Baby Chuck 25N delivers 0.003 mm runout precision.

Press Release Summary:

Used for cutting tools with diameter up to ø25.4 mm, Baby Chuck 25N design is available in six collet series sizes. Featuring clamping range of ø.610 in. - 1.000 in., unit is designed in BIG-PLUS® (SK/BT), HSK and BIG Capto models. Chuck’s thrust ball bearings eliminate distortion of collet during tightening. Delivering 1 micron runout accuracy at collet nose, product is suitable for high speed cutting.

Original Press Release:

BIG KAISER Introduces Mega New Baby Chuck 25N

BIG KAISER’s Mega New Baby Chuck is now available up to ø1" clamping for drills, reamers and finishing end mills with .00004" runout accuracy. The Mega New Baby Chuck is the industry’s highest precision and multi-purpose collet chuck system. It is designed for high-speed cutting and guarantees a 1 micron runout at the collet nose.

The Mega New Baby is perfect for cutting tools with a diameter up to ø25.4 mm and its high-speed design is offered in six different collet series sizes. These precise and versatile collet chucks are well accepted and recognized for their accuracy in high-speed applications.

Ideal length and diameter of the holder is the key to precision machining. If selection is limited, an increased tool extension reduces performance. BIG KAISER has 353 different versions available as standard, making it easier to select the perfect one.

Mega New Baby Chuck 25N has a clamping range of ø.610"-1.000". The thrust ball bearings eliminate distortion of the collet during tightening and the patented design prevents the ball bearings from moving at high speed.

Additional features include:

  • Available in BIG-PLUS® (SK/BT), HSK and BIG Capto
  • Two-way coolant supply: Through tools or jet if tools don’t have any holes
  • High runout precision of 0.003mm at 4xD
  • Every chuck is 100% inspected twice

The collet is inspected twice to guarantee accuracy. The material, production, heat treatment and every other part is selected for precision. BIG KAISER’s Mega New Baby Chuck 25N is ready to take on any challenge in shop floors.

BIG KAISER is a worldwide leader in high-precision tooling systems and solutions for the metalcutting industry that guarantees extreme accuracy and repeatability. Our products are of the utmost quality - manufactured with materials and craftsmanship that enable superior performance. As a member of the BIG DAISHOWA Group (Osaka, Japan), BIG KAISER has grown into a well-recognized global tooling provider, with manufacturing facilities in North America, Europe and Asia.

For more information, contact BIG KAISER, , e-mail or visit


Dana Super

BIG KAISER Precision Tooling Inc.

2600 Huntington Blvd

Hoffman Estates, IL 60192

Phone: 224-770-2999

Fax: 224-770-2997

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