I have two leg vises, neighter is a pinless system but i like both of them and use them full time. I also I have an end vise which has its own uses. So this isnt because i need a vise, just intrested in the pinless idea and want to build one. I have looked at all the different pinless systems i can find online and one i seen at a woodworking show. There seems to be something lost in the whole idea. All we want to do is keep the outer chop paralle to the inter chop (leg). To do this many have spent a great deal of money on hardware and made it a lot of work to do. I do have to say that i like the man from England’s idea the best, simple but expencive, well expencive to me. I decided that one should be able to make an inexpencive pinless paralle guide that stays paralle when a work piece is tightened in the chops. To make the guide bar stay parallel when tightened we need to keep the guide bar from moving upward. This is proven with the linier bearing system. So to make something that does this and not cost an arm and LEG, I came up with this idea or option as it is. Keeping the paralle guied bar held down with opening and closing seems like a good idea. How much pressure down is yet to be determined, but i dont believe it to be much. What I see is a false streacher built to set on top of the guide bar and be fully adjustible. The false streacher can be a simple piece of hardwood thick enough to have a dado cut into the bottom side of it and sets over the guide bar by about a haft inch. This half inch dado or groove will help keep the paralle guide bar alined and limit the movement side to side of the lower end of the chop. The false streacher is held in place with two 1/2” stainless bolts set into the top of the false streacher, one on each end of the top side. This is as simple as drilling a hole one half inch deep for the head of the 1/2” bolts to set into. I believe epoxy would do fine here. These 1/2”bolts. would have their threads extending upward and into a block that is attached to the front and rear leg ofthe workbench. With nuts and washers on each end of the two blocks you could adjust the false streacher up and down to adjust the pressure needed to keep the chop paralle when tightened. Once the false streacher is adjusted, then no need to adjust the false streacher again on each closing of the chop and no pin to move. I believe it will work and will build one to see. So whats your thoughts on this idea???
|Blog entry by benchbuilder||posted 10-27-2013 04:12 PM||903 reads||0 times favorited||1 comment|