What are 3M Radial Discs?
3M Radial Discs are an excellent tool for jewellery polishing with many benefits and applications.
- * No need for messy polishing compound.
- * Colour coded grades are easy to use.
- * Brilliant for polishing detail such as filagree.
- * Get right down into surface textures, etchings, soldered on additions etc.
- * Very fine grades can be used next to hard stones (light green 1 micron).
- * Ideal for repair work, for touching up small areas and delicate objects.
We manufacture and supply a range of radial discs.
3M Radial discs in 19mm and 25mm diameters. 19mm is best for jewellery scale work, finer grits are available in this size. The legs are also finer and more flexible. Sold individually you will need at least 3 discs.
Screw top mandrels are reusable, however it's advisable to have one per grade of radial disc.
Available in 2.35mm and 3mm spindle sizes, normally jewellers will use the 2.35mm option.
How do I use 3M Radial Wheels?
- The screw top mandrel unscrews, usually by hand though you can use a small screwdriver
2. Take three of the same grade and size radial discs with all the legs facing the same direction and thread onto the threaded part of the mandrel.
*Always use fresh new wheels, it doesn't work mixing old or new.
3. The most important thing is to check all the legs face the right way otherwise they will all fling off when you start polishing.
*Use this image as reference, the legs need to face anticlockwise when you look down on them mounted on the thread.
4. Now put the mandrel back together and ensure it is tightly screwed back together. Remember it will be spun so needs to be tight but not so tight you can't undo it and add new discs.
Choosing the Right Grades
There are slightly different grits available in each of the two sizes, generally the 19mm range is finer and better suited to jewellery work.
It isn't essential to use every grade, you can cut out steps too. A perfectly working selection for example could be 80g (yellow), 400g (blue), 6 micron (peach), 1 micron (light green) in that order.
Are There Bigger Wheels for Bench Polishers?
Well the short answer is yes!!
For small bench polishers particularly like the Foredom bench lathe we do 50mm and 75mm diameters with a reusable plastic taper centre.
The black screw centre has a taper centre for winding onto a taper pigtail.
Simply unscrew and mount the discs onto the threaded part. It is important that all discs have their legs facing the same direction.
You will need a minimum of 4 discs to be effective and they should all be the same grade (all new/same age).
It is important to have the legs facing the right direction.
Screw the other half of the centre until it is tight and traps the discs.
This wheel is then wound onto the taper pigtail of the polisher. If you look down the centre you will see that the hole tapers, widest end goes on first.