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Over 70 years of history have given us not only the expertise required to design better products, but also the vision to be the first in line when it comes to new technologies and solutions. Whatever your workholding needs, read through to find what you're looking for.


Inch serration or metric serration


Tongue and groove

High precision power chucks

  • Ø 220 - 320 mm
  • Large through hole
  • 3 jaws
  • proofline chucks = fully sealed-low maintenance


  • Same through hole as the standard (non sealed) open center chucks type BH
  • Perfect connection to the cylinders type VNK having the same through hole
  • Body designed for high rigidity for reduced distortion during clamping and rotation
  • No centrifugal force compensation, but allowing high speed thanks to the light master jaws


  • 3-jaw chuck
  • 1 set T-NUTS and bolts
  • 1 set soft top jaws
  • Mounting bolts

After the important success of the AP and NT chucks (sealed without through hole) in high production processes where the part could be clamped with the simple radial movement (no active pull down), the market requested a new line of chucks with similar features, but with open center. To fulfill these requirements, SMW‑AUTOBLOK designed and realized the new line of BP chucks. The BP chucks brings all the advantages of the sealed chucks in our “proofline” series also to the open center standard chucks, allowing also standard machines for general use to finally use a modern work-holding system. The BP chucks maintain the same basic features as all other “proofline” chucks: - Constant lubrication and protection from coolant, chips and swarf penetration - High productivity thanks to the reduced down-time for maintenance - Ecological thanks to the limited use of grease and the absence of grease contamination in the coolant - Long service life at high precision - Ideal for machining in harsh environment due to fluids, chips and swarf - Ideal for machining with high pressure coolant - Economical, thanks to the operating life 5-10 longer against a non-sealed chuck

All our sales people have engineering backgrounds as well as in-depth technical experience and knowledge thanks to our branches' technical offices. Our staff are spread throughout the world, able to offer the local knowledge and understanding that customers require and that helps us maintain our commitment to quality service always.