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SPANNERS OF A KIND.

12th December 1922
Page 29
Page 29, 12th December 1922 — SPANNERS OF A KIND.
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Which of the following most accurately describes the problem?

Useful Suggestions from Our Driver and Mechanic Readers.

T is extraordinary that, after all the years that have passed since the first bolt and nut were made, so 'little progress has been made towards perfecting that simple tool, the spanner. Inventions galore have successfully passed. the careful scrutiny of the Patent Office examiners, yet there appears to be nothing to-day to surpass, fm-all-round utility, the plain open jaw-ended spanner, when it is a good fit on the nut to which it is applied. Anyhow, some of our driver-readers have ideas of their own on the subject, and although there is not much to choose between the following letters, the 15s. prize should go,' we think, to " H.A.B.," of Rotherham. not so much, perhaps, for his spanner extension, as for the description of the method of removing nuts which have become fixed to their bolts.

As regards the extension, he very wisely suggests that this should be retaitied for use only in connection with the nuts of large bolts, and should most certainly not be used on those of less than in. Whitworth thread. Any injudicious use will most likely result in breakage of the bolt, which will " twist off " under the strain. The design of the tool is obvious from the sketch, as also is the manner of its use. It needs only to be stated that it is made of cast steel (tool steel) of a section which varies according to its size. The actual example which was responsible for this contribution was a particularly large specimen, and was wrought from a piece of material 1 ins. thick, 5 ins, wide, and 3 ft. long.

All sorts of suggestions have been published on this page IVOlfIl time to time for the removal of nuts which are so fast upon their bolts or studs as to be irremovable by ordinary methods. The following, which also is put forward by " 1.I.A.B.," strikes us as hew, and, in the circumstances named, practical: Drill a diameter hole in the nut, as shown in the sketch. i. Procures or mike

a suitable taper punch, in diameter at the small,end. Drive it into the hole until.it buiests the vnut,'•which. will then come away' quite easily.

" H.11:," of Highgate, is concerned with that too familiar nuisance—a spanler which is a little too large in the jaws

for the nut which it is required, to manipulate. Take a piece of sheet iton, says H.H.," of the required thickness to pack. the spanner, and cut and bend it round one side of the jaw in the manner illustrated by the sketch. When in place, as shown, it cannot fall off and may he entirely forgotten, except for the service it is rendering

" O.A.C.," of Stockwell, comments in a critical mood on a rather crude method.

of removing a valve cap which a reader described on this page some months ago He suggests that in:such a case whei_ the hexagon ortoctagon exterior of the nut is so worn as to be useless, and when the cap is tight stuck in the cylinder head, the best thing to do is tactual four small holes in the cap and make a double-ended peg spanner, as shown in the sketch. The cap is unharmed and the spanner, a useful addition to Use kit, is there for subsequent use in similar cases.

It is not a far cry from a nut to a split pin. Indeed, some of our readers may think that, in dealing with the nut first, We rather puts the cart before the horse. Anyhow, the accompanying sketch from " H.A.B. ". of Rotherham, whether early or late, is, nevertheless useful. It shows a split-pin e.ytractor. A piece of mild-steel hi is bored and cut to shape as shown. The split-pin extractor is pointed and bent at one end to engage the head' of the pin, and. formed into a loop at the other to accommodate the user's finger.' eThe-met,hod of use is obvious.

In cases where the hole in the bolt is so low down that a full aperture. for the insertion of the pin is not available, the pin must be filed flat. This is best accomplished by' laying it flat on a block of wood, .‘estraining it from movement by means of a nail or two, holding the wood in the vice.

The simplest tool of all is the spanner sketched by " "W_J.H." for removing wing nuts. It needs no description and he has sent none, and the dimensions given will suit most wing nuts.

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