Small coffin smoothing plane

thingiverse

This is a prototype for a small 4-inch coffin-shaped woodworking smoothing plane. As this is a prototype, the tolerances are extremely tight. There are two models available: one that includes all parts to check assembly and another designed for easier printing and assembly. The model with all parts will push your patience to its limits. The bed angle of the plane measures 55 degrees. In the final version, the plane will be made from metal with dovetailed sides and a steel sole. The blade spine will be welded on. Note: The planes shown in the photos have had an hour or so of sanding on the sides and lever cap. ### Assembly Requirements To assemble this plane, you'll need: * 1/8" drill * #30 (0.1285") drill bit (optional) * Hand chuck to hold the drill for reaming holes without power * 1/4"-20 tap (maybe); I use a tap, but you might be able to clean the thread with a bolt * 1/4"-20 die (probably not), or a nut will work to clean the thread * 1/8" rod, 1.36" long (I use welding rod); steel or brass * Glue, such as "super" (CA) or hot for the front bun If you're assembling the model with separate sides: * Small triangular file (such as a saw file) to clean out the dovetails * Scraper (6" steel rule or back edge of exacto knife) to deburr edges; use a dragging motion (negative rake) ### Printer Settings Defaults: - Layer height: 0.15mm - Infill: 15% - Support: None - Brim: None Use these settings for the following files: xs4cp_sole.stl xs4cp_blade.stl - Use defaults. xs4cp_front_bun.stl, xs4cp_rear_bun.stl - Use **5% infill**. xs4cp_body.stl - Use your slicer to **add high detail** along the top edge (or it will be stepped). xs4cp_cap_screw.stl - Use your slicer to **add high detail** above the thread. - This part has a built-in brim and support. The support should only touch a single thread at three points and easily peel off. xs4cp_lever_cap.stl - Use your slicer to **add high detail** to the gentle horizontal slopes or they will be quite stepped. xs4cp_left_side.stl, xs4cp_right_side.stl - There is no good way to print these parts. Don’t print them unless you want to see how this type of plane is made (or as templates). - The "best" way to print these is on their nose (90 degrees) but will be ugly. - On the side: Step-O-Ramma (ugly) but top and bottom are nice. ### Assembly Assembly common parts: xs4cp_blade.stl xs4cp_capScrew.stl xs4cp_front_bun.stl xs4cp_lever_cap.stl xs4cp_rear_bun.stl ### Assembly with Integral Sides Add: xs4cp_body_stl - Machines the threads as needed. - Using the 1/8" drill in a hand vise, run it through the sides using care to line up both holes. If you use power, do it slowly and carefully. - Run the 1/8" drill through the lever cap and follow that with the #30 drill. This will make it easy to push the rod through. - Cut the 1/8" rod long, file the ends square and to length. Test fit in sides and lever cap then assemble. - Glue the front bun in place. - Slide (vertically) the rear bun into place. No need for glue. - Screw in the cap screw. - Slide in blade (logo to the front). - [Very lightly] tighten the screw. - Done ### Assembly with Separate Sides If not printed on the nose, fitting the sides is fiddly and tedious. Use a file and scrapers to remove flash and sag. Sanding will be needed somewhere for aesthetics. The dovetails are 60 degrees so a triangular fits but will not clean into the corners. Use an exacto knife there. Add: xs4cp_sole.stl, xs4cp_left_side.stl, xs4cp_right_side.stl ### Videos https://youtu.be/t6d92HS_wKg https://youtu.be/EYUWctHViiA