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Read articles →Part 2 of a DIY backhoe thumb fabrication series for the Mahindra eMax 20S. This video documents the actual build process in detail, measuring and cutting steel plate arms, fitting and sizing bushings and pins (25mm and 3/4-inch), welding components with alignment jigs, and drilling adjustment holes at incremental spacing. It picks up mid-project, so watch Part 1 first. Best suited to hands-on owners comfortable with metalwork.
Posted by the RCAFpolarexpress channel; no channel description is provided, but the content suggests an owner-operator documenting a personal fabrication project.
The build uses a 25 millimeter pin with one-inch OD mechanical tubing bushings, plus a 3/4 inch pin on the other side with a compensating bushing.
The arms are clamped with 90 degree angle magnets and shims placed underneath to hold the correct angle before welding the first bushing in place.
A tab is welded at the end of the cam so the tempered pin can simply be unbolted and removed instead of needing to be cut or drilled.
Holes are drilled in half-inch increments along the arm so whichever hole suits best can be used for adjustment.
