How do I choose the correct size clamp bracket for my spindle?

You must measure the exact outer diameter (OD) of your spindle motor housing using a vernier caliper. For example, a standard 2.2kW water-cooled spindle typically features an 80mm OD, which requires an 80mm inner diameter bracket. Do not rely on power wattage alone, as case sizes vary between air-cooled and water-cooled variants.

Why is cast aluminum preferred for spindle brackets over steel placeholders?

Cast aluminum offers a superb strength-to-weight ratio which reduces the total hanging load on your Z-axis motor. Furthermore, aluminum has inherent structural dampening characteristics that help absorb high-frequency harmonics and vibrations produced by 24,000 RPM spindles, protecting your machine's linear bearings.

Can I over-tighten the three clamping screws on the split jaw?

We recommend tightening the socket head screws uniformly in an alternating pattern until the spindle is locked securely against rotation. Over-tightening can strip the internal aluminum threads of the block or slightly compress thin-walled spindle casings, which can bind the internal cooling jackets or bearings.

Spindle Accessories✓ In Stock & Ready to Ship

CNC Spindle Mounting Clamp Bracket

SKU / Model: TQ-CNC-SCB-SERIES

Power RatingIndustrial Grade

Max SpeedUp to 60,000 RPM

Cooling MethodStandard Cooled

Interface / SpecP4 Precision Grade

CNC Spindle Mounting Clamp Bracket is a critical engineering component designed to stabilize high-speed spindle motors on your machine’s Z-axis gantry. Manufactured from premium-grade cast aluminum, this bracket undergoes surface sandblasting and precision internal boring to ensure flawless surface conformity and roundness accuracy. A loose or poorly fitting bracket introduces micro-vibrations that degrade cutting surface finish quality and cause premature failure of expensive spindle ceramic bearings.

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