Super Finish Stones For Bearing Industry

Advanced Surface Finishing Solutions by JAIN PRECISION TOOLS

Product Description

JAIN PRECISION TOOLS manufactures high-performance Super Finish Honing Stones specifically developed for precision finishing of bearing raceways, bearing rings, rollers, and critical rolling-contact surfaces. These stones are designed to remove grinding marks, reduce surface waviness, improve bearing geometry, and generate an optimized surface texture essential for modern high-speed and low-noise bearing applications.

Superfinishing is the final operation after grinding and honing, where only a few microns of material are removed to produce an ultra-fine surface finish and superior functional characteristics.

Super Finish Honing Stones operate under controlled pressure while oscillating against the rotating workpiece. The combination of rotational movement and reciprocating stone motion creates a fine cross-hatch pattern that removes surface peaks without affecting dimensional accuracy.

The process:

• Removes grinding burns and damaged surface layers.
• Eliminates micro-peaks and waviness.
• Produces a plateau surface structure.
• Improves lubricant retention characteristics.
• Enhances rolling contact fatigue life.

Abrasive Types

Aluminum Oxide (WA)

• For hardened bearing steels.
• Excellent finishing performance.
• Economical solution for standard applications.

Silicon Carbide (GC)

• Suitable for cast iron and non-ferrous materials.
• Fast cutting characteristics.

CBN (Cubic Boron Nitride)

• Ideal for hardened bearing steel (58–65 HRC).
• Long tool life.
• High productivity.
• Superior consistency.

Diamond

• Used for ceramics, tungsten carbide, and special bearing materials.
• Ultra-fine finishing applications.

• Resin Bond
• Vitrified Bond
• Elastic Bond
• Hybrid Bond

Selection depends on:

• Material hardness
• Surface finish requirement
• Stock removal
• Machine parameters

Typical values:

• Ra : 0.005 µm – 0.10 µm
• Rz : 0.05 µm – 1.0 µm
• Waviness Reduction : Up to 90%
• Roundness Improvement : Significant
• Bearing Contact Area : Increased

Bearing Inner Rings

Super finishing of:

• Raceway tracks
• Bore surfaces
• Shoulder faces

Benefits:

• Reduced friction
• Improved running accuracy
• Extended service life

Bearing Outer Rings

Used for:

• Raceway finishing
• Noise reduction applications
• Precision bearing manufacturing

Benefits:

• Better load distribution
• Improved lubrication film formation

Cylindrical Rollers

Applications:

• Roller surface finishing
• Roller profile correction
• Surface texture optimization

Benefits:

• Lower rolling resistance
• Improved fatigue strength

Taper Rollers

Used for:

• Precision roller finishing
• Surface defect removal
• High-speed bearing applications

Needle Rollers

Provides:

• Uniform surface finish
• Enhanced wear resistance
• Improved dimensional consistency

Spherical Rollers

Applications:

• Wind turbine bearings
• Heavy-duty industrial bearings
• Mining equipment bearings

• Deep Groove Ball Bearings
• Angular Contact Bearings
• Taper Roller Bearings
• Cylindrical Roller Bearings
• Needle Roller Bearings
• Spherical Roller Bearings
• Thrust Bearings
• Automotive Wheel Bearings
• Railway Bearings
• Aerospace Bearings
• Precision Spindle Bearings

JAIN PRECISION TOOLS Super Finish Honing Stones are suitable for:

Supfina Machines

• Supfina Race Series
• Supfina Cenflex
• Supfina Nano Series

Nagel Machines

• Nagel Superfinishing Systems
• Nagel Bearing Raceway Finishers

• Thielenhaus Machines
• Microfinish Series
• Centreless Superfinishing Machines
• Stahli Machines
• Peter Wolters Machines
• Bryant Bearing Finishing Machines
• CNC Superfinishing Machines
• Special Purpose Bearing Raceway Machines
• Centerless Roller Superfinishing Machines
• Double Disc Finishing Systems

Custom stone dimensions available for all machine makes.

Bearing Steels

• SAE 52100
• 100Cr6
• EN31
• SUJ2

Hardened Materials

• 58–65 HRC Bearing Steel
• Tool Steel
• Alloy Steel

Advanced Materials

• Silicon Nitride Ceramic Bearings
• Tungsten Carbide Components
• Hybrid Bearing Materials

Reduced Friction

The plateau finish minimizes metal-to-metal contact and reduces operating temperature.

Lower Noise Levels

Critical for:

• Electric vehicle bearings
• High-speed spindle bearings
• Precision machine tool bearings

Improved Lubrication

Micro-texture retains lubricant film and prevents premature wear.

Enhanced Fatigue Life

Reduction of surface stress concentrations improves rolling contact fatigue resistance.

Better Load Carrying Capacity

Improved raceway quality increases bearing performance under dynamic loads.

Extended Bearing Life

Typical life improvements of 20–50% depending on operating conditions.

Each stone is manufactured and tested for:

• Hardness consistency
• Density control
• Abrasive grain distribution
• Bond strength
• Dimensional accuracy
• Cutting performance
• Wear characteristics

• Specialized solutions for bearing manufacturers.
• Custom-designed superfinishing stones.
• Expertise in bearing raceway applications.
• Consistent quality and repeatability.
• Technical support for process optimization.
• Solutions for conventional and CNC superfinishing systems.

• Bearing Manufacturing
• Automotive Components
• Electric Vehicle Bearings
• Railway Bearings
• Aerospace Bearings
• Wind Energy Bearings
• Industrial Equipment Bearings
• Precision Engineering

Tagline

JAIN PRECISION TOOLS – Precision Superfinishing Solutions for High-Performance Bearings.

Typical Operating Parameters

• SKF
• Schaeffler
• NSK
• NTN
• Timken
• JTEKT

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