ER Spring Collet
BT / NT Series

ER Spring Collets
Product Name : ER Spring Collet
BT / NT Series
Product Description
Specifications of ER Spring Collets
Inquiry
  • DIN 6499 / ISO 15488 collet must be assembled into the clamping nut before inserting it into the chuck.

Metric Size

Model No.DLdWeight (kg)
ER08 8.5 13.5 1,1.5,2,2.5,3,3.5,4,4.5,5 0.01
ER11 11.5 18 1,1.5,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7 0.01
ER16 17 27 1,1.5,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9,9.5,10 0.03
ER20 21 31 1,1.5,2,2.5,3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9,9.5,10,10.5,11,11.5,12,12.5,13 0.04
ER25 26 35 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 0.07
ER32 33 40 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20 0.15
ER40 41 46 3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26 0.27
ER50 52 60 12,14,16,18,20,22,24,26,28,30,32,34 0.45

Unit: mm

Inch Size

Model No.DLdWeight (kg)
ER11 11.5 18 1/8,5/32,3/16,7/32,1/4 0.01
ER16 17 27 1/8,5/32,3/16,7/32,1/4,9/32,5/16,11/32,3/8 0.03
ER20 21 31 1/8,5/32,3/16,7/32,1/4,9/32,5/16,11/32,3/8,13/32,7/16,1/2 0.04
ER25 26 35 1/8,5/32,3/16,7/32,1/4,9/32,5/16,11/32,3/8,7/16,15/32,1/2,9/16,19/32,5/8 0.07
ER32 33 40 1/8,5/32,3/16,7/32,1/4,5/16,11/32,3/8,7/16,15/32,1/2,17/32,9/16,5/18,21/32,11/16,3/4,25/32 0.15
ER40 41 46 1/8,5/32,3/16,1/4,9/32,5/16,3/8,7/16,15/32,1/2,9/16,5/8,19/32,11/16,23/32,3/4,25/32,13/16,27/32,7/8,15/16,31/32,1 0.27

Unit: mm

ER08ER11ER16ER20
No.RangeNo.RangeNo.RangeNo.Range
ER08-01 1.0 ER11-01 1.0 ER16-01 1.0~0.5 ER20-01 1.0~0.5
ER08-1.5 1.5 ER11-1.5 1.5 ER16-1.5 1.5~1.0 ER20-1.5 1.5~1.0
ER08-02 2.0~1.5 ER11-02 2.0~1.5 ER16-02 2.0~1.0 ER20-02 2.0~1.0
ER08-2.5 2.5~2.0 ER11-2.5 2.5~2.0 ER16-2.5 2.5~2.0 ER20-2.5 2.5~2.0
ER08-03 3.0~2.5 ER11-03 3.0~2.5 ER16-03 3.0~2.0 ER20-03 3.0~2.0
ER08-3.5 3.5~3.0 ER11-3.5 3.5~3.0 ER16-3.5 3.5~3.0 ER20-3.5 3.5~3.0
ER08-04 4.0~3.5 ER11-04 4.0~3.5 ER16-04 4.0~3.0 ER20-04 4.0~3.0
ER08-4.5 4.5~4.0 ER11-4.5 4.5~4.0 ER16-4.5 4.5~4.0 ER20-4.5 4.5~4.0
ER08-05 5.0~4.5 ER11-05 5.0~4.5 ER16-05 5.0~4.0 ER20-05 5.0~4.0
ER11-5.5 5.5~5.0 ER16-5.5 5.5~5.0 ER20-5.5 5.5~5.0
ER11-06 6.0~5.5 ER16-06 6.0~5.0 ER20-06 6.0~5.0
ER11-6.5 6.5~6.0 ER16-6.5 6.5~6.0 ER20-6.5 6.5~6.0
ER11-07 7.0~6.5 ER16-07 7.0~6.0 ER20-07 7.0~6.0
ER16-7.5 7.5~7.0 ER20-7.5 7.5~7.0
ER16-08 8.0~7.0 ER20-08 8.0~7.0
ER16-8.5 8.5~8.0 ER20-8.5 8.5~8.0
ER16-09 9.0~8.0 ER20-09 9.0~8.0
ER16-9.5 9.5~9.0 ER20-9.5 9.5~9.0
ER16-10 10~9.0 ER20-10 10~9.0
ER20-10.5 10.5~10
ER20-11 11~10
ER20-11.5 11.5~11
ER20-12 12~11
ER20-12.5 12.5~12
ER20-13 13~12
ER25ER32ER40ER50
No.RangeNo.RangeNo.RangeNo.Range
ER25-02 2.0~1.0 ER32-02 2.0~1.0 ER40-03 3.0~2.0 ER50-12 12~10
ER25-03 3.0~2.0 ER32-03 3.0~2.0 ER40-04 4.0~3.0 ER50-14 14~12
ER25-04 4.0~3.0 ER32-04 4.0~3.0 ER40-05 5.0~4.0 ER50-16 16~14
ER25-05 5.0~4.0 ER32-05 5.0~4.0 ER40-06 6.0~5.0 ER50-18 18~16
ER25-06 6.0~5.0 ER32-06 6.0~5.0 ER40-07 7.0~6.0 ER50-20 20~18
ER25-07 7.0~6.0 ER32-07 7.0~6.0 ER40-08 8.0~7.0 ER50-22 22~20
ER25-08 8.0~7.0 ER32-08 8.0~7.0 ER40-09 9.0~8.0 ER50-24 24~22
ER25-09 9.0~8.0 ER32-09 9.0~8.0 ER40-10 10~9.0 ER50-26 26~24
ER25-10 10~9.0 ER32-10 10~9.0 ER40-11 11~10 ER50-28 28~26
ER25-11 11~10 ER32-11 11~10 ER40-12 12~11 ER50-30 30~28
ER25-12 12~11 ER32-12 12~11 ER40-13 13~12 ER50-32 32~30
ER25-13 13~12 ER32-13 13~12 ER40-14 14~13 ER50-34 34~32
ER25-14 14~13 ER32-14 14~13 ER40-15 15~14
ER25-15 15~14 ER32-15 15~14 ER40-16 16~15
ER25-16 16~15 ER32-16 16~15 ER40-17 17~16
ER32-17 17~16 ER40-18 18~17
ER32-18 18~17 ER40-19 19~18
ER32-19 19~18 ER40-20 20~19
ER32-20 20~19 ER40-21 21~20
ER40-22 22~21
ER40-23 23~22
ER40-24 24~23
ER40-25 25~24
ER40-26 26~25
  • (Suggested clamping range should be 0.5mm)