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    ER Spring Collet Chuck and Accessories from China's Leading Suppliers and Factory - HSK, BT, SK, ER Collets
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    ER Spring Collet Chuck and Accessories from China's Leading Suppliers and Factory - HSK, BT, SK, ER Collets

    Discover our range of high-quality HSK-A-ER Spring Collet Chucks, BT-ER Spring Collet Chucks, and SK-ER Spring Collet Chucks, designed for precise tool holding and enhanced machining performance. Our ER Collets offer exceptional grip and stability, ensuring optimal results in various applications. We also provide specialized ER-C Sealing Collets for improved sealing capabilities and ER-G Tapping Collets for efficient tapping operations. Additionally, our Clamping Nuts for ER Collet Chucks are built to deliver reliable performance. As a leading China supplier and factory, we are committed to delivering superior products that meet your machining needs. Enhance your operations with our trusted collet solutions today!

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      Product Detail

      HSK-A-ER Spring Collet Chuck

      HSK-A-ER Spring Collet Chuck 1HSK-A-ER Spring Collet Chuck 2
      Specification D D1 d L T Weight
      HSK40A-ER20-80 34 34 20 80 - 0.50
      HSK40A-ER25-80 42 42 25 80 - 0.56
      HSK40A-ER32-105 50 50 32 105 - 1.01
      HSK50A-ER16-75 28 28 16 75 - 0.54
      HSK50A-ER16-100 28 28 16 100 M100F200 0.65
      HSK50A-ER20-75 34 34 20 75 - 0.61
      HSK50A-ER20-100 34 34 20 100 M120F200 0.77
      HSK50A-ER25-80 42 42 25 80 - 0.75
      HSK50A-ER25-100 42 42 25 100 M160F200 0.94
      HSK50A-ER25-135 42 42 25 135 M160F400 1.28
      HSK50A-ER32-100 50 50 32 100 - 1.07
      HSK50A-ER32-135 50 50 32 135 M160F200 1.57
      HSK50A-ER32-160 50 50 32 160 M160F400 2.00
      HSK63A-ER16-75 28 28 16 75 - 0.80
      HSK63A-ER16-100 28 28 16 100 M100F200 0.91
      HSK63A-ER16-120 28 28 16 120 M100F350 0.96
      HSK63A-ER16-160 28 28 16 160 M100F350 1.17
      HSK63A-ER20-80 34 34 20 80 - 0.90
      HSK63A-ER20-100 34 34 20 100 M120F200 1.03
      HSK63A-ER20-120 34 34 20 120 M120F200 1.15
      HSK63A-ER20-160 34 34 20 160 M120F400 1.42
      HSK63A-ER25-80 42 42 25 80 - 1.03
      HSK63A-ER25-100 42 42 25 100 - 1.22
      HSK63A-ER25-120 42 42 25 120 M160F200 1.42
      HSK63A-ER25-150 42 42 25 150 M160F400 1.71
      HSK63A-ER32-100 50 50 32 100 - 1.41
      HSK63A-ER32-125 50 50 32 125 M160F250 1.76
      HSK63A-ER32-160 50 50 32 160 M160F400 2.27
      HSK63A-ER40-100 63 63 40 100 - 1.76
      HSK63A-ER40-120 63 63 40 120 M200F200-P2 2.20
      HSK63A-ER40-160 63 63 40 160 M200F400-P2 3.08
      HSK100A-ER16-100 28 28 16 100 M100F200 2.25
      HSK100A-ER16-160 28 28 16 160 M100F350 2.52
      HSK100A-ER20-100 34 34 20 100 M120F200 2.37
      HSK100A-ER20-160 34 34 20 160 M120F400 2.76
      HSK100A-ER25-100 42 42 25 100 - 2.55
      HSK100A-ER25-160 42 42 25 160 M160F400 3.13
      HSK100A-ER25-200 42 42 25 200 M160F400 3.53
      HSK100A-ER32-100 50 50 32 100 - 2.75
      HSK100A-ER32-160 50 50 32 160 M160F400 3.59
      HSK100A-ER32-200 50 50 32 200 M160F400 4.18
      HSK100A-ER40-100 63 63 40 100 - 3.19
      HSK100A-ER40-160 63 63 40 160 M200F400-P2 4.51
      HSK100A-ER40-200 63 63 40 200 M200F400-P2 5.45
      ⓘ Notice: "T" Axial fix screw, collets and wrenches shall be ordered separately.
      ■Balanced: G6.3; 15,000 rpm.

