winches: technical information
WINCH POWER AND MAXIMUM FORCE
To calculate the
maximum force (F), first use the tables to find winch power (P). Assuming
the efficiency is 70% and the maximum force exerted on the handle is 30
kg, the maximum force obtainable will be:
F = 20xP (kg) i.e. twenty
times the winch power.
For example, for a model with a winch power 50,
the maximum force would be F = 20x50 = 1000 Kg
RECOVERY SPEED
The recovery speed (S) is the length
of line recovered with one turn of the handle. It is the converse of the
winch power (P), and can be calculated using the formula: S = 1600/P
(mm)
For example, a model with winch power 50 would have a recovery
speed of S = 1600/50 = 32 mm for each 360° turn of the handle.
WINCH MOUNTING
Line drum lead angle: it is correct to provide an angle of between 2 and
10 degrees. It is advisable for the output gear of 2 speed models to be
positioned with respect to pull direction F, as shown in the figure
(90°).
SPRING-LOADED SELF-TAILING
The new self-tailing
winches with spring-loaded disks adapt automatically to even the thinnest
lines. It is recommended the line being used have at least three wraps around
the drum, otherwise excessive load on the selftailing plates could cause
the line to slip.
MAINTENANCE
Clean the winch by removing any old
grease with a solvent (e.g. using diesel fuel). Spread a thin layer of marine
grease (e.g. teflon grease) on all moving parts. Grease will protect aluminium
from corrosion (where contact with dissimilar metal occurs). It is useful
to use some grease especially on stainless steel screws, threads and stainless
washers. For a complete documentation ask for the "Winch User's Guide".
LUBRICATION
For winch and gear lubrication, use Type 400 (green)
with Teflon. Antal can supply this grease in 100gr tubes.
SPARE
PARTS
Antal can supply you with a universal repair kit suitable for
all winch types, including 4 pawls, 4 pawl springs, 1 circlip.