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DRILLING MACHINES
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BLACK AND DECKER LTD.
Canon Lane, Maidenhead, Berks.
THIS well-known maker offers drills from + in. to 14 in. capacity in a wide range of styles and speeds.
There are more than 20 pistol or one-handed models with twist drill sizes up to 4 in. GD5 and GD10 are described as Holdrills. GD20 is a twospeed Holdrill, GD 15 a Scrudrill and GD25 a heavy-duty type for use with twist drills up to in. when drilling through steel, 4 in. for masonry and 1 in. if used on hardwood. The GD25 will accommodate a holesaw with a 2+ in. bit.
The GD30 pistol will drill al in. hole in steel without using a stepped twist drill.
There are seven spade-handle drills and six rnorse taper drills.
There are 11 two-handed operation models with twist drill sizes for steel ranging from in. to I in.
BOSCH LTD. 20 Carlisle Road, London NVV9 ROSCH offers 12 universal hand-held electric drills, all double-insulated and supplied with 10 ft. 3-core cable. The models:
Slim-grip: 1/100, + in. and 8/107, a in. Pistol: 8/109, 4 in.; 8/110, a in.; 8/193, I in. Two-speed pistol: 8/111, + in. and 8/105, + in.a in. Heavy-duty pistol-grip: 1/101, 4 in Two-speed heavy-duty pistol-grip: 1/102, A in.-4 in. Twospeed heavy-duty with side handles: 1/103, 4 in.; in. Masonry single-speed impact and rotary: 8/170, 4 in. Masonry or normal heavy-duty impact and rotary two-speed: 1/170, + in.-14 in.
There are also five pneumatic drills: 7/106, + in.; 7/107, in.; 7/101, + in.; 7/102, in.; and 7/103, in.
Bosch does not supply drill-bits of its own manufacture.
DESOUTTER BROS. LTD.
The Hyde, Hendon, London NW9
FROM miniature, air-operated in. 4 lb. models to 4 in. 12 lb. Rackfeed ... the Desoutter range of drills is most comprehensive.
The straight-case air-operated Mighty Atom and miniature types are intended for drilling small holes with extreme accuracy. Types: M.63A, a in.; M.10, L in.; M.10X—as M.10 but with flanged case for machine-mounting.
The larger Mighty Atom types have capacities of a in. and + in. and speeds between 310 and 2,500 r.p.m.—MA.1, MA.13, MA.22 and MA.29. Supplying 50 per cent more power are the Power Atom drills PA.1 (+ in., 2.500 r.p.m.) and PA.2 (4 in., 4,000 r.p.m.).
Six air-operated Super Rotor heavy-duty straight drills are claimed to be the smallest and lightest of their types: SR.5/33, I in., 3,000 r.p.m.; SR.5/21, in., 2,100 r.p.m.; SR.5/10, in., 1,000 r.p.m.; SR.6/10, + in., 1,000 r.p.m.; SR.6/50, in., 500 r.p.m.; SR.6/35, 4 in., 350 r.p.m.
Three Mighty Atom types of a in. capacity enable holes to be drilled to within 14 in. of the inside face of a right angle: M.2 has a 90 deg. angle head, M.3 a 30 deg. angle head and M.70 a 360 deg. adjustable offset head. There are also 11 rotor-type corner drills offering a wide range of speeds with a in. and 4 in. capacities.
There is a twin-spindle (P.8) drill with a 4 in.
capacity. Six counter-sinking drills and 19 other straight and rotor types.
With speeds ranging from 5,000 to 450 r.p.m., Desoutter's DG series of electric drills is one of the most comprehensive available, JD.500 and JD.250 are telescopic nose jig drills; CD.140, CD.250 and CD.500 are close-corner types.
Fitted with + in. or in. chucks or Morse taper spindles are the four Desoutter heavy-duty twospeed electric drills.
B. DRAPER AND SON LTD.
Chandler's Ford, Hampshire.
A UNIQUE machine with two geared spindle speeds and one direct, is this company's 7512/3 Metabo electric three-speed drill with + in. steel and 1 in. wood capacities.
Also in its Metabo range: 7508/2 super-heavy-duty, two-speed indus trial drill gun; in. (steel) and + in. (wood). 7509/2 heavy-duty, two-speed, spade-handled; in. (steel) and in. (wood). 7523/2 pistol-grip, side-handled heavy-duty two-speed; in. (steel) and 114 in. (wood), 75116/2 two speed extraheavy-duty impact (four degrees) with capacities of in., in., 1,i in., 1-1in. and 3+ in. 75119 extra-heavy duty impact (four degrees) with capacities of 4 in., l in., 4 in, and 41 in. 7516/2 super-heavy-duty, two-speed; + in. (steel) and lf in. (wood).
All Metabo drills are double-insulated and there are several attachments and accessories.
INGERSOLL-RAND CO. LTD.
165 Queen Victoria Street, London EC4
THIS company offers a in. automatic air-. powered drill with a two-stage trigger valve for easier starting. The drill—D90-----also features a built-in power regulator and has a comfortable handle. Its speed is 2,100 r.p.m, and weight 21 lb.
MARRON MACHINES LTD.
37 Queensberry Station Parade, Edgware, Middx. DOUBLE-INSULATED and with a high power/weight ratio are the four electric drills in Marron's Super Stork range, all available in 110 V or 240 V.
The models: TP6, + in. (steel) and tin, (wood), 2,200 r.p.m.; TP8, a in. (steel) and a in. (wood), 1,200 r.p.m.; TP10, in. (steel) and in. (wood),
950 r.p.m.; and TP13, in. (steel) and 11 in, (wood), 750 r.p.m.
SKIL (GREAT BRITAIN) LTD. 59 High Street, Hounslow, Middx. Sni, offers four industrial drills featuring its Van-Tour-System which, by using a siliconcontrolled rectifier in the switch circuit, enables the operator to choose any speed between zero and each drill's maximum r.p.m.
The chuck capacities are + in., a in., in., and + in. Ball-bearing construction and double protec Lion against motor burnout add to the dependability of this new line of versatile drills.
STANLEY BRIDGES LTD.
York Road, Battersea, London SW11.
COSTING between £6 19s. fid. and £14 19s. 6d,, the seven-model Stanley Bridges power drill range is unconditionally guaranteed for 12 months.
The in. Wasp has a no-load speed of 2,250 r.p.m. With the same capacity, the DR2T has a light-load speed of 2,950 r.p.m. and its singlespeed twin the DRCD has an automatic overload cut-out.
There is the a in. two-speed (2,950 high, 980 low) DR4T and the Double Diamond, identical but with automatic overload cut-out.
The in. Colourmatic has an exclusive electronic Dial-A-Colour control which allows the operator to vary speeds infinitely between 900 and 3,000 r.p.m. The firm also markets a plug-type control, the Van-Speed, which gives the same advantage to any make of power drill.
WOLF ELECTRIC TOOLS LTD. • Pioneer Works, Hanger Lane, London W5.
THE Wolf Sapphire range of all-insulated heavy-duty drills can be used with a two-core cable without earthing. Pistol-grip, Sapphires are available in + in., a in., in., and in. capacities.
There are also eight Grand Prix drills, single, two-speed and rotary percussion, in sizes from f in. to in., and nine other low-speed, two-speed, heavy-duty and rotopunch rotary percussion drills from + in. to If in.
Wolf also offers a wide range of drill stands and accessories, including an angle-drilling attachment.