      BT-ER Spring Collet Chuck

      BT-ER Spring Collet Chuck 1BT-ER Spring Collet Chuck 2
      Specification Figure D D1 D2 d L T Weight
      BT30-ER16-70 A 28 28 - 16 70 M100F200 0.52
      BT30-ER16-100 A 28 28 - 16 100 M100F350 0.64
      BT30-ER16-120 A 28 28 - 16 120 M100F350 0.73
      BT30-ER20-70 A 34 34 - 20 70 M120F200 0.59
      BT30-ER20-100 A 34 34 - 20 100 M120F400 0.78
      BT30-ER20-135 A 34 34 - 20 135 M120F400 1.05
      BT30-ER25-70 A 42 42 - 25 70 M160F200 0.67
      BT30-ER25-100 A 42 42 - 25 100 M160F400 0.97
      BT30-ER25-135 A 42 42 - 25 135 M160F400 1.30
      BT30-ER32-70 A 50 50 - 32 70 M160F200 0.75
      BT30-ER32-100 A 50 50 - 32 100 M160F400 1.18
      BT30-ER40-95 A 63 63 - 40 95 M200F200-P2 1.21
      BT40-ER16-70 A 28 28 - 16 70 M100F350 1.10
      BT40-ER16-100 A 28 28 - 16 100 M100F350 1.19
      BT40-ER16-125 A 28 28 - 16 125 M100F350 1.30
      BT40-ER16-150 A 28 28 - 16 150 M100F350 1.44
      BT40-ER20-70 A 34 34 - 20 70 M120F200 1.22
      BT40-ER20-100 A 34 34 - 20 100 M120F400 1.33
      BT40-ER20-125 A 34 34 - 20 125 M120F400 1.50
      BT40-ER20-150 A 34 34 - 20 150 M120F400 1.66
      BT40-ER25-70 A 42 42 - 25 70 M160F200 1.22
      BT40-ER25-100 A 42 42 - 25 100 M160F400 1.49
      BT40-ER25-125 A 42 42 - 25 125 M160F400 1.71
      BT40-ER25-150 A 42 42 - 25 150 M160F400 1.97
      BT40-ER32-70 A 50 50 - 32 70 M160F200 1.27
      BT40-ER32-100 A 50 50 - 32 100 M160F400 1.70
      BT40-ER32-150 A 50 50 - 32 150 M160F400 2.39
      BT40-ER32-200 A 50 50 - 32 200 M160F400 3.12
      BT40-ER40-80 A 63 63 - 40 80 M200F200-P2 1.66
      BT40-ER40-100 A 63 63 - 40 100 M200F400-P2 2.10
      BT40-ER40-120 A 63 63 - 40 125 M200F400-P2 2.60
      BT40-ER40-150 A 63 63 - 40 150 M200F400-P2 3.30
      BT50-ER16-70 A 28 28 - 16 70 M100F350 3.72
      BT50-ER16-100 A 28 28 - 16 100 M100F350 3.85
      BT50-ER16-135 A 28 28 - 16 135 M100F350 3.95
      BT50-ER16-165 A 28 28 - 16 165 M100F350 4.04
      BT50-ER20-70 A 34 34 - 20 70 M120F400 3.73
      BT50-ER20-100 A 34 34 - 20 100 M120F400 3.92
      BT50-ER20-135 A 34 34 - 20 135 M120F400 4.15
      BT50-ER20-150 A 34 34 - 20 150 M120F400 4.25
      BT50-ER20-200 A 34 34 - 20 200 M120F400 4.66
      BT50-ER20-250L B 34 34 47 20 250 M120F400 5.26
      BT50-ER25-70 A 42 42 - 25 70 M160F400 3.75
      BT50-ER25-100 A 42 42 - 25 100 M160F400 4.02
      BT50-ER25-125 A 42 42 - 25 125 M160F400 4.26
      BT50-ER25-150 A 42 42 - 25 150 M160F400 4.54
      BT50-ER25-200 A 42 42 - 25 200 M160F400 5.01
      BT50-ER25-250L B 42 42 54 25 250 M160F400 5.89
      BT50-ER32-80 A 50 50 - 32 80 M160F400 3.91
      BT50-ER32-100 A 50 50 - 32 100 M160F400 4.07
      BT50-ER32-120 A 50 50 - 32 120 M160F400 4.35
      BT50-ER32-150 A 50 50 - 32 150 M160F400 4.82
      BT50-ER32-200 A 50 50 - 32 200 M160F400 5.32
      BT50-ER32-250 A 50 50 - 32 250 M160F400 5.92
      BT50-ER32-300 A 50 50 - 32 300 M160F400 6.90
      BT50-ER40-80 A 63 63 - 40 80 M200F400-P2 4.04
      BT50-ER40-100 A 63 63 - 40 100 M200F400-P2 4.48
      BT50-ER40-120 A 63 63 - 40 120 M200F400-P2 4.96
      BT50-ER40-150 A 63 63 - 40 150 M200F400-P2 5.51
      BT50-ER40-200 A 63 63 - 40 200 M200F400-P2 6.72
      ⓘ Notice: "T" Axial fix screw, collets and wrenches shall be ordered separately.

