Do Vitrified Bond Diamond Grinding Wheels Crack During Storage?

Vitrified bond diamond grinding wheels are widely used in precision machining due to their high rigidity, wear resistance, and thermal stability. However, many users encounter a common issue: cracks appearing after long-term storage.

So, do vitrified diamond grinding wheels crack over time? The answer is yes — if stored improperly.

This guide explains the causes of cracking and provides practical storage solutions to ensure safety and extend service life.

Why Do Vitrified Diamond Grinding Wheels Crack?

Although vitrified bond wheels are more stable than resin or rubber bond wheels, their brittle ceramic structure makes them sensitive to environmental and mechanical factors.

1. Humidity and Freezing Conditions

• Moist environments weaken the bond structure
• Freezing temperatures create internal stress
• Direct contact with concrete floors accelerates moisture absorption

Result: Reduced strength and risk of cracking

2. Mechanical Impact and Vibration

• Dropping, bumping, or rolling during handling
• Continuous vibration during storage

Result: Microcracks or sudden breakage

3. Long-Term Storage (Aging)

• Bond structure degrades over time
• Internal stress accumulates

Result: Increased cracking risk and reduced performance

4. Improper Stacking

• Excessive stacking height
• Uneven pressure distribution
• Thin wheels under heavy load

Result: Deformation and structural damage

5. Low Temperature

• Storage below 5°C (41°F)
• Thermal contraction stress

Result: Increased brittleness

How to Prevent Cracks in Grinding Wheels

1. Control the Environment

• Store in a dry, ventilated area
• Keep temperature above 5°C (41°F)
• Avoid humidity and freezing

2. Proper Storage Methods

Large or thick wheels:

• Store vertically or slightly inclined

Thin or small wheels:

• Stack horizontally
• Maximum height: 500–600 mm
• Use flat steel plates to distribute pressure

Cup or bowl wheels:

• Stack base-down individually

3. Careful Handling

• Avoid dropping or rolling
• Prevent vibration during transport
• Use proper handling tools

Inspection Before Use

For grinding wheels stored for a long time, inspection is critical.

• Perform a ring test using a wooden hammer
• Clear sound: good condition
• Dull sound: possible cracks

Warning: Never use a cracked grinding wheel.

Warehouse Management Tip

Apply the FIFO (First-In, First-Out) principle:

• Use older inventory first
• Avoid long-term storage
• Reduce aging risks

Conclusion

Vitrified bond diamond grinding wheels can develop cracks during storage, but this is largely preventable.

By controlling storage conditions, avoiding mechanical damage, and using proper stacking methods, you can:

• Extend service life
• Maintain grinding performance
• Ensure operational safety

Proper storage is not optional — it is essential for maximizing grinding wheel performance.