ryandetzel Posted November 14, 2011 Report Share Posted November 14, 2011 I have this: http://www.rockler.com/product.cfm?page=21523&filter=vise I want to extend it to the right a little so I can hold a piece on the leg to work on the ends of the wood. Will this affect the integrity of the vise? Will is be stable enough? Quote Link to comment Share on other sites More sharing options...
ryandetzel Posted November 14, 2011 Author Report Share Posted November 14, 2011 50 people, no one has an opinion? :-) I guess I'll just do it and find out. Quote Link to comment Share on other sites More sharing options...
rmac Posted November 14, 2011 Report Share Posted November 14, 2011 If those fifty folks are like me, the honest answer to your question would be, "I don't know." No point in having fifty replies saying that. Even worse would be fifty misinformed opinions. So I think you've got the right idea. Try it, see what you think, and report back here to let everyone know what happened! -- Russ Quote Link to comment Share on other sites More sharing options...
Popular Post Beechwood Chip Posted November 14, 2011 Popular Post Report Share Posted November 14, 2011 It might cause some racking. I might put a spacer in the "main" vice area that is a little thinner than the piece you are clamping off to the side. That way, any racking will be minimized. 3 Quote Link to comment Share on other sites More sharing options...
soonerdg Posted November 14, 2011 Report Share Posted November 14, 2011 My apologies, I viewed earlier but had to run to a meeting. Are you planning to replace the entire jaw piece? If so, you shouldn't have any trouble at all. Typically these vices are sold without the jaw and you add one of the size you choose. So, putting a bigger jaw on the vise won't be an issue. If you're going to try to extend the jaw that's already on it I think that will cause problems. Not even sure how you'd attach it but the joint would definitly be a weak spot. Quote Link to comment Share on other sites More sharing options...
eric71m Posted November 14, 2011 Report Share Posted November 14, 2011 It might cause some racking. I might put a spacer in the "main" vice area that is a little thinner than the piece you are clamping off to the side. That way, any racking will be minimized. yep, what Beechwood Chip said! Quote Link to comment Share on other sites More sharing options...
ryandetzel Posted November 14, 2011 Author Report Share Posted November 14, 2011 This vice is not installed so I plan on just making the jaw larger. In all the pictures it looks perfectly equal on both sides and only about an inch off each side which made me wonder if there was a reason for this. Is there any reason I can't make the jaw 22"? Quote Link to comment Share on other sites More sharing options...
dwacker Posted November 14, 2011 Report Share Posted November 14, 2011 I would just install a twin screw and not worry about the issues. My guess is that you ill end up bending the vice or breaking the faces when it racks. Don Quote Link to comment Share on other sites More sharing options...
Darnell Hagen Posted November 14, 2011 Report Share Posted November 14, 2011 The farther you clamp from the guide rods the more racking will be an issue. Racking is when the front chop angles due to uneven resistance to clamping pressure. When this happens you're only clamping the inside edge of the stock, at less than full pressure. Racking is prevented by clamping over top of the screw, between the rods, or by using spacers the same size as your stock on the opposite side of the screw. Technically if you had a perfectly ridgid front chop and used accurately sized spacers you could have jaws the length of your benchtop. Quote Link to comment Share on other sites More sharing options...
ryandetzel Posted November 14, 2011 Author Report Share Posted November 14, 2011 The farther you clamp from the guide rods the more racking will be an issue. Racking is when the front chop angles due to uneven resistance to clamping pressure. When this happens you're only clamping the inside edge of the stock, at less than full pressure. Racking is prevented by clamping over top of the screw, between the rods, or by using spacers the same size as your stock on the opposite side of the screw. Technically if you had a perfectly ridgid front chop and used accurately sized spacers you could have jaws the length of your benchtop. Can you explain these spacers please? Quote Link to comment Share on other sites More sharing options...
Darnell Hagen Posted November 14, 2011 Report Share Posted November 14, 2011 Preventing Jaw Twist. A clever thing I've seen is making a spacer block in a 1-2-3 format, tripling it's range. Quote Link to comment Share on other sites More sharing options...
Beechwood Chip Posted November 14, 2011 Report Share Posted November 14, 2011 By a spacer, I just mean clamping a piece of scrap wood, the same thickness as your work piece, at the other end of the vice. Quote Link to comment Share on other sites More sharing options...
eric71m Posted November 15, 2011 Report Share Posted November 15, 2011 something like this is an excellent idea. http://lumberjocks.com/projects/55909 Quote Link to comment Share on other sites More sharing options...
Cynthia in BC Posted November 15, 2011 Report Share Posted November 15, 2011 It might cause some racking. I might put a spacer in the "main" vice area that is a little thinner than the piece you are clamping off to the side. That way, any racking will be minimized. +1 I agree with this. Quote Link to comment Share on other sites More sharing options...
ryandetzel Posted November 15, 2011 Author Report Share Posted November 15, 2011 something like this is an excellent idea. http://lumberjocks.com/projects/55909 That is perfect! Thanks. Quote Link to comment Share on other sites More sharing options...
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