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    China Suppliers Factory ER Spring Collet Chuck, HSK-A, BT, SK, ER Collets & Clamping Nuts
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    China Suppliers Factory ER Spring Collet Chuck, HSK-A, BT, SK, ER Collets & Clamping Nuts

    Discover our premium range of Spring Collet Chucks, including the HSK-A-ER, BT-ER, and SK-ER models, designed for optimal performance in precision machining. Our ER Collets, featuring options such as ER-C Sealing Collet and ER-G Tapping Collet, provide exceptional grip and reliability. Complete your setup with our durable Clamping Nut for ER Collet Chucks. As a leading manufacturer and supplier in China, our factory ensures top-quality products crafted to meet diverse industrial needs. Elevate your machining capabilities with our high-performance collet solutions today!

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      Product Detail

      HSK-A-ER Spring Collet Chuck
      HSK-A-ER Spring Collet Chuck 1@4xHSK-A-ER Spring Collet Chuck 2@4x
      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.
      ★ Feature:
      • Balanced: G6.3; 15,000 rpm.
      BT-ER Spring Collet Chuck
      BT-ER Spring Collet Chuck-1@4xBT-ER Spring Collet Chuck-2@4x
      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-1@4xSK-ER Spring Collet Chuck-2@4x
      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 (1)ER (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 (7)ER (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 (5)
      ⓘ 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 (1)ER (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.
      ★ Stock Accuracy:
      • In stock with accuracy ≤ 0.015 mm
      Clamping Nut For ER Collet Chuck
      ER (3)ER (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
      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 spindle interface standards. HSK-A uses a hollow taper shank for high-speed and high-precision applications. BT (MAS-BT) is a dual-contact taper shank widely used in CNC machining centers. SK uses a steep taper shank suitable for conventional milling machines. 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 fix screw specification used to secure the collet chuck assembly. As noted in the product notice, axial fix screws, collets, and wrenches must be ordered separately and are not included with the collet chuck body.
      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), Grade A (≤0.01 mm), and Grade UP (≤0.005 mm). Standard stock items are supplied in Grade A (≤0.01 mm). Grade UP collets are available upon special request for ultra-precision applications.
      QWhat is the purpose of ER-C Sealing Collets compared to standard ER Collets?
      ER-C Sealing Collets are designed for through-coolant applications. Unlike standard ER collets which have a 1 mm clamping range per collet, ER-C sealing collets clamp a single fixed diameter (e.g., 3.0, 4.0, 5.0 mm) and provide a sealed interface to allow coolant to be delivered directly through the tool shank to the cutting edge, improving cooling and chip evacuation.
      QWhat is the balancing specification for the HSK-A-ER Spring Collet Chuck?
      The HSK-A-ER Spring Collet Chuck is balanced to G6.3 at 15,000 rpm. This balancing grade ensures smooth and stable operation at high rotational speeds, minimizing vibration and extending both tool life and spindle life in high-speed machining applications.
      QHow do I select the correct clamping nut for an ER collet chuck?
      Clamping nuts are selected based on the ER collet size. For example, CNA-ER16 fits ER16 collets with thread M22XP1.5, while CNU-M/RD-ER32 fits ER32 collets with thread M40XP1.5. The figure type (A, B, or C) indicates the nut style — Type A and B are standard hex/round nuts, while Type C (CNM series) is a mini nut design for compact applications with restricted space.

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