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

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.  

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. 

Lapped and polished, maker mark and MG part number hand engraved. 

Forge tempering at Kowhai Forge 

Forge tempering at Kowhai Forge 

Forge tempered spanners air cooling to achieve surface hardening and gunmetal colour

Forge tempered spanners air cooling to achieve surface hardening and gunmetal colour

Lathing rivet burr 1040 steel. rivet machined in aluminium

Lathing rivet burr 1040 steel. rivet machined in aluminium

Finished spanner, feeler gauge side

Finished spanner, feeler gauge side

Finished spanner, engraved side

Finished spanner, engraved side