Expediting the Refacing of Engine Valves
Page 33
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rrHE use of portable, electric, hand tools was gradfally 1 increasing in popularity before the war, and there is no question that during the war enormous strides have been made. One interesting aspect of such equipment is found in the uses to which it is now put, such as cutting metal and wood, sanding, the driving of screws, and so on.
The most popular tool of this character is probably the drill, and where a large number of holes has to be made in a member which is not readily transportable or cannot conveniently be mounted under a drilling machine, then the portable electric is, at once, the answer.
A concern which specializes in portable electrical equipment of all types is S. Wolf and Co., Ltd., Pioneer Works, hanger Lane, London, W.5, and in addition to a representative range of electric hand drills, grinders, sanders and the like, it makes a useful precision valve refacer.
It is made in two types, one for dry grinding and the other for wet grinding, the respective types being known as VR 50 Mark 1, and VR 50 Mark 2. The motor is supplied wound for the following voltages:-100/120, 130, 200/220, and 230/250. Consumption figures are given as being approximately 320 watts running light and 480 watts on full load.
The net weight of the Mark 1 is 1 cwt. 10 lb. and of Mark 2, 1 cwt. 20 lb. Each machine is supplied complete with -two starting switches, 9 ft. of three-core C.T.S. cable, driving belts, 5-in. dia, grinding wheel, 4-in, wire scratchbrush, diamond stone dresser, collets and tools. There is also a number of accessories available, including special sollets for Ford valves.
Another piece of equipment in connection with the servicing of valves is the company'S'EVG 3 valve-seat kit, in which a Wolf high-speed valve-seat grinder is used. It runs at 16,000 r.p.m. light and will drive Valve-seating stones up to 3 ins. dia. There is a suitable seiection of stones in the kit and four self-centring arbors. The motor is of the universal type, the voltage range covered being the same as in the case of the valve-refacing tool.
The abbreviated Wolf catalogue which • we have just received shows a number of the principalltenas handled by the company.