What makes an PIONEER Tool Holder great is the differences. Making a tool holder with 1/2 the guaranteed runout of the competition. Dynamically Balancing to a grade that exceeds most machine builders maximum RPM and requirements. Changing the look to match the quality of the tool while keeping the price point competitive and reasonable.

CAT40 BC Premium Performance Bearing-less Mill Chucks
• 0.0002” TIR Guaranteed @ 50mm (2”)
• Eliminating wear components & easy to clean
• Solid Shoulder Design prevents over tightening
• Smaller OD than Traditional Mill Chucks
• Sealed bore design for high pressure applications
• Over 400 ft/lbs of radial torque on 1.25” Carbide Shanks
• Unlike materials & mass dampen cutting harmonics
• Designed for Performance Milling with Neutral to 30° flute geometry, not designed for hi-helix applications
• Tapers are ground better than AT3 for optimal T.I.R.
• Balanced for use @ 20,000 RPM

Optional (Order Separately):
• Torque Wrench
• Nylon Screw Seal for short tool shanks
• DIN-B Flange Coolant
• Jet-Blast Coolant Ports (for Solid Tooling)
• Fine Trim Balance (Sample cutter required for balance compensation)
• For Non-Pull Out add –NP to the part number

A Bore	D	L1 Projection	L2 Tool Enters	Coolant Seal Depth (Min. Shank Length)	Grease & Torque
0.5000	1.38	2.56	2.36	1.38	100 ft/lbs

PIONEER

Quality Assurance

Quality is the cornerstone of our organization and it is the only way to retain customers. PIONEER stands behind every product we manufacture and sell. PIONEER warrantees against defective material and workmanship for one year from the shipping date.