A simple tool for chisel and planer blade setup

[Hatchcanyon]

Economic setup tool

In case a bunch of irons should be sharpened with equal edge angles it is easy to economize setup. One has to set height of the Universal Support only once for all irons

Thic will be achieved that protrusion of the irons over the SE-77 edge is controlled easily.  Setting angle with WM-200 nedds only to be done once for all.

The handmade tool is especially economic in case the irons are sharpened and then polished on the SJ stone. Also there one need to control angle only one time. That means you may sharpen all irons first and polish them lateron. Changing the stone has to be done only once.

Princippally the method is the same as with turning tools and the TTS-100. The TTS-100 doen not fit very good on the SE-77 and the minimum protrusion of 50mm is too large for some irons. Using SE-77 and TTS-100 is nothing good for people with thicker fingers. 


TTS-100 for turning tools


Standard irons may be too short


Seen from the other side

One can see that the clamping part of the SE-77 has a bit of chamfer making a correct setting difficult.

Eventually the absolute amount of protrusion is not critical. It only has to be large enough to lift the SE-77 above the stone. With a edge angle of 25° anything larger than 32 mm will do. For larger angles the number may be decreased.

To conquer these difficulties with the TTS-100 a simple fixture was built from scrap you alway find in the shop. Nothing fancy!


Simple tool to set protrusion

The tool is aligned to the SE-77 outline. The only important thing is that the rabbet is parallel to the bottom.


A dowel secures the jig on top of my workbench


Applying the SE-77


Insertion of the iron


Setup of the WM-200


Setting the right angle

Setting the Universal Supprt to the right height above the wheel the edge angle is set.

Switching to the next iron is simple. Use the jig again and shift the iron down to the table top. You get exactly the same grinding angle as before.

Using the SJ stone for polishing makes the jig even more benefical. Grind and polishing stones may have different diameters. One can sharpen all irons on a SG or SB, then change the stone once and polish all irons in a batch, controlling the setup for polishing only once. (Again with WM-200)

Trying to polish chamfers on a polishing stone different in diameter to the grindstone will not work properly. Only a part of the chamfer will be  polished.


Switching to the SJ stone

The jig is useful for skewed irons too:


Setting a skewed chisel. The edge must rest over its full lenght on the table.


The skewqed chisel will be worked with the same angle than a straight one.

A mix of plane irons, straight  and skewed chisels within one grinding session is possible as long as all edges are intended to get the same angle.

Rolf

[Ken S]

Rolf,

A well designed and well made useful tool. Good work!

Ken