Internal Expansion Lock D30-D32 127x127x73mm, with Bottom Zero Point Bolt

Precision Internal Expansion Lock D30-D32 designed for CNC workholding, 5-axis machining, EDM workholding, and repeatable fixture setups. Built from chrome steel with 44–52 HRC hardness, this holder provides ±0.01mm repeatability and an internal expansion range of Ø30–32mm, with custom sizing available on request. Its 127x127x73mm body and bottom zero point bolt interface support accurate positioning, stable internal clamping, and efficient fixture changeover.

SKU: RHS-ZP960016

Description

This 127x127x73mm Internal Expansion Lock D30-D32 is designed for precision CNC workholding applications where parts need to be held securely from an internal bore. The internal expansion design clamps the workpiece from the inside, helping keep the outside surfaces open for 5-axis machining, multi-sided machining, EDM workholding, and inspection applications.

Made from chrome steel, the holder provides rigidity, wear resistance, and stable performance during repeated production use. The Ø30–32mm expansion range is suitable for bore-clamping applications, with custom sizing available based on specific workpiece requirements. With ±0.01mm repeatability and a bottom zero point bolt interface, this internal expansion lock supports accurate fixture positioning, faster setup changes, and dependable workholding stability in precision machining environments.

SpecificationValue
Size127x127x73mm
MaterialChrome Steel
Product TypeInternal Expansion Lock D30-D32
Mounting InterfaceBottom Zero Point Bolt
Hardness44–52 HRC
Expansion RangeØ30–32mm
CustomizationExpansion size can be customized as required
Repeatability±0.01mm
Net Weight3.85kg
Overall Length127mm
Overall Width127mm
Overall Height73mm
Base Height Reference20mm
Round Body Diameter ReferenceØ95mm
Expansion Post Diameter ReferenceØ29.4mm
Expansion Post Height Reference25mm
Body Height Reference53mm
Mounting TypeZero Point Bolt Mounting from Bottom

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Additional information

Weight3.85 kg
Dimensions12.7 × 12.7 × 7.3 cm
Material for Vises

Stainless Steel

Compatibility for vises

Zero-Point Bolts

Zero-Point Adaptable

96mm

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Internal Expansion Lock D30-D32 127x127x73mm, with Bottom Zero Point Bolt

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