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).
Sketches and measurements checking for squareness and eccentricity on Bentley rear axle pinion components.
| Identifier | ExFiles\Box 84\4\ scan0169 | |
| Date | 9th January 1929 | |
| FIG. A COMPANION FLANGE -.0055" * 5 -.0005" -.00475" * 6 -.00025" -.002" * 7 -.000 -.00375" * 8 +.00025" -.0055" * 2 -.0005" -.00525" * 3 -.00025" -.003" * 4 -.0005" 1 (MARKED) .0000 .0000 * CONVEXITY OF COMPANION FLANGE FACE '.003' TO '.004' OUT OF TRUTH ON O.D. '.0005' READINGS TAKEN ON END CAP BETWEEN STUDS. MARKED WITH *. (MEASURED BY FIXED POINT ON COMPANION FLANGE.) 1 " " " COMPANION FLANGE " " UNMARKED. FIG A.{Mr Adams} (FROM A FIXED POINT READING ON FACE OF FLANGE AS IT REVOLVED.) 2 INSIDE STUDS FIG B FIG B COMPANION FLANGE -.00025" 2 1 (MARKED) 0 150° FIG C ARROW SHOWS POSITION OF CLOCK GAUGE WITH PINION IN POSITION IN HOUSING & MOUNTED ON DOUBLE ROW DOUBLE PURPOSE BRG. READING ON COLLAR WITH R.B. IN POSITION. '.003' ECCENTRICITY FIG D ARROW SHOWS POSITION OF CLOCK GAUGE READING ON COLLAR, R.B. REMOVED. MOUNTED AS ABOVE. '.0055' ECCENTRICITY NOTE: HIGH SPOT ON COLLAR IS IN SAME PLACE WHEN CHECKED BETWEEN CENTRES. FIG E ARROW SHOWS POSITION OF CLOCK GAUGE READING ON R.B. INNER TRACK '.0015' ECCENTRICITY WHEN MOUNTED IN CASING AS ABOVE & WHEN REMOVED FROM CASING. PINION SHAFT FIG. F PINION OUT OF CASING. PINION SHAFT & COMPANION FLANGE COMPLETE WERE EXAMINED IN E.I.D. RESULTS WERE AS FOLLOWS:- FACE OF FLANGE (M.M.) '.0006' OUT OF TRUTH. BOSS OF FLANGE (F.F.) '.0017' OUT OF TRUTH. ALL OTHER DIAMETERS & FACES (K.K.)(S.S.)(H.H.)(J.J.)(Z.Z.) WERE WITHIN '.0003' OUT OF TRUTH. DIAMETER (Z.Z.) WAS '.0037' OUT OF TRUTH. BEARING HOUSING FIG. G FLANGE FACE '.0015' OUT OF SQUARE WHEN REVOLVED ON BEARING. O.D. OF HOUSING HAS '.0015' ECCENTRICITY. HOUSING WAS EXAMINED IN E.I.D. RESULTS WERE AS FOLLOWS:- CONCENTRICITY OF E.E. WITH B.B. '.0003' " " E'E' " B.B. '.0005' O.D. SQUARE WITH B.B. TO '.0005' A.A. " " B.B. " '.0054' C.C. " " B.B. " '.0005' FACES A.A. & C.C. ARE '.00075' TO '.0015' OUT OF PARALLEL. END CAP FIG. H FACE O.O. SQUARE WITH BORE TO '.0025' " P.P. " " " " " O.Q.E. SPIGOT Q.Q. CONCENTRIC WITH BORE '.003' FACE O.O. OUT OF TRUTH WITH P.P. '.0025' BORE Q.Q. SLIGHTLY TAPERED & A BAD SHAPE GENERALLY. INNER RING OF DOUBLE ROW DOUBLE PURPOSE BRG FIG. J INNER MOUNTED ON PINION SHAFT TEST ON CENTRE SHOULDER 'U' FOR OUT OF TRUTH '.001' WHEN INNER WAS CLAMPED " " " " " '.0015' " " " UNCLAMPED N.B. THE HIGH POINT WAS IN THE SAME POSITION ON BOTH READINGS & COINCIDED WITH THE HIGH POINT ON THE COLLAR. PARALLELISM OF FACES X X & X' X' = '.0001' X.X. SQUARE WITH 'U' TO '.0002' CENTRE SHOULDER CONCENTRIC WITH BORE BY '.001' FIG. K FACE R.R. OUT OF SQUARE TO EXTENT OF '.0015' IN 3 3/4" LENGTH. THE TWO BORES ARE CONCENTRIC. SKETCHES OF COMPONENT PARTS OF 'BENTLEY' REAR AXLE PINION MEASURED & CHECKED FOR OUT OF SQUARE ETC. TR{Capt. F. W. Turner - Finance} 73 RANSOME & MARLES NEWARK TEST REPORT N= 7488 EWH 9.1.29 | ||