11 mm
11 mm to 20 mm
12 mm
13 mm
13.5 mm
14 mm
15 mm
16 mm
17 mm
18 mm
19 mm
19.5 mm
20 mm
20 mm to 34 mm
21 mm
22 mm
23 mm
24 mm
25 mm
26 mm
Collet Type
5C
ER-8
ER-11
ER-16
ER-20
ER-25
ER-32
ER-40
R8
Grip Range
4 mm to 5 mm
4.5 mm to 5 mm
For Holding
Boring Bars
Burs
Counterbores
Countersinks
Drill Bits
End Mills
Grinding Bits
Reamers
Router Bits
Thread Mills
Workpieces
Face Type
Round
Material
52100 Alloy Steel
Chrome-Moly Steel
Steel
For Use With
CNC Lathes
CNC Machines
Drill Presses
Lathes
Milling Machines
Routers
Total Indicated Runout (TIR) Accuracy
0.0002"
0.0008"
DFARS Specialty Metals
Exempt
Export Control Classification Number (ECCN)
EAR99
Overall Length
0.51"
0.71"
1.06"
1.08"
1.22"
1.24"
1.34"
1.57"
1.81"
3.27"
4.089"
4.134"
REACH
Compliant
Not Compliant
RoHS
Compliant
Not Compliant
U.S.–Mexico–Canada Agreement (USMCA) Qualifying
No
Body Diameter
0.95"
1
1/4"
Internal Thread Size
7/16"
-20
1.041"-24
Approximate Diameter Compression
1/64"
1/32"
Specifications Met
DIN 6499-B
ISO 15488 Form B
External Thread Size
1.238"-20
Length
0.51"
0.71"
1.06"
1.08"
1.22"
1.24"
1.34"
1.57"
1.81"
3.27"
4.089"
4.134"
Thread Size
7/16"
-20
1.041"-24
1.238"-20
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14 Products
Fabricating and Machining
Milling Machine Collets
Install in a milling machine collet chuck or holder to tightly grip tool bits
13 products
Lathe Collets
Insert into a lathe collet chuck or holder to tightly grip workpieces
1 product
The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)