Precision Polishing Spindle for Hard Drive Platter Polishing

Product Specifications

Technical details and manufacturing context for Precision Polishing Spindle

Definition

The Precision Polishing Spindle is a component used in automated hard drive platter polishing machines. It provides the rotational motion and positioning required to hold and orient platters during the polishing process. The spindle is designed to maintain exact rotational speeds, minimal runout, and stable positioning throughout the polishing cycle, which is critical for achieving uniform material removal and consistent surface finish. It is typically integrated into a polishing machine where it works with polishing tools to remove material from the platter surface. The spindle holds the platter securely using vacuum or mechanical clamping systems, ensuring that the platter remains stable under the forces exerted during polishing. Precision bearings and motor systems are used to maintain rotational accuracy. The spindle is constructed from high-grade steel, ceramic bearings, and an aluminum alloy housing, offering a balance of strength, low friction, and lightweight design. Key parameters include spindle speed (1000–10000 rpm), runout (≤0.002 mm TIR per ISO 230-1), axial stiffness (≥200 N/µm), radial stiffness (≥150 N/µm), motor power (0.5–2.2 kW), voltage (220–380 V AC per IEC 60038), frequency (50–60 Hz per IEC 60038), operating temperature (5–40 °C), relative humidity (30–80% non-condensing), ingress protection (IP54–IP65 per IEC 60529), bearing type (angular contact ball bearings per DIN 628), and weight (50–150 kg). These values are reference ranges and must be verified for the specific model and application. The spindle is intended for use in industrial environments and should be selected based on the requirements of the polishing process. It is important to confirm model-specific specifications and compliance with relevant standards with the legal manufacturer or supplier before procurement.

Working Principle

The spindle rotates at precisely controlled speeds while maintaining minimal axial and radial runout. It holds the hard drive platter securely using vacuum or mechanical clamping systems, allowing polishing tools to uniformly remove material from the platter surface. Precision bearings and motor systems maintain consistent rotational accuracy throughout operation.

Common Materials

High-grade steel, Ceramic bearings, Aluminum alloy housing

Technical Parameters

Parameter	Typical range	Notes & selection driver
Spindle Speed	1000–10000 rpm	Higher speed improves polishing rate but may cause vibration.
Runout (TIR)	≤0.002 mm	Critical for uniform polishing; lower is better.ISO 230-1
Axial Stiffness	≥200 N/µm	Ensures stable platter positioning under load.
Radial Stiffness	≥150 N/µm	Resists lateral forces during polishing.
Motor Power	0.5–2.2 kW	Sufficient to maintain speed under load.
Voltage	220–380 V AC	Three-phase for industrial use.IEC 60038
Frequency	50–60 Hz	Compatible with global power grids.IEC 60038
Operating Temperature	5–40 °C	Outside range may affect bearing lubrication.
Relative Humidity	30–80 %	Non-condensing; high humidity may cause corrosion.
Ingress Protection	IP54–IP65	Protects against dust and water splashes.IEC 60529
Bearing Type	Angular contact ball bearings	High precision and rigidity.DIN 628
Spindle Weight	50–150 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 Motor
Provides rotational power and speed control

Material: Copper windings, steel housing
Precision Bearings Part
Minimize friction and maintain rotational accuracy

Material: Ceramic or high-grade steel
Clamping Mechanism
Secures hard drive platter during polishing

Material: Stainless steel
Cooling System
Maintains optimal operating temperature

Material: Aluminum housing, copper tubing
Vacuum Clamping Optional
Holds the platter by suction instead of mechanical jaws, on vacuum-chuck versions.

Manufacturers of Precision Polishing Spindle

Manufacturer profiles associated with Precision Polishing Spindle.

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Frequently Asked Questions

What is the primary function of the Precision Polishing Spindle?

The spindle holds and positions hard drive platters during polishing, providing precise rotational motion and stability to ensure uniform material removal and surface finish.

What are the key performance parameters to consider?

Key parameters include spindle speed (1000–10000 rpm), runout (≤0.002 mm TIR), axial and radial stiffness (≥200 and ≥150 N/µm), motor power (0.5–2.2 kW), and operating temperature (5–40 °C). These are reference ranges and must be verified for the specific model.

What standards are referenced for this spindle?

The spindle references ISO 230-1 for runout, IEC 60038 for voltage and frequency, IEC 60529 for ingress protection, and DIN 628 for bearing type. These standards serve as verification references, not proof of certification.

How should I verify the spindle's suitability for my application?

You should consult the legal manufacturer or supplier to confirm model-specific values, such as exact speed range, stiffness, and environmental limits, and ensure they meet your polishing process requirements.

Data Basis

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

Preliminary Technical Classification

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pressure:	Max 0.5 bar (7.25 psi) axial load on spindle nose
other spec:	Flow Rate: 2-10 L/min (coolant), Slurry Concentration: ≤15% abrasive by weight, Max RPM: 10,000, Runout: ≤1 μm TIR
temperature:	+5°C to +40°C

Precision Polishing Spindle

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards