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SOME HELPFUL TOOLS.

14th April 1925, Page 29
14th April 1925
Page 29
Page 29, 14th April 1925 — SOME HELPFUL TOOLS.
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Which of the following most accurately describes the problem?

Various Suggestions by Our Driver and Mechanic Readers.

items referred to this week are 1 those which are not generally included in the standard tool kit, the necessity for which arises, however, at certain intervals.

When the job of boring plates or similar parts arises, it is often found that the punch mark can be made only on one side, whereas the work of drilling from that side is not always easy or even possible. The necessity arises, therefore, for correetly locating a corresponding punch .mark on the opposite side of the part to be drilled, and for this purpose " W.A.,"of Stratford-onAvon, has devised a small tool which appears to be of practical value. This week's prize of 15s. is awarded to him.

An old machine hacksaw blade is taken and the teeth ground off, the softened blade is then bent into the shape of a pair of. sugar tongs and the ends made equal. A small hole is drilled through both ends of the tongs at one operation to ensure the holes being immediately opposite each other.

In practice, the punch mark is made on one side of the object in the normal manner, and the tongs are then slipped over the plate until the hole in one of the arms covers the punch mart. By fixing the tongs firmly, another mark may be made to correspond on the opposite side of the plate through the hole in the other arm of the tongs. Accuracy is thus ensured and the method of use is quite a simple one.

DRIVERS of chain-driven vehicles know only too well the difficulty which is experienced in fitting chains, owing to the large amount of force which has to be exerted to bring the ends together in order to join them.

" E.L.J„" of Liverpool, suggests a small tool which obviates the necessity for forcing the chain over the sprockets in the manner which is sometimes employed for fitting belts. Two long bolts are obtained, one screwed with a right-hand thread and the other With a left-hand thread. The hexagon heads are cut oft and the plain ends of the bolts are bent to form hooks. A long nut of suitable dimensions is made up with threads cut in opposite directions at its ends, into which the hooked bolts are screwed.

By applying one hook to each end of the chain and screwing up the central nut, the chain ends are brought together so that the join may be made. The hooks, of course, are, not applied to the rollers of the extreme end links, but to the rollers which are either the second or third from their respective ends. In this way there is a certain amount of loose chain at both ends inside the hoots, and this may be moved about until the coupling can be fixed conveniently.

A WHEEL extractor is a handy

appliance in many instances, but the cost is somewhat prohibitive if the necessity for its use is very infrequent. " II.C.F.," of Sheffield, forwards a description of a device which he has constructed for the purpose.

Two mild-steel plates 18 ins, long ts)., 2 ins, wide of -I-in. section are taken, and metal blocks 2 ins, long by 1 in. wide, with a depth of 14 ins.,, are placed between them and the whole assembly is fastened together with 3,16 in. rivets. In the centre of the box-like assembly a flanged metal block is inserted. A hole is drilled through the centre of this block through its greatest length, which is afterwards tapped with a Fin. Whitworth thread. A Fin, screwed bar 6 ins. long with a square head and a blunt point is passed through the block.

Two claws are now necessary, and these are constructed of mild steel 12 ins, long by 1 in. by J ins, with a hook at one end, being at right angles to the major portion. Holes -are drilled 2 ins, apart through the Claws in such a manner that a pin may be passed through each claw to locate it, the pins, of course, are employed on the side of the main body farthest. from. the work.

LUBRICATING leaf springs greatly facilitates their working and imprOves the suspension of the vehicle. " of Rotherham, has made a tool to enable him to oil the springs without difficulty : this consists of a type of screw clamp which has one fixed jaw of wedge shape, whilst the moving jaw is similarly formed and slides on the square shank of the tool.

The main feature of the device is that lubricating holes are drilled through the wedges of the jaws so that oil may be introduced between the spring leaves after the clamp has been screveed home to separate the leaves. For a vehicle of 2 to 3 tons capacity, " H.B." 'suggests the following dimensions: overall length, excluding the screwed bar, 12 ins.; distance between fixed jaw edge and inner side of the shank 4 ins.; the body itself. is of 1-in. square metal, and the setewed rod I in. diameter.

THE necessity for lapping out the cylinder block of an old vehicle caused " W.E.W.," of Shefford, to work out the following method.

A piece of wood was turned up so as to he a good fit in the cylinder. While still in the lathe it was smeared with emery powder and oil, which were thoroughly rubbed in. The cylinder block was placed over the wooden "lap" and held firmly. The lathe was started up and the cylinder carefully manipulated so that it was parallel to the rotating wooden bar, in order to prevent the formation of a "bell mouth" in the cylinder block. A fairly high speed was used and the cylinder removed from time to time for examination and the application of fresh grinding compound.

The time taken was approximately half an hour, and " W.E.W." reports that the cylinder was lapped out to a satisfactory extent with only very slight Signs of eccentricity.

Tags

People: mark may
Locations: Liverpool, Sheffield

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