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).
Detailed condition report on a gearbox, including wear measurements for various components.
| Identifier | ExFiles\Box 91\4\ scan0283 | |
| Date | 3rd October 1935 guessed | |
| 5. GEAR BOX. General condition good. Casings. All bores checked and found correct for alignment. Gears. Apart from slight damage on engaging ends and faint markings on flank of teeth all gears proved to be in satisfactory condition. Splined gears and sliding pieces show slight radial movement relative to shafts, particulars of which are given below. - 1st Speed Driving Gear - .001" Splined Sleeve (1st Driving Gear) - .001" 1st Speed Constant Mesh Gear - .0025" Sliding Piece (3rd & 4th) - .007" (excessive) Shaft (2nd speed) - .0005" 2nd speed Driven Gear - .001" 2nd Constant Mesh Gear - .0015" 3rd Speed Driving Gear - .001" SHAFTS 2nd Motion Shaft is slightly worn on the splines at points corresponding to the 3rd, reverse and constant mesh gear position. The ball race is an easy fit and has been creeping on the 3rd motion shaft. SELECTOR MECHANISM. Only slight wear has taken place on the side faces on the 2nd speed operating stirrup, but there is appreciably more on the 3rd and 4th speed stirrup G.81737: the total wear amounts to .024. There is very slight wear at the fork on the 3rd and 4th selector shaft and also at the fork on the 1st speed selector. BEARINGS & BUSHES The 1st motion shaft bushes are lightly scored and worn. The front half of the floating bush in the 3rd speed driven gear is seized to the 3rd motion shaft. All Ball bearings show some sign of wear or pitting on the tracks and are noisy when spun by hand. SYNCHRO MECHANISM. There is slackness in the rivets securing the synchro cone to the 3rd speed driven gear. All the plungers in the 3rd and 4th speed sliding | ||