      SK-ER Spring Collet Chuck

      SK-ER Spring Collet Chuck 1SK-ER Spring Collet Chuck 2
      Specification D D1 d L T Weight
      SK30-ER11-60 19 19 11 60 M060F200 0.45
      SK30-ER16-70 28 28 16 70 M100F200 0.67
      SK30-ER16-100 28 28 16 100 M100F350 0.80
      SK30-ER20-70 34 34 20 70 M120F200 0.79
      SK30-ER20-100 34 34 20 100 M120F400 0.99
      SK30-ER25-70 42 42 25 70 M160F200 0.68
      SK30-ER32-70 50 50 32 70 M160F200 0.72
      ER11-80 19 19 11 80 M060F200 0.93
      ER11-125 19 19 11 125 M060F200 1.02
      ER16-70 28 28 16 70 M100F350 0.96
      ER16-100 28 28 16 100 M100F350 1.11
      ER16-125 28 28 16 125 M100F350 1.22
      ER16-150 28 28 16 150 M100F350 1.33
      ER20-70 34 34 20 70 M120F200 1.03
      ER20-100 34 34 20 100 M120F400 1.24
      ER20-135 34 34 20 135 M120F400 1.46
      ER20-160 34 34 20 160 M120F400 1.56
      ER25-70 42 42 25 70 M160F200 1.13
      ER25-100 42 42 25 100 M160F400 1.41
      ER25-150 42 42 25 150 M160F400 1.90
      ER25-200 42 42 25 200 M160F400 2.38
      ER32-70 50 50 32 70 M160F200 1.21
      ER32-100 50 50 32 100 M160F400 1.64
      ER32-150 50 50 32 150 M160F400 2.34
      ER40-80 63 63 40 80 M200F200-P2 1.53
      ER40-100 63 63 40 100 M200F400-P2 1.95
      ER40-135 63 63 40 135 M200F400-P2 2.75
      ER16-100 28 28 16 100 M100F350 2.93
      ER16-135 28 28 16 135 M100F350 3.08
      ER16-160 28 28 16 160 M100F350 3.20
      ER16-200 28 28 16 200 M100F350 3.37
      ER20-100 34 34 20 100 M120F400 3.07
      ER20-135 34 34 20 135 M120F400 3.28
      ER20-160 34 34 20 160 M120F400 3.44
      ER25-70 42 42 25 70 M160F400 2.96
      ER25-100 42 42 25 100 M160F400 3.24
      ER25-150 42 42 25 150 M160F400 3.72
      ER25-200 42 42 25 200 M160F400 4.20
      ER32-80 50 50 32 80 M160F400 3.10
      ER32-120 50 50 32 120 M160F400 3.75
      ER32-160 50 50 32 160 M160F400 4.32
      ER32-200 50 50 32 200 M160F400 4.89
      ER40-80 63 63 40 80 M200F400-P2 3.45
      ER40-120 63 63 40 120 M200F400-P2 4.38
      ER40-160 63 63 40 160 M200F400-P2 5.27
      ER40-200 63 63 40 200 M200F400-P2 6.17
      ⓘ Notice: "T" Axial fix screw, collets and wrenches shall be ordered separately.

