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.

MC Mill Chuck - Best in Class
• 0.0002” TIR Guaranteed @ 4D or up to 100mm
• 5X the driving torque than ER on nominal sizes, over 600 ft/lbs of radial torque on 1.25” Carbide shanks
• 20% Higher grip force than competitive models
• Unlike materials & bearings & mass dampen cutting harmonics
• Designed for Performance Milling with Neutral flute geometry, not designed for hi-helix applications
• Reducing sleeves down to 1/8”
  Note: Using reducing sleeves also reduces holding power by 6X

  Features
  MC Milling Chucks	MC Milling Chuck Collets
  5 µm - 0.0002” Runout @ 4” x Cutter Shank Dia. Designed for Tool Shanks w/ ISO h6 Class Tolerance Balanced @ 15,000 RPM Tapers are ground better than AT3 for optimal T.I.R.	3µm - 0.0001” Runout Interchangeable with most competitive models Axial Preset model available MC Collets are Straight Sleeves that allow you to expand the capabilities of your Mill Chuck.

  

  A Bore	B Max. Tool Enters	D	L Projection	Preset Screw	Collet	Wrench
  1.250	3.23	2.76	4.13	ASC-16-40	MC125	65-70 HOOK

  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.