RETIRED
26th June 2010, 10:08 PM
As stated in this thread the tool rests on the VB72 weren't desirable.
They were pattern makers rest and not suitable for my style of turning.
Pic of old rest. Too flat across the top.140560
The bore size of the remote rest is 11/2" or 38mm.
My supplier only had 36mm solid rod, no 40mm to machine down for the posts.
I noticed that the original rests were also 36mm (maybe they had the same problem:D) so I locked one in and tried to move it. Nice and secure so 36mm it is.
The actual rest was going to be out of 75mm x 12mm flat bar as I have plenty of that for the tool rests on "Big Henry".
So with all the material it is time to start.
I wanted to make 4 rests from 100mm -400mm and settled on 100mm, 250mm, 300mm and 400mm.
400mm is the longest length on a 36mm single post that is acceptable before you get vibration at the ends.
The posts were cut at 250mm long so that the post was supported by the complete bore of the banjo at full working height.
The post is set up in the banjo ready for slotting.140555
The cutout to take the rest is cut using a 1mm (like to meet the person that invented them) disc in an angle grinder.140556
The placement of the tool rest on the post is important and one where a lot of manufacturers fall down.
The top edge must clear the banjo so that you can get it as close as you want without the timber striking the edge of the banjo that the post goes into.
To achieve this I use a square on a magnet. If you have 2 people a straight edge will do the same thing.140558
Too far back. As you can see the banjo would hit the timber and the rest would be nearly an inch from the work.140562
The rest in the right place.140557
Now it is a matter of tacking it into place.140559
With one tack square the rest to the post.140563Note the centre mark (circled).
Second tack.140561
Now weld right up. If using thinner material be careful that you don't overheat it or it will pull into a slight curve.140564
They were pattern makers rest and not suitable for my style of turning.
Pic of old rest. Too flat across the top.140560
The bore size of the remote rest is 11/2" or 38mm.
My supplier only had 36mm solid rod, no 40mm to machine down for the posts.
I noticed that the original rests were also 36mm (maybe they had the same problem:D) so I locked one in and tried to move it. Nice and secure so 36mm it is.
The actual rest was going to be out of 75mm x 12mm flat bar as I have plenty of that for the tool rests on "Big Henry".
So with all the material it is time to start.
I wanted to make 4 rests from 100mm -400mm and settled on 100mm, 250mm, 300mm and 400mm.
400mm is the longest length on a 36mm single post that is acceptable before you get vibration at the ends.
The posts were cut at 250mm long so that the post was supported by the complete bore of the banjo at full working height.
The post is set up in the banjo ready for slotting.140555
The cutout to take the rest is cut using a 1mm (like to meet the person that invented them) disc in an angle grinder.140556
The placement of the tool rest on the post is important and one where a lot of manufacturers fall down.
The top edge must clear the banjo so that you can get it as close as you want without the timber striking the edge of the banjo that the post goes into.
To achieve this I use a square on a magnet. If you have 2 people a straight edge will do the same thing.140558
Too far back. As you can see the banjo would hit the timber and the rest would be nearly an inch from the work.140562
The rest in the right place.140557
Now it is a matter of tacking it into place.140559
With one tack square the rest to the post.140563Note the centre mark (circled).
Second tack.140561
Now weld right up. If using thinner material be careful that you don't overheat it or it will pull into a slight curve.140564