Opinions and Queries
Page 49
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ACTION ON STANDARD NOMENCLATURE
THE article headed "Standard Nomenclature Needed," in the issue of "The Commercial Motor" dated September 26, is noted with considerable interest. The matter is already under active consideration, and a similar step is being taken with the National Caravan Council, which is actively engaged in producing a standard for caravan nomenclature in collaboration with the Society.
The original S.M.M.T. Standardization Committee is now known as the B.S.I. Automobile Industry Committee, and, therefore, there is cline co-operation between the B.S.I. and the Society.
G. F. P. Fox, A.M.1.MEcH.E., A.M.I.A.E.,
A.F.R.AE.S., M.S.A.E., Standards Manager, Society of Motor Manufacturers and Traders. London, W.I.
HOW TO CURE BEARING TROUBLE 'VTR. S. A. BEABEY (" Opinions and Queries,"
September 26) can overcome his trouble fairly easily by fitting a sleeve between the bearings and clamping the outer bearing hard up against it. It probably pays to make 'the. sleeve.on the short side and use thin steel shims -for adjustment purposes. This will eliminate all wear on the axle tube and, provided that care is taken to keep bearings, sleeve and shims together when dismantling, bearing adjustment is automatic upon assembly.
There does not appear to be any community ol thought among designers upon the method of locating wheel bearings, for A.E.C. and Leyland rigidly clamp rear-wheel bearings against sleeves, whereas Dennis, E.R.F. and others allow the inner-bearing track to turn on the axle tubes. , I question whether taper-roller bearings are as good as parallel-roller journals for rear-wheel bearings where the load is principally radial. Parallel-journal bearings have the advantage that they cannot be overtightened upon assembly and when failure does occur it is free from that wedging action which does so much damage in a taper-roller-bearing collapse.
Your leading article on nomenclature (September 26) is timely: looking up various makers' catalogues for parts can be a severe headache. Take, for instance, the split-tapered cotters used for locating the spring collars
on engine valves. These are termed by A.E.C. as "valve bush-split," by Leyland, • "split cone," and by Dennis, "cotter for valve." • An illustrated catalogue (of which the Gardner is a fine example) has much in its favour, for nomenclature
then becomes less important.
Mr. R. W. Bent's article on lubrication (September 26) is interesting, but I think he omits to stress one
important point—that is, lack of space for an efficient filter on the modern vehicle. The full-flow type chokes up fairly quickly on a worn engine and it is difficult to see how this is to be avoided unless a filter the size of
a five-gallon drum is used. The chemical by-pass type undoubtedly keeps the oil clean during the effective life of the element, but because of space cmisiderations, it requires renewing too frequently.
J. L. G. BREWSTER.
J. Brewster and Co. (Transport Engineers), Ltd. Newcastle-on-Tyne.
WHAT SHOULD THEY PAY-THEIR DRIVERS?
WE shall be glad to know where we can obtain details " of the wage scales for lorry drivers. Some time ago
you published a table of such scales, which we found most useful, but we understand that you no longer print this. We shall be glad to know, however, what alterations have been made, as some of our drivers believe that they are being underpaid. We may add that we are operating under a C licence. C.S. London, E.C.1, [As you are not a haulage concern but operate under a C licence, you ape not bound to the same wages as must be paid to drivers engaged on haulage work. We may add, however, that many ancillary users do follow these rates either completely or fairlk closely; there are others who pay scales more related to the industries in which they are engaged. Actually, haillage wages have been increased several times since we published our chart, and it would be best for you to obtain the latest scale from the offices of the 'Road HaUlage Wages Board, Queen Anne's Chambers, 28, Broadway, London, S.W.1. 1 he reason we discontinued publishing 'our chart was because, although many people found it most usef01, the demand was too small to justify the work and expense involved in preparing and printing thern.—E.] DATA ON OIL CONSUMPTION REQUIRED WE would be glad to learn, if possible through your " columns, whether any road passenger transport operators have kept any records of rear-axle oil con
sumption on Leyland and A.E.C. passenger vehicles If so, we would be much interested to receive any data on
this subject. W. EMMERSON, Bishop Auckland.