crystalltiice
Aluminum
- Joined
- Jul 31, 2015
Hi Guys,
I just bought two old gun drill sharpening fixtures made by SIG (Schweizerische Industrie-Gesellschaft) (Typ: 37.096.006 and Typ: TBS 5-12) and I'm trying to figure out how to use them. I have no gun drills on hand to try but was hoping some one with a similar fixture could advise.
They look similar to this except for the chuck part: http://www.teco.net.au/wp-content/uploads/2010/05/gun-drill-sharpening-fixture.jpg
I'll post a picture of the actual one I have soon.
It has a rather peculiar chuck for holding the drill - a triangle piece inside the chuck rests in the V groove of the drill and then as you tighten the chuck, a finger presses the drill from the opposite side against the triangle piece so the drill, regardless of its size is always centered, at least much better than any other fixture I've seen.
It does not have any graduations for rotating around the drill axis but rather has some pins on a collar and another locking pin on the body to engage with them. Almost like a spin indexing fixture/ rotation stop.
Two pins are close together and as such when engaged with the taper locking pin, they will stop drill rotation, I assume this is when one is grinding the cutting edge. Engaging the locking pin in other places will allow a large but limited range of rotation between the pins.
I'm assuming it is for grinding the back relief? These pins are fixed and not adjustable, I think there are about 3-4 of them.
The actual spindle also runs eccentric and there are some graduations on it just behind the chuck head, the strange thing is that it is marked from I think 1-13 on both parts of the assembly? It looks to adjust the amount of eccentricity, locked in place by a knurled ring which I can't get loose.
The spindle part has a few knurled rings with holes for a C spanner. I'm not sure if they are used for locking the rotation or only adjusting end play. The only ones that are moveable seem to adjust end play/lock rotation. The others are stuck and I'll have to first make a spanner to be able to loosen them to see what they do.
I have no experience sharpening gun drills but saw a nice video but with another type of fixture, it does however show the various angles on the drill tip. I assume that once I put a drill in the thing and go through the motions it will make more sense but I was hoping that someone with experience with one of these SIG fixtures can shed some light on it.
I contacted UNISIG as they seem to be the new owners of this product line of the original company but have yet to receive any reply. Hours on google has not yielded any results either. I'm really hoping someone on here has some insight!
I just bought two old gun drill sharpening fixtures made by SIG (Schweizerische Industrie-Gesellschaft) (Typ: 37.096.006 and Typ: TBS 5-12) and I'm trying to figure out how to use them. I have no gun drills on hand to try but was hoping some one with a similar fixture could advise.
They look similar to this except for the chuck part: http://www.teco.net.au/wp-content/uploads/2010/05/gun-drill-sharpening-fixture.jpg
I'll post a picture of the actual one I have soon.
It has a rather peculiar chuck for holding the drill - a triangle piece inside the chuck rests in the V groove of the drill and then as you tighten the chuck, a finger presses the drill from the opposite side against the triangle piece so the drill, regardless of its size is always centered, at least much better than any other fixture I've seen.
It does not have any graduations for rotating around the drill axis but rather has some pins on a collar and another locking pin on the body to engage with them. Almost like a spin indexing fixture/ rotation stop.
Two pins are close together and as such when engaged with the taper locking pin, they will stop drill rotation, I assume this is when one is grinding the cutting edge. Engaging the locking pin in other places will allow a large but limited range of rotation between the pins.
I'm assuming it is for grinding the back relief? These pins are fixed and not adjustable, I think there are about 3-4 of them.
The actual spindle also runs eccentric and there are some graduations on it just behind the chuck head, the strange thing is that it is marked from I think 1-13 on both parts of the assembly? It looks to adjust the amount of eccentricity, locked in place by a knurled ring which I can't get loose.
The spindle part has a few knurled rings with holes for a C spanner. I'm not sure if they are used for locking the rotation or only adjusting end play. The only ones that are moveable seem to adjust end play/lock rotation. The others are stuck and I'll have to first make a spanner to be able to loosen them to see what they do.
I have no experience sharpening gun drills but saw a nice video but with another type of fixture, it does however show the various angles on the drill tip. I assume that once I put a drill in the thing and go through the motions it will make more sense but I was hoping that someone with experience with one of these SIG fixtures can shed some light on it.
I contacted UNISIG as they seem to be the new owners of this product line of the original company but have yet to receive any reply. Hours on google has not yielded any results either. I'm really hoping someone on here has some insight!