Product description

  1. 0.0002" TIR or better

    3.93" OAL., 3/4" Straight Shank ER20 Collet Holder

    • Made of alloy steel.
    • Hardened & precision ground.
    • 0.0002" TIR or better.
    • Internal threaded shank.

  2. Materials

    • Made of alloy steel.
    • Hardened to HRC 56-60.
    • Precision ground.

  3. "Off-Centric" Design

    Feature of ER Collet Nut

    The Eccentric Ring complies with ISO 15488:2003(E) and secures ER collets.

  4. Shank Thread

    3/8"-16

Features:

Accusize 0223-0210 Straight Shank ER20 Collet Holder

  • For ER20 collets
  • Made from durable alloy steel.
  • Hardened to HRC 56-60 and precision ground.
  • TIR: 0.0002" or better.
  • Internal threaded straight shank.

  1. Diagram

    Specifications

     
    • OAL (L): 3.93", Shank Dia. (C): 3/4", Shank Length (L1): 2.50"
    • Flat-to-Flat Dimension (H): 0.90", Collet Nut Diameter (D): 1.34"
    • Shank Thread: 3/8"-16
    • Collet Capacity: 0.04"-0.511"

  2. Accuracy Inspection Cautions

     
    • Clean All Parts: Dirt or improper installation affects precision.
    • Check Spindle: Ensure your machine’s spindle is highly accurate.
    • Use Quality Collets: Many marked 0.0005" don’t meet the spec.
    • Overall Accuracy Depends: Low collet accuracy limits test results.

Attention: Eccentric Ring of the ER Collet Nut

Collet Nut's Eccentric Ring

The Eccentric Ring is designed per the requirements listed in ISO 15488:2003(E). It is to hold ER collets in place.

Assembly

  • Tilt and insert the collet partway into the nut.
  • Engage the ring into the collet's groove and press until fully seated.

Assembled

  • Tighten the nut lightly with the collet holder.
  • (Warning: never tighten the nut without a cutter in it as it will break)

Disassembly

  1. Take out the nut from the holder.
  2. Press the end of the ER collet until it disengages from its position.
  3. Push the collet out of the nut.

Auxiliary Tools

  1. Accusize 0223-0799 Precision ER20 Collet Set, inch

    • 12pcs/set
    • 1/16"-1/2"
    • Strong storage case

  2. Accusize 3350-0583 Precision ER20 Collet Set, mm

    • 12pcs/set
    • 2-13mm by 1mm
    • Strong storage case

Compare Accusize ER20 Collet Chucks

SKU

0223-0210

SKU

0223-0230

SKU

4001-8469

Shank Type

3/4" Dia., 2.50" Shank Length

Shank Type

R8

Shank Type

HSK63A Taper

TIR

.0002" or better

TIR

0.0002" O.D to I.D.

TIR

0.00012"

Collet Nut Style

Hex

Collet Nut Style

Hex

Collet Nut Style

Hex

Comes with Wrench?

No

Comes with Wrench?

No

Comes with Wrench?

No

Consider Accusize ER20 Collet Holders for CNC Machines

  1. CAT40 to ER20 Premium Floating Tap Collet Holder

    • For light-duty tapping tasks. TIR: 0.0004"
    • All critical surfaces are precision-ground.
    • Made from alloy steel, hardened to HRC 54-56.

  2. CAT40 to ER20, 2.76in, Collet Holder

    • All ground body. Made from alloy steel hardened to HRC 52-56.
    • Taper accurately ground exceeding AT3 standard.
    • Balanced to 20,000 RPM at G2.5. TIR: 0.00012"

  3. CAT40 to ER20, 4in, Collet Holder

    • All ground body. Made from alloy steel hardened to HRC 52-56.
    • Taper accurately ground exceeding AT3 standard.
    • Balanced to 20,000 RPM at G2.5. TIR: 0.00012"

  4. ISO40 to ER20 Collet Holder

    • Thread: 5/8"-11
    • Length: 100 mm
    • TIR: 0.00012"

  5. CAT50 to ER20 4" Proj. Length CNC ER Collet Holder

    • Constructed of alloy steel, hardened to HRC 52-56
    • Through-spindle coolant capability.
    • Collet seat taper TIR ≤ 0.0002"

Accusize provides various ER CNC Tool Holders for CNC machines with spindles, including CAT40, CAT50, ISO40, BT40, etc.