Woodworker's Journal 2009-33-2, страница 64
Today's Shop ▼ Get a Grip on Woodworking Clamps By Sandor Nagyszalanczy PRO TIP: Black pipe will stain a wood workpiece if it comes in contact with wet slue. Prevent stains by leaving space ^ between the pipe and the wood in freshly glued areas. style #56 Jorgensen and Woodstock International D2838, are useful for clamping thick or wide assemblies. on't let the extreme variety of clamps confuse you — our expert provides the background you need to be in the know. Crank-handle Bar Clamps With their thick square-section threaded screws, crank-handle bar clamps generate enough clamping pressure for the most difficult clamping situations, like straightening bowed boards during glue-up or pressing too-tight joints closed. Most of these bar clamps feature either steel or aluminum bars. Steel-beamed bar clamps, such as the Jorgensen 7200 series, are the strongest, but they're very heavy — and expensive. For everyday duties, aluminum bar clamps like the Rockier Sure-Foot™ clamps are less expensive and easier to handle. For thicker stock or wider assemblies, choose clamps with deeper jaws. Clamp kits, such as Veritas panel clamps or Wood River's clamping system, are a cost-effective alternative to ready-made bar clamps; you make the wood bars yourself. Handscrew-tightened Bar Clamps True woodshop workhorses, handscrew-tightened bar clamps are useful for all manner of clamping in the shop and on the jobsite. With an adjustable lower jaw that slides on In the workshop, clamps keep things together: parts held firmly on a bench during sanding or chiseling; plywood pieces kept in alignment as screws or nails are driven; boards pressed together as they're glued into a wide panel. But just like tools, there's no single clamp that's right for every woodworking task. This article surveys the entire range of clamps and accessories, to help you decide which are best for your woodworking projects. duty 1/2-in.- or heavier duty 3/4-in.-diameter pipe clamps that thread onto standard galvanized or black pipe. For really large, long work, you can add extra length to any clamp by attaching another pipe with a threaded connector. Pipe clamps with deeper jaws, like the Pipe Panel Clamps Most often used for clamping boards glued edge-to-edge and large plywood carcasses, pipe clamps are a popular choice for budget-oriented craftsmen: you purchase the clamp hardware and add your own pipe, cut as long or short as you wish. You can choose between lighter- Our author gives you a clear view of your options among the wide variety of clamps available to woodworkers today. 64 April 2009 Woodworker's Journal |
