SHARK TOOLS ST40ER25275B ER25 CAT 40, 2.75" Projection Collet Chuck Holder

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Item #
  • Brand: SHARK TOOLS
  • Model #: ST40ER25275B
  • Collet Series: ER
  • Collet Type: ER25
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MSRP: CA$202.50 /each
Product Specifications
More Information
Model # ST40ER25275B
Collet Type ER25
Type ER Collet Chuck
Collet Series ER
Taper CAT 40
Projection 2.75"
Through Coolant Yes
Collet Range 0.04" - 0.630"
Clamping Nut Diameter ER25
Collet Size ER25
Drawbar Thread 5/8"-11
Gage Length 2.75"
Maximum Socket Depth 1.61"
Nut Round
Nut Diameter 1.65"
Prop. 65 Yes
Size ER-25
Stop Nut Thread Size 11/16"-16
Weight 2.46 lbs.
Country of Origin IMPORT

Prop 65 Warning

Many metalworking products do contain metals that are included in the latest Prop 65 warning. Exposure to the elements can be harmful. May cause cancer and reproductive harm.

The Premium ER Collet Chucks by Shark Tools to Elevate Precision and Performance. Shark Tools brings you premium-quality ER collet chucks with unique features. The ER chucks are balanced to G6.3 at a speed rate of 15,000 RPM. The chucks thus save maximum spindle bearing life. Also, the provision of AD coolant through the spindle elevates performance. You can employ these collet chucks to hold cylindrical tool shanks of end mills, drills, taps, reamers, etc. The premium ER collet chucks from Shark Tools are available in hex and round nut types, and the chucks come in varying sizes, such as ER16, ER20, ER25, ER32, and ER40. The models come with different projections of 2.75, 3, and 4 inches. They offer collet ranges as 0.02 to 0.406 inches, 0.04 to 0.512 inches, 0.04 to 0.630 inches, 0.04 to 0.810 inches, and 0.12 to 1.000 inches. All these models are heat-treated to a hardness of 56 to 60 HRC. Moreover, each of these ER collet chucks includes a stop screw. These ER collet chucks from Shark Tools can efficiently exert a strong clamping force on the parts on which they are used, thus contributing more productivity to your various machining applications. For the chucks, the taper shank is ground to an accuracy of AT3 or better, and the taper-to-taper runout is <0.0004 inches. The CAT 40 Drawbar threads are of size 5/8"-11. Furthermore, Shank Tools have taken special care in manufacturing the taper to comply with the specifications mentioned by ANSI B5.50 / ISO 7388.You can rely on these heavy-duty machine tool accessories offered by Shark Tools as they ensure maximum accuracy and enhance productivity.
Balanced to G6.3 at 15,000 RPM to save spindle bearing life


  • Taper-to-taper runout <0.0004".
  • AD coolant thru the spindle.
  • Hardened to 56-60 HRC.
  • Taper shank ground to AT3 accuracy (or better).
  • Taper manufactured in accordance with ANSI B5.50 / ISO 7388 specifications.
  • CAT 40 Draw bar threads: 5/8"-11


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