G Sharp Precision Tool Sharpening System - Sharp Edge
Sharpening a chisel is easy with the Sharp Edge. After identifying the parts of the sharp edge tool, choose a flat and uncluttered surface in which to use the sharp edge and decide which way round to use it ( it can be used left or right- handed) The Sharp Edge can be fixed to the work station or a block of wood to be held in a vice or used unfixed and totally portable.
How to use the G Sharp
1. For sharpening a 3 or 6 mm chisel, simply place the blade spacer in one of the slots closest to the centre of the tool rest,. The next slot is for 9 – 15 mm while the outside slot for chisel up to 38mm. Fir blades that are wider i.e. plane blades, remove the blade spacer,. The blade will then be held against the shoulder of the base unit.
2. Select the desired grade of the diamond hone and place it in the hone holder (where it is held magnetically) you can work through all of the grades, course to fine.
3. Choose the angle required on the edge of the blade by loosening the handle and sliding the hone support to the required position, and then retighten the handle (only finger tight) the common angles are marked on the sliding home support and align with the datum line. You can also match the one holder to the angle that suits your tools from 23 degrees. Then secure the angle by retightening the handle.
4. Place the chisel against the blade support; you should notice that the chisel is virtually in the centre of the tool. With a slight lift of the handle you will feel the top sliding unit raise about 0.5mm. At this point gently slide the chisel along the side of the blade spacer and up to touch the diamond hone (do not force it against the diamonds hone)
5. Hold the chisel in place against the blade spacer and gently move the top carriage across the face of the chisel.
6. Take the chisel out and check if a burr has been produced on the back of the chisel. Use the backing-off tools to flatten the back of the chisel (use the finest diamond hone 1500 grit) Repeat steps 4 and 5 reducing the number of times you slide across the face of the chisel, i.e. 6 times, then five etc until you are happy with the edge. Each time, use the backing-off tool to flatten the back.
7. If your chisel has a polished back use the diamond foils (6 & 3 micron) in the backing-off tool to bring back to the polish.
8. Finally, you can finish off by ‘stropping’ the chisel on a piece of leather or a piece of card.