Crane boom, mast and base fabricated from heavy-duty welded constructed structural steel pipe and tubing that limits deflection and meets ASTM standards.

Sheave adjusts to 4 different positions along boom, and boom angle adjusts in height with an easy-to-use adjustment screw.

Thern davit cranes can be configured with a spur or worm gear manual winch or power winch. Choose from Thern’s spur or worm gear hand winches or power winch with 115/1/60 as standard. Other voltages available as well as pneumatic, hydraulic or DC Volt power operation.

TThe winch mount plate adjusts to 3 different positions on the mast and is easily removed with quick connect pins. Rotational handle attached to winch mounting plate.

Electrostatic powder coated crane and stainless steel fasteners combine to resist corrosion in harsh environments. Other options available include: galvanized, stainless steel and epoxy finishes.

Roller/ball bearing allows smooth and easy 360° crane rotation under load.

Quick-release clevis style stainless steel pins allow for easy assembly and quick disassembly for transport or storage. No tools required.

For quickly attaching or removing wire rope equipped with a swaged ball fitting. This allows the operator to leave the wire rope attached to the load at all times and simply remove the rope from the winch and attach to the optional wire rope keeper, cable reel or standard keyhole slot on pedestal and wall mount bases.

Pedestal, flush, and wall mount allow for a variety of mounting solutions and are easily installed. Heavy-duty base cap included with lanyard keeps water and debris out of base when crane is removed. Standard powder coat finish on pedestal, flush and wall mounts. Other finish options available including galvanized, stainless steel and epoxy finishes.

Industry-leading two-year limited warranty on all our products.

Torque controlled expansion anchor bolt kits.

• Carbon Steel Anchor Kit AN62A-6 – Carbon steel anchor body, nut and washer with type 316 stainless steel expansion sleeve. Size: 5/8 inch x 6 inch.
• 304 Stainless Steel Anchor Kit AN62A-6S – Type 304 stainless steel anchor body, nut and washer with type 316 stainless steel expansion sleeve. Size: 5/8 inch x 6 inch.Approx. ship weight: 2.3 lb (1.0 kg).

Keeps cable taut when no load is attached. Attach to cable.

• HB10-12-25 – Red Enamel Steel, 1/8 to 1/4 inch wire rope.
• HB10S-12-25 – 304 Stainless Steel, 1/8 to 1/4 inch wire rope.
• HB10-25-38 – Red Enamel Steel, 1/4 to 3/8 inch wire rope.
• HB10S-25-38 – 304 Stainless Steel, 1/4 to 3/8 inch wire rope.Approx. ship weight: 10 lb (4.5 kg).

RW50 – Keeps wire rope neat and safe when not in use. 316 stainless steel reel winds up wire rope when detached from crane. Suitable for wire ropes up to 5/16 diameter, capacity will vary. Not designed to hold a load. Rated capacity: 50 lbs. Approx. ship weight: 12 lb (5.5 kg).

Wire Rope Capacities • 3/16 inch wire rope, 140 ft • 1/4 inch wire rope, 75 ft • 5/16 inch wire rope, 50 ft

RK19-25S – 304 Stainless steel metal bracket attaches to base or other structure to hold free end of the wire rope when detached from crane. Not designed to hold a load. Approx. ship weight: 1 lb (0.45 kg).

• ED330-DW11 – 120 VAC, 11 amp, 330rpm drill-motor to power drive the hand winch. Only available for cranes configured with the M2 winch option. Includes 1-1/8” hex drive socket.
• ED300-DW06 – Cordless drill kit, 60 V Brushless Motor, 300rpm drill-motor to power drive the M2 hand winch option. Includes 1-1/8” hex drive socket.
• ED400-DW09 – Heavy Duty Cordless drill kit, 60 V Brushless Motor, 400rpm drill-motor to power drive the M2 hand winch option. Includes 1-1/8” hex drive socket.

Upon request, Thern can test your crane prior to shipping, up to 125% of rated load. Contact factory for pricing and availability prior to order.

Extend our standard 2-year warranty to 5 years. Contact factory for pricing and availability prior to order.

Available upon request at time of order. Contact factory for pricing and availability prior to order.

CE and ATEX certifications available. Contact factory for pricing and availability prior to order.

Special configurations for use in explosive settings available. Contact factory for pricing and availability prior to order.

AC electric in any voltage. DC electric, hydraulic and pneumatic power winches available.

Thern can build the high quality controls you need to operate your equipment.

A worm gear hand winch is also available for operation with a drill motor option.

Add an emergency safety shut-off to ensure safe operation.

Customization is available for almost all Thern products and should always be performed by our engineers to assure the changes meet our stringent quality standards. Below are some of our more common customization requests. Only factory modifications are covered under warranty.

• Longer Lift Distances Customized winch and crane configurations to accommodate longer lifts.
• Custom Colors & Finishes Custom colors and finishes are available to match your unique application.
• Extended Boom and Masts Thern can extend mast heights and boom lengths to fit your needs.
• Relocate the Winch The winch can be relocated to fit confined spaces or height restrictions.
• Special Bases Custom bases or mounting requirements can be manufactured to meet your unique situation.