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).
Visit from Morgan Crucible Co. Ltd. to discuss water pump glands and resulting conclusions.
| Identifier | ExFiles\Box 149a\3\ scan0243 | |
| Date | 6th July 1939 | |
| 1269. To By.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to By/Ald.{F. Allwood - Experimental Design} c. to Da{Bernard Day - Chassis Design}/Mo. c. to By/CS. Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards}10/JH.6.7.39. Visit from Morgan Crucible Co.Ltd. A visit was paid to R.R. Ltd. by Mr. Wyborn and Mr. Smith of the above Company, with the object of discussing water pump glands. We showed them drawings of the Vauxhall type water pump as tried on Wraith, both with the sealed ball bearing and the Ferobestos bearing, and also the drawing of our latest pump with the Morgan Stuart gland on the lines of that used by Humbers. General conclusions reached were as follows :- (1) It is essential to use a gland which incorporates a rotating carbon ring rubbing against a stationary metallic surface. (2) The metallic surface should have a Brinell of at least 130, and either cast iron or a phosphor bronze of fairly hard constituency. No.7 phosphor bronze supplied by the Phosphor Bronze Co. was recommended as being suitable. (3) The face of the metal surface should overlap the carbon ring to ensure that no tendency for the carbon to ridge can occur. Also a fine turned finish on the face is preferable to a smooth finish, as this has the effect of rubbing a certain percentage of the carbon into the metal face in the early stages of running and giving good bearing surfaces which do not appear to wear at all once initial bedding is completed. (4) No trouble occurs with the carbon powdering and tending to grind the faces and carbon was recommended for use on water lubricated bushes. (5) The spring loading on the gland rubber should be in the region of 3 - 4 lbs. (6) Our scheme as at present drawn out was not considered satisfactory from a production point of view as it was thought that difficulties would be experienced in fitting the rubber ring. We accordingly consider that | ||