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517002M $89.00

517001M | BT TAPER | END MILL HOLDERS

$89.00
Chicago, USA Stock -
Canada Stock -
BT40-6MM-63L END MILL HOLDER
Specification
  • BoreSize - 6mm
  • ProjectLength - 63mm
  • Size - MM
  • Taper - BT40
Description
BT40-6MM-63L END MILL HOLDER

Accuracy

PAC Precision Tools BT Taper End Mill Holders feature a symmetrical flange design that enhances balance and stability at higher spindle speeds. Designed for precision CNC machining, these holders ensure secure clamping and consistent performance.

Features

  • Symmetrical BT taper for improved high-speed balance
  • Balanced to 25,000 RPM at G2.5
  • AT3 Class taper precision
  • Strong torque transmission capability
  • Set screw locking for anti-pull-out protection
  • H5 bore tolerance for superior grip
  • Case-hardened alloy steel (HRC 56–58)
  • Available in BT30, BT40, and BT50 tapers

BT Taper End Mill Holders supplier in the USA, suitable for high-speed milling and precision machining applications.

Frequently Asked Questions

1. What is a BT Taper End Mill Holder? ▼
A BT Taper End Mill Holder is made for CNC machines with BT spindles. Its symmetrical design ensures perfect balance, making it suitable for both high-speed and high-torque machining.
2. What are the benefits of using PACTools BT Taper holders? ▼
PACTools BT Taper holders provide excellent stability, precise tool clamping, and smooth rotation at high speeds. Their balanced flange design reduces vibration and improves machining accuracy.
3. What sizes are available of an End Mill Holder? ▼
PAC Precision Tools supplies BT30, BT40, and BT50 End Mill Holders, covering a wide range of CNC milling and drilling applications. Each size offers strong clamping and repeatable performance.
4. What’s the difference between BT and CAT tapers? ▼
BT holders have a symmetrical flange and metric threads, while CAT holders use an asymmetrical flange with inch threads. BT tapers are more common in Asian and European machines for high-speed cutting.
5. Can BT holders be used for coolant-through operations? ▼
Yes, many BT holders feature through-coolant designs that improve chip evacuation and keep tools cool during intensive machining operations.
6. How can I care for my BT Taper End Mill Holder? ▼
Clean after every use, inspect for wear, and lightly oil before storing. Keeping the taper surface clean ensures accurate and repeatable tool changes. For more care tips, contact us or email us.

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
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