ridged band saw

In Europe these tools are known as Tirfor hand winches. In the US they are branded Griphoists. They are also sometimes sold as scaffold hoists. This diversity indicates their astounding versatility for moving heavy things by hand. They do the work of motorized winches--haul logs, or move stuck tractors, raise towers, and so on--but with the deftness of a human hand. Because there is no ratchet or coil, a Griphoist permits very small adjustments, unlike either come-alongs or winches. The patented double-grip mechanism of the Griphoist/Tirfor is considered so reliable that some versions of the unit are rated by the UL to be suitable for hoisting humans--for instance in hoisting window-washers'' scaffolding.

PERFORMANCE: Water depth--360''; Drilling depth--30,000'', leglength--511 ''.QUARTERS: 82 persons.HULL: 243'' x 206'' x 26''.VARIABLE LOAD: 5,000 kips.HELIPORT: 73'' dia., Sikorsky S-61N.STORAGE: Mud & Cmt Bulk--11,000 cu f; LiquidMud--2,500 bbl; Fuel--2,074 bbl; Water forDrilling--11,622 bbl; Potable Water--1,714 bbl;Brine/Base oil--1,100 bbl/670 bbl.DRILLING EQUIPMENT: Drawworks--Nat''l 1625-UDBE,3,000 hp; Pumps--three Nat''l 14-P-220,2,200 hp; Prime movers--five Cat 3516 B, ea.1,850 hp; Rotary Table--Nat''l D-495; Pipe Handling

Though light in weight, Airbor magnetic drill has a powerful 1.6-hp air motor and 1,600-lb magnetic holding strength. With its extra rack, stroke length is extended to 10 1/4 in. Annular cutter capacity is up to 2 1/16 in. diam. Geared chuck adapter converts the unit to a standard drill press. The Slugger Air Force pneumatic drill, at 24 lbs, 6 1/4" high, is useful for confined area drilling. The drill''s features include a permanent magnet that turns on or off by air power, a cutter capacity of up to 1 1/16" diameter x 3/4" depth and the ability to use ShortSlugger cutters and frame cutters. These cutters'' geometry allows the operator to drill multi-layered truck frames in a single pass.

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