Precision Spindle for Polishing Applications | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Precision Spindle

Definition

The Precision Spindle is a critical component within the Polishing Spindle Assembly, serving as the central rotating element that holds and drives polishing tools or workpieces. It provides the precise rotational motion required for surface finishing operations, ensuring minimal runout and vibration for high-quality polishing results. Constructed from high-grade alloy steel and equipped with ceramic bearings, the spindle is engineered for durability and precision. Its diameter ranges from 80 to 120 mm, and its length from 300 to 600 mm, allowing compatibility with various tooling and mounting configurations. The spindle supports maximum speeds between 10,000 and 30,000 rpm, with radial and axial runout limited to 0.002–0.005 mm and 0.003–0.008 mm respectively, per ISO 1101. Bearings are precision class P4 per ISO 492, and lubrication is oil-air to minimize heat generation. Water cooling maintains thermal stability during operation. Motor power ranges from 5.5 to 15 kW, operating on a 380 V, 50 Hz three-phase supply per IEC 60038. The maximum operating temperature is 60°C, and the IP rating is IP54 per IEC 60529, protecting against dust and water splashes. The spindle weighs between 50 and 120 kg, affecting machine dynamics and installation. These specifications are directory reference ranges; actual values must be confirmed with the legal manufacturer or supplier for specific models and applications. The spindle's design ensures accurate positioning and smooth rotation, critical for achieving consistent surface finishes in polishing operations.

Working Principle

The spindle rotates around its central axis, driven by a motor through a coupling or direct drive system. Precision bearings support the shaft to minimize radial and axial play, while the spindle's balanced design reduces vibration during high-speed operation. It transmits torque to polishing tools while maintaining accurate rotational positioning. The oil-air lubrication system ensures low heat generation, and water cooling maintains thermal stability, allowing sustained high-speed operation. The spindle's runout specifications are critical for polishing accuracy, as any deviation can affect surface finish and tool life.

Common Materials

High-grade alloy steel, Ceramic bearings

Technical Parameters

Parameter	Typical range	Notes & selection driver
Spindle Diameter	80–120 mm	Determines compatibility with tooling and bearings.
Spindle Length	300–600 mm	Affects reach and mounting options.
Max Speed	10000–30000 rpm	Higher speeds require better balancing and lubrication.
Radial Runout	0.002–0.005 mm	Critical for polishing accuracy.ISO 1101
Axial Runout	0.003–0.008 mm	Affects surface finish and tool life.ISO 1101
Bearing Type	P4	Precision class for high-speed operation.ISO 492
Lubrication	Oil-air	Oil-air lubrication ensures low heat generation.
Cooling Method	Water	Water cooling maintains thermal stability.
Motor Power	5.5–15 kW	Power determines cutting capability.
Voltage	380 V	Standard three-phase industrial supply.IEC 60038
Frequency	50 Hz	Standard mains frequency.IEC 60038
Max Operating Temperature	60 °C	Exceeding may damage bearings and seals.
IP Rating	IP54	Protects against dust and water splashes.IEC 60529
Weight	50–120 kg	Affects machine dynamics and installation.

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

Components / BOM

Spindle Shaft Part
Main rotating element that transmits torque and supports polishing tools

Material: High-grade alloy steel
Precision Bearings
Support the shaft with minimal friction and maintain rotational accuracy

Material: Ceramic or high-grade steel
Tool Mounting Interface Part
Secures polishing tools or workpieces to the spindle

Material: Hardened steel
Oil-Air Lubrication System
Keeps the bearings lubricated with minimal heat input, which is what allows sustained high speed.
Water Cooling
Holds the spindle thermally stable so runout stays within spec during long runs.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Polishing Spindle Assembly

View system integration details

Manufacturers of Precision Spindle

Manufacturer profiles associated with Precision Spindle.

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Frequently Asked Questions

What materials are used in the Precision Spindle?

The spindle is made of high-grade alloy steel and uses ceramic bearings, as listed in the directory. These materials are chosen for durability and precision, but specific grades should be confirmed with the manufacturer.

What is the maximum operating temperature?

The maximum operating temperature is 60°C. Exceeding this may damage bearings and seals, so it is important to ensure proper cooling and lubrication during operation.

What is the IP rating of the spindle?

The IP rating is IP54 per IEC 60529, which protects against dust and water splashes. This is suitable for typical industrial polishing environments, but additional protection may be needed for harsher conditions.

How does the spindle achieve high precision?

Precision is achieved through the use of P4 class bearings, minimal runout (radial 0.002-0.005 mm, axial 0.003-0.008 mm per ISO 1101), and a balanced design that reduces vibration. Oil-air lubrication and water cooling also contribute to stable operation.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Max 5 bar
flow rate:	Up to 20 L/min
temperature:	10°C to 80°C
slurry concentration:	Max 30% solids by weight

Precision Spindle

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