      ER Collet

      ER Collet 1ER Collet 6
      Specification
      ER11-13PCS ER16-10PCS ER20-12PCS ER25-15PCS ER32-19PCS ER40-24PCS
      SET NO. RANGE mm SET NO. RANGE mm SET NO. RANGE mm SET NO. RANGE mm SET NO. RANGE mm SET NO. RANGE mm
      ER11- 1 1.0-0.5 ER16- 1 1.0-0.5 ER20-12PCS 2 2.0-1.0 ER25- 2 2.0-1.0 ER32-19PCS 2 2.0-1.0 ER40- 3 3.0-2.0
      1.5 1.5-1.0 2 2.0-1.0 3 3.0-2.0 3 3.0-2.0 3 3.0-2.0 4 4.0-3.0
      2 2.0-1.5 3 3.0-2.0 4 4.0-3.0 4 4.0-3.0 4 4.0-3.0 5 5.0-4.0
      2.5 2.5-2.0 4 4.0-3.0 5 5.0-4.0 5 5.0-4.0 5 5.0-4.0 6 6.0-5.0
      3 3.0-2.5 5 5.0-4.0 6 6.0-5.0 6 6.0-5.0 6 6.0-5.0 7 7.0-6.0
      3.5 3.5-3.0 6 6.0-5.0 7 7.0-6.0 7 7.0-6.0 7 7.0-6.0 8 8.0-7.0
      4 4.0-3.5 7 7.0-6.0 8 8.0-7.0 8 8.0-7.0 8 8.0-7.0 9 9.0-8.0
      4.5 4.5-4.0 8 8.0-7.0 9 9.0-8.0 9 9.0-8.0 9 9.0-8.0 10 10-9.0
      5 5.0-4.5 9 9.0-8.0 10 10-9.0 10 10-9.0 10 10-9.0 11 11-10
      5.5 5.5-5.0 10 10-9.0 11 11-10 11 11-10 11 11-10 12 12-11
      6 6.0-5.5 12 12-11 12 12-11 12 12-11 13 13-12
      6.5 6.5-6.0 13 13-12 13 13-12 13 13-12 14 14-13
      7 7.0-6.5 14 14-13 14 14-13 15 14-14
      15 15-14 15 15-14 16 16-15
      16 16-15 16 16-15 17 17-16
      17 17-16 18 18-17
      18 18-17 19 19-18
      Specification D L 19 19-18 20 20-19
      ER 11 11.5 18 20 20-19 21 21-20
      16 17 27.5 22 22-21
      20 21 31.5 23 23-22
      25 26 34 24 24-23
      32 33 40 25 25-24
      40 41 46 26 26-25
      ⓘ Note: ER 11-13PCS is a set.
      Spring Collet Precision:
      ■A: ≤ 0.01 mm
      ■UP: ≤ 0.005 mm
      ★ Remark: ER collets in stock with A grade.

      ER-C Sealing Collet

      ER-C Sealing Collet 7ER-C Sealing Collet 6
      Specification
      ER16-8PCS-C ER20-11PCS-C ER25-14PCS-C ER32-18PCS-C ER40-24PCS-C
      SET NO. RANGE mm SET NO. RANGE mm SET NO. RANGE mm SET NO. RANGE mm SET NO. RANGE mm
      ER16- 3-C 3.0 ER20- 3-C 3.0 ER25- 3-C 3.0 ER32- 3-C 3.0 ER40- 3-C 3.0
      4-C 4.0 4-C 4.0 4-C 4.0 4-C 4.0 4-C 4.0
      5-C 5.0 5-C 5.0 5-C 5.0 5-C 5.0 5-C 5.0
      6-C 6.0 6-C 6.0 6-C 6.0 6-C 6.0 6-C 6.0
      7-C 7.0 7-C 7.0 7-C 7.0 7-C 7.0 7-C 7.0
      8-C 8.0 8-C 8.0 8-C 8.0 8-C 8.0 8-C 8.0
      9-C 9.0 9-C 9.0 9-C 9.0 9-C 9.0 9-C 9.0
      10-C 10.0 10-C 10.0 10-C 10.0 10-C 10.0 10-C 10.0
      11-C 11.0 11-C 11.0 11-C 11.0 11-C 11.0
      12-C 12.0 12-C 12.0 12-C 12.0 12-C 12.0
      12-C 13.0 13-C 13.0 13-C 13.0 13-C 13.0
      14-C 14.0 14-C 14.0 14-C 14.0
      15-C 15.0 15-C 15.0 15-C 15.0
      16-C 16.0 16-C 16.0 16-C 16.0
      17-C 17.0 17-C 17.0
      18-C 18.0 18-C 18.0
      19-C 19.0 19-C 19.0
      20-C 20.0 20-C 20.0
      Specification D L 21-C 21.0
      ER 16-C 17 27.5 22-C 22.0
      20-C 21 31.5 23-C 23.0
      25-C 26 34 24-C 24.0
      32-C 33 40 25-C 25.0
      40-C 41 46 26-C 26.0
      ER-C Sealing Collet Diagram
      ⓘ Note: ER16-8PCS-C is a set.
      Spring Collet Precision:
      ■Standard: ≤ 0.015 mm
      ■A: ≤ 0.01 mm
      ■UP: ≤ 0.005 mm
      ★ Remark: ER collets in stock with A grade.

