1930s MG Tappet Spanner
The tappet spanner is used to adjust the concentric nuts on the 1930s OHC MG rockers. It is fitted with a .008" feeler gauge for adjusting the valve clearances..
Laser cut and milled HT steel blanks have been drilled for feeler gauge, and ground ready for polishing
Milling spanner faces for 7/16" BSF. Micro mill fitted with compound table, precision vice and parallel blocks.
Lapped and polished, maker mark and MG part number hand engraved.
Forge tempering at Kowhai Forge
Forge tempered spanners air cooling to achieve surface hardening and gunmetal colour
Lathing rivet burr 1040 steel. rivet machined in aluminium
Finished spanner, feeler gauge side
Finished spanner, engraved side