MIL-PRF-12065E
with respect to installation and performance on winches. The winch shall be the latest model of
the manufacturer's standard commercial product equipped as specified herein and shall have
been in production, marketed and in use for a minimum of one year preceding the solicitation for
procurement. The introduction of normal product improvement changes in this one year period
is acceptable.
*Rated load: Measured with a single layer of rope on the drum.
3.4.1 Gear cover. The winch shall be equipped with a gear cover.
3.4.2-. The winch shall be equipped with a lever operated, band or disc type
handbrake and it shall be accessible for examination and adjustment. The brake shall control and
hold the load under maximum load conditions without assistance from the ratchet.
3.4.3 Cranks. Power for the winch shall be supplied by one or two adjustable length
crank (s) with rotating hand grips. Two or three gear ratios shall be provided which shall be
selected by changing the location of the crank(s) from the drum shaft to the geared shaft(s). The
effort for each crank shall not exceed 25 Ibs underrated load conditions.
3 . 4 . 4 - . All bearings shall be of the sealed, anti-friction or replaceable bushing
type (see 4.3.1).
3.4.5 4.5 Wrinch drum and wire rope The winch drum, flanges, and braking surfaces shall
be machined to a finish not rougher than 250 microinches. The winch drums shall each have
wire rope capacities as specified in table I. Unless otherwise specified (see 6.2), the wire rope
shall conform to RR-W-410, type 1, class 2, preformed, uncoated, regular lay. The wire rope
diameter and length as specified in table I for the applicable sized winch shall be furnished
installed on the drum. A swivel hook having a safety factor of not less than four shall be
furnished and installed in the wire rope by means of a thimble, swaged type pendant fittings, or
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