For the clamping cauls at either end have the clamps come in from the ends of the panel to get even pressure across all the joints. Long use a third set of cauls in the center.
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In this application they are used to bring into better alignment boards that are being edge glued to make a tabletop so its not as much of a problem if the pressure initially is all at the high center point until the cauls clamps are tightened.
Woodworking clamping cauls. Different Types of Lacquer. The picture below is an example of using them for panel glue ups. Cauls are used when clamping a panel or a project for glue up.
This applies the needed pressure all the way across the joint. They provide pressure in places beyond the reach of standard clamps or reduce the number of clamps required. Cauls can also be used to clamp plywood edge banding shelves into case work anywhere you need even clamping over a distance.
In todays woodworking video I show you how to make a quick and dirty shop jig to help you achieve perfect flat-panel glue-ups using clamping cauls. A caul simply spreads clamping force or redirects clamping force in a specific direction or area and can be an extremely helpful accessory to your woodworking efforts. In woodworking Cauls are beams that are used to distribute and direct clamping force over a long length.
Find thousands of woodworking supplies like drawer slides hardwoods cabinet hinges and knobs and pulls. Keeping Shelf Pin Holes Clear. Use a pair of cauls at each end of the panel but if the panel is more than about 2 ft.
By posting on this site and forum the poster grants to Canadian Woodworking MagazineWebsite the unrestricted rights to use of the content of the post for any purpose including but not limited to publishing the posted material including images in print or electronic form in a future issue or issues of Canadian Woodworking magazine or. For a caul to work properly and evenly distribute clamping pressure the cauls curve must be perfect. If youre clamping up oversized rough boards for a large tabletop cauls probably arent necessary but if youre working with thin edge trim or other delicate parts cauls are the difference between nice tight fitting joints and having to start over.
Get clamping pressure where you need it with easy shopmade cauls About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy Safety How YouTube works Test new features. The main use for cauls is to ensure clamping force is distributed across a larger area than just the head of the clamp. Tabletop glue-ups can be a bit tricky and the last thing you want is a bowed tabletop.
Calling them Cauls officially makes them tools so they dont get thrown out during shop clean up. This refinement is especially useful when its not possible to place a clamp. For example in the picture below Im using some special cauls to make sure the sides of this cabinet are straight.
Great suggestion for determining when enough clamping pressure has been applied to the cauls. For example in the picture below Im using some special cauls to make sure the sides of this cabinet are straight. For the center pair of cauls the clamps have to come in from the edges of the panel.
The crown of the cambered caul goes on the center of the joint and the ends get clamped down. One of their most common uses is in applying clamping pressure across the shelf dado in the side of a case piece where its imperative to achieve pressure across the entire joint. Mark Falter of Racho Palos Verdes California rigged-up his own pipe clamp cauls to apply pressure more evenly elevate the work piece off the table to add additional clamps and the added bonus is that the cauls eliminate any chance of unsightly jaw mar.
Their slightly curved shape helps apply pressure to places where clamps alone cant reach. Cauls are used when clamping a panel or a project for glue up. If you are like most woodworkers and have had less than satisfactory results when using homemade cauls it is most likely due to a less than perfect curve.
Lisa Morgan and Ed Pirnik. Plus Rockler has great tools like router tables clamps. Woodworkers discovered early on that by cambering a caul to create a belly at its center its possible to increase clamping pressure between the clamps that are positioned at each end of the caul.
Shop for Woodworking Tools Plans Finishing and Hardware online at Rockler Woodworking and Hardware. They provide pressure in places beyond the reach of standard clamps or reduce the number of clamps required. The trick is figuring out how much of a curve to put into the caul in the first place.
Figure 7 - Note the small bow as indicated by the center of this workpiece being slightly off the work surface. Cambered or curved cauls are a great resource to have in your glue-up arsenal. Cauls can be made out of any wood any size.
Generally they are just stout beams that are clamped at the ends.
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