Pipe Hacksawing Guide Clamp

thingiverse

I needed to cut some 25mm pipe with a hacksaw because I'm making an MPCNC but I couldn't get the cut straight and the saw kept skipping. So I designed this little guide clamp device: you put two guides surrounding where you want to cut with two protective shims between and the saw can only go along the line of the guides. The guides are tightened with an M4 bolt. The shims ensure a sawblade-width gap; they are intended to be cheap and sacrificial preventing the saw from eating the guides. When the shims are worn print more. They have a little stand-off built on to them to help set the channel for the blade mine was 1mm wide - without the stand-off it's hard to judge the separation and the shims tend to stick together. You need to fit an M4 nut and (20mm) bolt for each guide so you can tighten them onto the pipe. The OpenSCAD file is included so you can easily change the bolt size or adapt it for different pipe diameters. Instructions Print two guides and two shims Fit nuts and bolts to the guides so they can be tightened. Fit one guide to the pipe and add a shim with stand-off facing away from guide. Line up the edge of shim with the cut-mark on the pipe and securely tighten the guide's bolt into place. Fit the other shim and the other guide mirror image to the first one. Make sure the shim stand-offs aren't lined up or you'll get a double width channel push the second guide against its shim and secure it. Wobble the shims around so the stand-offs are at the bottom otherwise you'll saw them off. They do take damage as the cut finishes but I've managed several cuts before the shims are unusable. Start sawing place saw-blade between the shims and saw gently at first as you create a groove use long smooth sawing actions as much as you can finish gently so the saw doesn't erupt out at the end. When done remove guides and file away any sharp edges. Print Settings Printer Brand: Ultimaker Printer: Ultimaker 2 Rafts: No Supports: No Resolution: 0.1mm Infill: 50%+ Notes: Nothing complicated here. Post-Printing Add a nut and bolt so you can tighten the guide onto the pipe. How I Designed This All designed in OpenSCAD; design is completely parameterized so you can trivially change the pipe diameter the nut and bolt or whatever.