Narrower Drive Belts
Page 63
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ADEVELOPMENT which should permit more compact arrangement of belt drives to engine auxiliaries has been announced by Ferodo, Ltd., Chapel-en-le-Frith. It is Poly-V belting -which, compared with conventional belts, provides greater torque capacity from a given belt width.
The new belt is ribbed longitudinally and runs on pulleys grooved to mate with it. Because of the grooving, Poly-V gives a much greater contact area between thc belt and the pulley than conventional types. It will transmit the Same power as normal singleand multidrive ' arrangements using narrower and smaller pulleys at closer centres.
Three rib widths are being manufactured, type 1,• type I. and type M, which are
-Ain., 716 in. and in. wide respectively. Width ofthe belt can be any multiple up to 16 of these three rib dimensions.
The belting is made from synthetic rubber on hightenacity synthetic cord. As the base rubber is softer than that employed normally for V-belt construction, the belting assumes a very close fit -with the pulley grooves.
Portable Power
AN oil-erigined generator set which -1--X weighs only 960 lb. but produces upto 175 amp. welding current is being manufactured by the Ashton Young Engineering Development Co., Ltd., 76 Cambridge Road, Kingston-uponThames, Surrey.
The set is mounted on a two-wheeled trolley and is known as the Youngster Power Pack Mark II. It consists of a two-cylindered oil engine driving a 7.5-kVA. generator. The control panel gives a 250-v. A.C. supply for lighting or power tools and a range of current for welding from 25-175 amp. at 50 cycles.
The trolley wheels can be retracted so that the unit rests on four anti-vibration mountings. If required, the Youngster can be mounted on a high-speed towing trailer.
Workshop Cupboard riA SMALL lockable steel cupboard produced by W. B. Bawn and Co., Ltd., Byron Works, Blackhorse Lane, London, E.17, costs £4 5s. It is known as the Dwarf and is 3 ft. high, 1 ft. 6 in.
wide and 1 ft. 3 in. deep.
The cupboard has an intermediate shelf and a full-length door secured by .a sixlever lock. As supplied, the cupboard is
finished in grey Stove-enamel and is knocked-down in a convenient pack. It cart .he put together easily by unikilled labour.
Reamer Range .
HUNGER reamers are now available again in this country from E. F. Allchin and Co., Ltd., -Bordesley Green, Birmingham 9. . The reamers are said to have more blades than normal and each blade is radially ground to give cutting without chatter" and long life.
Pilot and non-pilot reamers are available and a range of metric sizes is offered in addition to British types. Each tool is supplied in a sealed plastics container in which it can be stored after use.
Individual reamers can be obtained whilst sets of I 1 or 12 are offered in fitted wooden cases.
Thread Protection
P0 LYTH E NE caps, which fit over the clinch portion of their Philidas selflocking nuts to enclose the projecting section of bolt, are offered by Whitehouse Industries, Ltd., Ferrybridge, Knottingley, Yorks. The cap protects the thread from dirt and corrosion whilst improving the appearance of exposed fittings. Caps are available for most nut sizes and in five standard colours.