      ER-G Tapping Collet

      ER-G Tapping Collet 1ER-G Tapping Collet 4
      Specification d k ISO529(1) ISO529(2) JIS DIN371 DIN376
      ER16- 0224018G 2.24 1.8 - M3 - - -
      ER16- 028021G 2.8 2.1 - - - - M4
      ER16- 0315025G 3.15 2.5 M3 M4 - M3 M4.5、M5
      ER16- 035027G 3.5 2.7 - - - T04-L 1.35
      ER16- ER20- 040032G 4 3.2 M4 M5 M3、W1/8 - -
      ER16- ER20- ER25- 045034G 4.5 3.4 - - - M4 M6
      ER16- ER20- ER25- 0450355G 4.5 3.55 - M6 - - -
      ER16- ER20- ER25- 050040G 5 4 M5 - M4 - -
      ER16- ER20- ER25- 055045G 5.5 4.5 - - M5、W3/16 - -
      ER16- ER20- ER25- 060045G 6 4.5 - - M6、W1/4 - -
      ER16- ER20- ER25- 060049G 6 4.9 - - - M4.5、M5、M6 M8
      ER16- ER20- ER25- 061050G 6.1 5 - - W5/16 - -
      ER16- ER20- ER25- 062050G 6.2 5 - - M8 - -
      ER16- ER20- ER25- 063050G 6.3 5 M6 M8 - - -
      ER16- ER20- ER25- ER32- 070055G 7 5.5 - - M10、W3/8 M7 M9、10
      ER16- ER20- ER25- ER32- 080060G 8 6 - - W7/16、PT1/8 - -
      ER16- ER20- ER25- ER32- 080062G 8 6.2 - - - M8 M11
      ER16- ER20- ER25- ER32- 080063G 8 6.3 M8 M10 - - -
      ER16- ER20- ER25- ER32- 085065G 8.5 6.5 - - M12 - -
      ER16- ER20- ER25- ER32- 090070G 9 7 - - W1/2 M9 M12
      ER16- ER20- ER25- ER32- 090071G 9 7.1 - M12 - - -
      ER16- ER20- ER25- ER32- ER40- 100080G 10 8 M10 - - M10 -
      ER20- ER25- ER32- ER40- 105080G 10.5 8 - - M14 - -
      ER20- ER25- ER32- ER40- 110090G 11 9 - - PT1/4 - M14
      ER20- ER25- ER32- ER40- 112090G 11.2 9 - M14 - - -
      ER20- ER25- ER32- ER40- 120090G 12 9 - - W5/8 - M16
      ER20- ER25- ER32- ER40- 125100G 12.5 10 - M16 M16 - -
      ER25- ER32- ER40- 140110G 14 11 - - M18、W3/4、PT3/8 - M18
      ER25- ER32- ER40- 140112G 14 11.2 - M18、M20 M18 - -
      ER25- ER32- ER40- 150120G 15 12 - - M20 - -
      ER32- ER40- 160120G 16 12 - - - - M20
      ER32- ER40- 160125G 16 12.5 - M22 - - -
      ER32- ER40- 170130G 17 13 - - M22、W7/8 - -
      ER32- ER40- 180140G 18 14 - M24 PT1/2 - -
      ER32- ER40- 180145G 18 14.5 - - - - M22、M24
      ER32- ER40- 190150G 19 15 - - M24 - -
      ER40- 200150G 20 15 - - M27、W1、PT5/8 - -
      ER40- 200160G 20 16 - M27、M30 - - M27
      ER40- 220180G 22 18 - - - - M30
      ER40- 220190G 22 19 - - M30、M33 - -
      ER40- 224180G 22.4 18 - M33 - - -
      ER40- 130170G 23 17 - - M30、PT3/4 - -
      ER40- 250190G 25 19 - - M33 - -
      ⓘ Note: The size of the shank must be suitable with the collet.
      ■In stock with accuracy ≤ 0.015 mm

