Practical guides for South African workshops
Choose the Right Disc for Every Job
Compare materials, dimensions and specifications to find discs suited to your tool, workpiece and automotive or workshop task.
Match the Material
See how abrasives and blade construction influence cutting speed, finish and service life.
Check the Fit
Understand diameter, bore, thickness and speed ratings before selecting a disc.
Find Guidance by Topic
Disc Materials
Sizes & Fitment
Specifications & Ratings
Tool & Automotive Uses
How Disc Materials Perform
Aluminium Oxide Abrasives
A versatile choice for steel grinding and cutting; select the right grade and disc type for the finish and lifespan your task demands.
Zirconia Alumina Abrasives
Tough grains renew their cutting edges under pressure, making them well suited to demanding metal removal and frequent use.
Ceramic Grain Abrasives
Fast-cutting grains resist wear during heavy grinding, helping maintain performance on hard metals when used with suitable equipment.
Diamond Cutting Discs
Durable diamond edges cut hard, non-ferrous materials such as concrete and tile; check the blade design before use on a specific surface.
Cutting vs Grinding Discs
Thin Cutting Disc
Typical size: 115 × 1–1.6 mm
Use: straight cuts in suitable metal
Benefit: narrow kerf and less material loss
Trade-off: not designed for side grinding
Check: abrasive type matches the metal
Grinding Disc
Typical size: 115 × 6 mm
Use: weld removal and edge shaping
Benefit: thicker disc tolerates rated side loads
Trade-off: wider contact area removes more material
Check: bond and abrasive suit the job
Three checks before fitting
How to Match a Disc to the Job
1
Identify the Material and Task
Note whether you’re cutting or grinding, then check the workpiece material. Choose a disc labelled for that material and operation.
2
Match the Grinder
Confirm the disc’s diameter and bore fit the grinder, and its marked maximum RPM is at least the grinder’s no-load RPM.
3
Review the Working Conditions
Check the guard, mounting hardware and disc condition. Secure the workpiece and use the protective equipment required for the task.
Disc Checks Before You Start
Confirm the outer diameter fits the grinder
Match the bore to the spindle or approved flange
Check the disc thickness suits the task
Compare the disc’s maximum RPM with the grinder’s no-load RPM
Verify the disc is rated for cutting or grinding as intended
Read the material designation on the label
Confirm the abrasive type suits the workpiece
Check the disc’s marked standard and safety symbols
Look for a legible manufacturer and batch marking
Check any marked expiry date for bonded abrasive discs
Inspect for chips, cracks or warping
Confirm the guard suits the disc and operation
Check the flanges are clean and correctly fitted
Make sure the disc seats without forcing the bore
Keep the side handle fitted where required
Secure the workpiece before starting
Wear suitable eye, face, hearing and respiratory protection
Run a newly fitted disc clear of the workpiece to check for vibration
Frequently Asked Questions About Discs
Which disc material should I choose for cutting metal?
Match the abrasive to the metal and task. Aluminium oxide is commonly used for general steel, while discs labelled for stainless steel help reduce contamination. Check the disc’s stated application before use.
How do I check whether a disc fits my tool?
Compare the disc diameter, bore or mounting type, thickness and maximum RPM with your tool’s specifications. Never fit a disc rated below the tool’s operating speed or modify it to make it fit.
When should I use a cutting disc instead of a grinding disc?
Use a cutting disc for straight cuts and a grinding disc for material removal or edge shaping. Do not grind with the side of a cutting disc unless its manufacturer explicitly permits it.
What should I consider when choosing automotive brake discs?
Check vehicle compatibility, disc diameter, thickness, bolt pattern and any manufacturer specifications. Replace discs that are below the stated minimum thickness, and have fitment assessed by a qualified technician.
How should I store and inspect abrasive discs in South Africa?
Store discs flat in a dry area, away from moisture, impact and extreme heat. Before each use, check the expiry date where applicable and inspect for cracks, chips or warping; discard damaged discs.
Put Your Disc Knowledge to Work
Explore disc listings and compare materials, dimensions and intended uses to narrow down suitable options for your tools, workshop jobs or automotive requirements.