RJW-1 manual/servo mini winch

The RJW-1 is a compact, lightweight, collapsible, portable winch perfect for shallow water marine operations.  It mounts to a pedestal so it can be used on the edge of a dock or fixed in a small boat or dinghy for versatility in research locations.

It can be configured as either a purely manual winch that can be hand-cranked or driven with a drill, or as an electric winch with a small servo motor and chain drivetrain for more power.

This unit is completely assembled and ready for purchase.

Features on this winch include:

    • Pedestal for mounting the winch
    • Folding extendable cable guide sheave wheel
    • Rolling trundle transportation wheels
    • Bearings with thermoplastic housings and stainless steel inserts
    • One-way drum ratchet + sprocket-assisted manual backup auxiliary drivetrain for easier manual recovery of heavy payload
    • Can be optionally outfitted with a slip ring if needed, depending on slip ring requirements

The servo-drive configuration includes:

    • Electric servo-motor drivetrain with built-in holding brake

The manual-drive configuration includes:

    • One-way drum ratchet to prevent drum unwinding during hand cranking
    • Hand crank + drill-drive adapter

Standard specs:

Drum 6.625″ core x 7″ width x 10″ flanges

 

Servo motor configuration specs:

Drivetrain Nominal 1HP 1800RPM motor w/ 112:1 overall speed reduction
Approximate line pull 170lbs @ core
142lbs @ full drum*
Approximate line speed 0.48 m/s @ core
0.43 m/s @ full drum*
Input power 48VDC
Approximate winch weight 45lbs **

* Full drum = 1″ free flange

** Sans drum cable

 

Drill drive configuration specs:

Drivetrain 1/2″ chuck drill connected directly to the drum axle (i.e. no mechanical advantage gear reduction between drive input and drum)
Approximate drill drive line pull (based on specs of Makita 6013BR) 23lbs @ core
19lbs @ full drum*
Approximate drill drive line speed (based on specs of Makita 6013BR)
 5 m/s @ core
5.6 m/s @ full drum*
Approximate winch weight ~35lbs **

* Full drum = 1″ free flange

** Sans drum cable

 

Manual configuration specs:

Drivetrain 8″ length hand crank connected directly to the drum axle (i.e. no mechanical advantage gear reduction between drive input and drum)
Approximate hand crank line pull (assuming 10lb hand crank force)  20lbs @ core
15lbs @ full drum*
Approximate hand crank line speed (assuming 50RPM hand crank speed)
 0.45 m/s @ core
0.54 m/s @ full drum*
Approximate winch weight ~35lbs **

* Full drum = 1″ free flange

** Sans drum cable