Body Block: Weight 0.8-3.5 kg, Taper Type HSK-A63, CAT40, BT30

Q: What is the primary function of a body block in tool holders?

The body block provides the structural connection between the machine spindle and cutting tool, ensuring precise alignment, torque transmission, and vibration control during machining operations.

Q: How do I select the right body block for my machining application?

Consider spindle interface type (HSK/CAT/BT), required RPM, tool clamping mechanism, material compatibility, and precision requirements. Match specifications to your machine tool's capabilities and cutting operations.

Component Specifications

Definition

The body block is the main structural component of a tool holder system, designed to securely interface between the machine tool spindle and the cutting tool. It provides precise alignment, torque transmission, and vibration damping during high-speed machining operations. Engineered with tight tolerances, it ensures tool stability and repeatability in metal cutting applications.

Working Principle

The body block operates by creating a rigid mechanical connection between the machine spindle and cutting tool through a tapered interface (typically HSK, CAT, or BT standards). It transmits rotational force from the spindle to the tool while maintaining concentricity and minimizing runout. Internal mechanisms (like collets or hydraulic systems) secure the tool, while external features align with the spindle's drive keys and retention system.

Materials

High-strength alloy steel (e.g., 4140, 4340) or tool steel, heat-treated to HRC 45-55 for durability and wear resistance. Some premium versions use carbide-reinforced composites or ceramic coatings for enhanced performance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Weight	0.8-3.5 kg
Taper Type	HSK-A63, CAT40, BT30
Maximum RPM	15000-40000
Runout Tolerance	<0.003 mm
Tool Clamping Force	15-30 kN
Coolant Through Capability	Yes/No

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 7388, DIN 69893, ANSI B5.50

Parent Products

This component is used in the following industrial products

Tool Holders

Mechanical fixtures that securely mount cutting tools onto a rotating cutting drum.

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Engineering Analysis

Risks & Mitigation

Tool slippage during high-torque operations
Thermal expansion affecting precision
Fatigue failure from cyclic loading
Contamination of taper interface

FMEA Triads

Trigger: Improper cleaning of taper interface
Failure: Reduced clamping force and tool slippage
Mitigation: Implement regular cleaning protocols and use protective caps

Trigger: Excessive spindle speed beyond rating
Failure: Catastrophic failure due to centrifugal forces
Mitigation: Adhere to manufacturer RPM limits and implement speed monitoring

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.001 mm for critical dimensions, <0.003 mm runout at tool tip

Test Method

Laser interferometry for runout measurement, torque testing for clamping force, dynamic balancing to ISO 1940 G2.5

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Body Block

Manufacturer profiles associated with Body Block.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of a body block in tool holders?