      Clamping Nut For ER Collet Chuck

      Clamping Nut For ER Collet Chuck 3Clamping Nut For ER Collet Chuck 2
      Specification Figure D L T
      CNA-ER11 A 19 12.5 M14XP0.75
      CNA-ER16 A 28 17.5 M22XP1.5
      CNA-ER20 A 34 19 M25XP1.5
      CNU-M/RD-ER25 B 42 20 M32XP1.5
      CNU-M/RD-ER32 B 50 22.5 M40XP1.5
      CNU-M/RD-ER40 B 63 25.5 M50XP1.5
      CNM-ER11 C 16 12 M13XP0.75
      CNM-ER16 C 22 18 M19XP1.0
      CNM-ER20 C 28 19 M24XP1.0
      CNM-ER25 C 35 20 M30XP1.0
      ❓ Frequently Asked Questions (FAQ)
      QWhat is the difference between HSK-A-ER, BT-ER, and SK-ER spring collet chucks?
      HSK-A-ER, BT-ER, and SK-ER refer to different taper shank interface standards. HSK-A uses a hollow taper shank for high-speed machining with superior rigidity. BT (MAS-BT) is a dual-contact taper system widely used in conventional CNC machining centers. SK (DIN69871/ISO7388) is a single-contact taper commonly used in European and general-purpose machining. All three types accept standard ER collets for versatile tool clamping.
      QWhat does the "T" column mean in the specification table, and do I need to order it separately?
      The "T" column refers to the axial fixing screw specification used to secure the collet chuck. Items marked with a dash (-) do not require an axial fix screw. Where a value is listed (e.g., M100F200), it indicates the compatible screw specification. Per the product notice, axial fix screws, collets, and wrenches must be ordered separately and are not included with the chuck body.
      QWhat is the difference between ER collets (standard) and ER-C sealing collets?
      Standard ER collets clamp tools within a 1mm range and are suitable for general milling, drilling, and reaming operations. ER-C sealing collets are designed to hold tools at a fixed diameter (no range), providing a sealed interface that allows coolant to pass through the collet for through-coolant machining applications. ER-C collets are ideal when coolant delivery through the spindle and toolholder is required.
      QWhat precision grades are available for ER collets, and which grade is in stock?
      ER collets are available in three precision grades: Standard (≤ 0.015 mm runout), Grade A (≤ 0.01 mm runout), and Grade UP (≤ 0.005 mm runout). Standard stock items are supplied in Grade A (≤ 0.01 mm). Grade UP collets are available for high-precision applications and may require separate ordering. Please contact us for availability of UP grade collets.
      QWhat is the purpose of ER-G tapping collets, and how do I select the correct one?
      ER-G tapping collets are specially designed to hold taps and provide the correct square drive (k dimension) that matches the tap shank. To select the correct ER-G collet, match the tap shank diameter (d) and square drive size (k) to the appropriate collet specification. The table also cross-references compatibility with ISO529, JIS, DIN371, and DIN376 tap standards to help you identify the correct collet for your tap type. Note that the tap shank size must be compatible with the selected collet.
      QWhat types of clamping nuts are available for ER collet chucks, and how do I choose the right one?
      Three types of clamping nuts are available: Type A (CNA series) — standard hex-style nuts for ER11 to ER20; Type B (CNU-M/RD series) — mini/round-style nuts for ER25 to ER40, suitable for applications with limited clearance; Type C (CNM series) — compact mini nuts for ER11 to ER25, ideal for tight spaces. Select the nut type based on your ER collet size and the clearance available in your machining environment. Always match the thread specification (T column) to ensure correct fitment.

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