BIG KAISER Launches World’s Smallest Hydraulic Chuck for HSK-E25 Machine Spindles

HSK Form E Hydraulic Chuck Super Slim

Hoffman Estates, IL – BIG KAISER announces the introduction of the world’s smallest hydraulic chuck for HSK-E25 machine spindles, thus completing its extensive range of BIG KAISER Super Slim Hydraulic Chucks.

The Super Slim type of Hydraulic Chucks (HDC) are the perfect tool holders for precision finishing processes in confined areas with drills, reamers, ball mills, end mills, diamond reamers and grinding tools. Cutting tools with shank diameters of 3 or 4mm can be clamped directly and are ideally suited for high speed micro machining applications in the automotive, aerospace, medical, die and electronics industries.

BIG KAISER designed the Super Slim HDC to require only a single wrench for clamping and unclamping, a much easier and safer solution compared to heat shrink tool holders. These chucks can clamp ultra small endmills and drills directly, without needing a reduction sleeve. The external body diameter of the chuck nose is a mere 0.551" (14mm), and a gauge length of 1.575” (40 mm) making it compact and precise.  Each tool is precision balanced for speeds up to 60,000rpm and runout accuracy of less than 3 microns (.00012”) at 5xd.

“Our HSK-E25 tool holder lineup now includes BIG KAISER’s high precision, low runout, hydraulic chucks,” says Jack Burley, VP of sales and engineering at BIG KAISER. “These ultra-precise hydraulic chucks, with their extremely slim design, are perfectly suited for high-precision finish milling work on ultra-high speed spindles on machines with small work envelopes.”

The Super Slim HDCs for HSK-E25 machine spindles are available from stock; they are also available for the HSK-E 32 and HSK-E 40 spindle types.

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, Hoffman Estates, IL at 224-770-2999, e-mail or visit

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