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• WAYS AND MEANS.

6th July 1926, Page 47
6th July 1926
Page 47
Page 47, 6th July 1926 — • WAYS AND MEANS.
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Working Methods Suggested by Our Driver and Mechanic Readers.

LAPPING-IN bearings calls for some convenient form of tool, and an ingenious type is suggested by

of Manchester. This accessory can be made at home quite simply and the materials are generally to hand.

First of all, tart a block of hard wood of suitable size and, using a lathe, bore it out somewhat larger than the journal to be treated, thus allowing for a fair thickness of lead lining. Next, cut it through so that it is in halves and in each portion drill two or more blind holes at about 45 degrees to the horizontal axis.. The purpose of the holes is to provide crevices into which the molten lead can run and afford a firm hold in the wood.

When this has been done make a core of wood slightly less than the diameter of the journal for which the lap is _being made and then place the core in position between the wooden blocks, which are clamped together, pouring in the molten lead. This will not do any harm to the wood, but only make it smoulder. When the metal has cooled down bore it out to the required diameter and then drill two holes through the wooden blocks to accommodate the clamping bolts, which are used in conjunction with a clamp ingplate and a long handle, in. by 2 ins. flat iron being used for the plate and handle.

IN the workshop large tubes often

have to be out off with a saw, and there is a difficulty in marking them off squarely. " F.H.," of Bath, suggests taking a piece of notepaper or card which has the ends absolutely at right angles to the sides and wrapping it round the pipe. When the ends meet properly, the sides will form a'. guide for the scriber or pencil.

THE rods used in bonnet hinges often

work out, forwards or backwards, and "B.L.R.," of Llanllyfni, suggests a cure. On one end of the rod he fixes a cap by means of a rivet rind turns a thread on the other end of the rod, on to which he screws 'another cap, in this case, of course, threaded internally. In order to allow clearance for the two caps, the bonnet has to be filed, but the whole job is essentially simple and can be done in a short time

SECURITY and quick operation are

claimed for an alteratkl, suggested by ".r.S.," of Dunfermline, in the construction of tank or radiator-filler Nips. He files all the threads off the inside of the cap and the neck of the radiator or tank and makes circular grooves on the neck. In the cap he drills a hole at one side and obtains a steel ball one or two sizes larger than the hole. On the outside of the cap he solders an old tyre-valve cap; this has its open end sawn away so as to leave two small projections which are turned over at right angles and soldered to the cap. Before the soldering operation, however, a light spring is put inside the cap, then the ball and the cap aria fixed in position.

Thus the ball is pushed partially through the hole in the cap and acts as a spring plunger, registering in the grooves in the neck, preventing it being shaken off byvibration, but offering an easy and quick method of fixing.

SOLID tyres which creep on their rims are dealt with in a simple way by_ "J.W.T.," of Llantrisant. He bores four holes, each of 2-32 in: diameter, at equal distances around the. rim between the band tyre and the wheel. Next the holes are tapped in. Whitworth thread and four grub screws are fitted,in them, which lock the tyre base to the wheel band and thus prevent movement.

MANY Vehicles use grease in the

gearbox and rear axle, and trouble is sometimes experienced, particularly in cold weather, when the grease doe--; not run until it is warmed up. In the meantime the gears have to revolve in channels cut in the grease and are, consequently, partially or wholly unlubricated. It is a good idea, says "

GAL.," of Washington, to pour a little engine oil into the grease from time to time to ensure lubrication until the heat generated becomes sufficient to cause the grease to run.

WHEN dismantling a chassis it iq often difficult to prevent the ball hearings from getting mixed up with other parts which are in a gritty condition. In many cases ball'bearings are thrown with other parts into a bath • of paraffin, and all are washed together. All those parts which are exposed are heavily coated with road grit, which is held in suspension in the paraffin and is thus carried into the races and cages .of the balls, from which it cannot easily be dislodged.

Some mechanics hold that swilling the bearing well in paraffin or petrol is the right Course, but if the bearing he spun round it will be found to go in jerks, and to make a noise which indicates the presence, of particles of foreign matter, and no matter how vigorously the swilling be continued, thenoise will still be heard. A bearing that is really clean should run silently, and no bearing • should be , replaced until it does run silently.

The best way to clean a bearing is to loosen the heavy grease with a brush and paraffin, 'then place it under an ordinary water tap, using as good a force of water as possible, and spinning the hearing all the time. The water will drive all grit before it and make the bearing perfectly clean. The bearing will now be full of water, although free from grit, so the next thing is to free it from the water ; this is easily done by placing it in water so hot that it will evaporate on removal. While this is going on the bearing should be shaken and spun, and in a few minutes it will be perfectly dry, when it should be fed with clean oil, and wrapped in paper until required. Bearings so treated will be found to run perfectly silently.

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Organisations: US Federal Reserve
Locations: Manchester, Bath, Washington

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