Click to enlarge
Previous product
ESC12
$6.00
Back to products Back to products
Next product
ESC18 $6.00

ESC14 | END MILL HOLDER - SET SCREW | END MILL HOLDERS

$6.00
Chicago, USA Stock -
Canada Stock -
Set Screw for 1/4" End Mill Holder
Specification
  • ProjectLength - 1/4"
  • Size - Inch
Description
Set Screw for 1/4" End Mill Holder

Accuracy

PAC Precision Tools' Set Screw End Mill Holders are designed to securely hold cutting tools with Weldon flats, preventing slippage or pull-out during heavy machining. These holders provide maximum rigidity and torque transmission for demanding CNC operations.

Features

  • Weldon flat set screw locking system
  • High rigidity for heavy-duty milling applications
  • Balanced for high-speed performance
  • AT3 Class taper accuracy
  • H5 bore tolerance
  • Hardness: HRC 56–58
  • Case depth: 0.8 mm ± 0.2 mm
  • Surface finish: Ra < 0.0005 mm
  • Engineered from premium case-hardened alloy steel


PAC Precision Tools, an distributor of End Mill Holders in the USA ensure secure clamping, high torque transfer, and consistent machining accuracy across multiple taper platforms.

Frequently Asked Questions

1. What is the use of a Set Screw in End Mill Holders? ▼
The Set Screw locks the cutting tool in place, ensuring it doesn’t slip during operation. It provides strong holding power, making it ideal for roughing or high-torque machining.
2. Are Set Screws included with the End Mill Holders? ▼
Yes, every PACTools End Mill Holder includes a high-quality Set Screw designed to perfectly match the holder and provide a reliable, secure fit.
3. How tight should I make the Set Screw? ▼
Tighten firmly using a torque wrench if possible. Over-tightening can cause tool shank damage, while under-tightening may lead to tool slippage or misalignment. For more guidance, you can contact us at +1 262-282-2456.
4. Can PACTools Set Screws be replaced? ▼
Yes, they can be easily replaced when worn or stripped. Using new, high-strength screws helps maintain consistent tool holding performance.
5. What materials are PACTools Set Screws made of? ▼
They are made from hardened alloy steel to resist wear and provide long-lasting durability, even under frequent tool changes.
6. What is an HSK Coolant Tube? ▼
An HSK Coolant Tube directs coolant through the holder directly to the cutting edge, keeping the tool cool and reducing chip buildup during machining.

Features

  • AT3 Class taper accuracy for precise spindle fit
  • H5 bore tolerance for optimum surface contact with the cutting tool
  • High-precision pilot bore for improved concentricity
  • Available tapers: BBT30, BBT40, BT30, BT40, BT50, HSK63A, HSK100A
  • Balanced to 25,000 RPM at G2.5
  • The flange coolant AD+B feature is standard in all CAT holders with inch sizes
  • All corrosion-proof holders have a special rust preventive coating
  • Hardness: HRC 56–58
  • Carbon depth: 0.8 mm ± 0.2 mm
  • Surface Roughness: Ra < 0.005 mm
  • Crafted from case-hardened alloy steel

Frequently Asked Questions

1. What is an End Mill Holder? ▼
An End Mill Holder is a tool for securely clamping a cutting tool, like an end mill, into a milling machine spindle to prevent it from rotating during use. These holders provide a more rigid and stable connection than a standard collet, especially for heavy-duty applications, by using a set screw to grip a flat, known as a Weldon shank, on the end mill’s body.
2. What are the benefits of using PACTools End Mill Holders? ▼
End Mill Holders provide excellent rigidity, reliable performance, and reduced tool slippage and vibrations. They are ideal for demanding machining operations where strength and stability are essential for maintaining precision, dimensional accuracy, and surface quality.
3. How is an End Mill Holder different from an ER Collet Holder? ▼
An end mill holder uses a set screw to push against the tool shank, which is less rigid and more prone to runout than an ER collet holder, making it suitable for less demanding applications. An ER collet holder uses a collet with a conical shape to grip the tool shank with high accuracy and a more rigid, vibration-damping grip, making it better for general-purpose and high-speed machining. End Mill Holders are better for high-torque applications, while ER Collet Holders are more versatile for lighter and varied tool sizes.
4. What sizes are available for End Mill Holders? ▼
PAC Precision Tools offers End Mill Holders in multiple taper configurations, such as CAT, BT, and HSK, to fit a wide range of CNC spindles. Each size ensures precision fit, excellent balance, and compatibility with standard tool shank diameters used in machining. And the available project length is from 1-3/4", 2", 2-3/8", 2-1/2", and more. For more info, please contact us.
5. Are End Mill Holders suitable for high-speed machining? ▼
Yes, PAC Precision Tools End Mill Holders can be suitable for high-speed machining, but it depends on the specific holder type and its quality. While traditional solid end mill holders are not recommended for high-speed machining operations due to their lack of balance, more advanced and precise holders like collet chucks, hydraulic holders(chucks), of those with high-speed tapers like HSK are well-suited for high-RPM operations
6. How should I maintain End Mill Holders? ▼
Clean the holders after every use, remove metal chips and coolant residue, and lightly oil the surface to prevent rust. Proper care maintains accuracy, improves performance, and extends the lifespan of both the holder and the spindle. For more guidance on maintenance, you can email us at sales@pactoolsusa.com.
7.Do End Mill Holders support coolant-through systems? ▼
Yes, selected models feature coolant-through capability that allows coolant to flow directly to the cutting area. This feature improves chip removal, tool life, and overall machining efficiency, especially during high-speed or deep-cutting operations
-->

Related Products

BT DUAL-CONTACT TAPER

BT DUAL-CONTACT TAPER

BT TAPER

BT TAPER

CAT DUAL-CONTACT TAPER

CAT DUAL-CONTACT TAPER

CAT TAPER

CAT TAPER

END MILL HOLDER - SET SCREW

END MILL HOLDER - SET SCREW

HSK TAPER

HSK TAPER