From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Investigation into slack and wear issues on an Inertia Balance Lever Assembly for a Bentley Chassis.
| Identifier | ExFiles\Box 102\6\ scan0193 | |
| Date | 14th August 1937 | |
| To RHC{R. H. Coverley - Production Engineer} c. to HPS.{Horace Percy Smith - Experimental Factory Mgr} c. to Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} GWH{George W. Hancock - Head Chateauroux} 4 RHC{R. H. Coverley - Production Engineer}/Cy.1/LS.14.8.37 BENTLEY CHASSIS. INERTIA BALANCE LEVER ASSEMBLY. On investigating we found this is one of the earliest type made before forgings for the levers were available. No evidence is available as to where the job was made, Works or Experimental Department. The allowable slack between the pins and holes of connecting link GB.2387 is .001 but by taking all adverse limits this may be increased to .005. In the case of pins K.6704 and K.6715 these are all on the minus limit in addition to .0015 wear. The holes in the link are oversize giving a total slack of .007 - .0075. The oilite bushes have not given satisfaction as the spindle is badly rusted. The allowable slack between the balance lever spindle and bush is .004 with a possible .0045, before pressing in bush, and .001 - .002 after fitting to lever. We are taking up with the Works, to see that drawing limits are not exceeded in any direction and that assemblies with minimum slack are fitted up, pending the modifications suggested by HPS.{Horace Percy Smith - Experimental Factory Mgr} RHC{R. H. Coverley - Production Engineer}/Cy. [Signature] | ||