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

Boom extends to four positions with quick-release pin and adjusts angle with ratchet.

Thern davit cranes can be configured with a manual winch for short, infrequent lifts or a power winch for longer lifts or heavier loads. Choose from Thern’s spur or worm gear hand winches or power winches with 115/1/60V as well as pneumatic, hydraulic or DC Volt power operation.

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.

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. 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 or cable reel.

The sheave clevis pin is D-Shaped to prevent the clevis pin from rotating when under light loads.

A variety of Thern winches can be attached to the bracket. After a winch is attached, the bracket is easily mounted (without tools) to the crane via quick-connect pins.

A cap on top of the mast helps keep weather and debris out of the mast.

The new rotation handle position does not interfere with the operation of the boom angle adjustment screw jack.

Nylatron bearing allows smooth and easy 360° crane rotation under load.

Pedestal, flush and wall mount bases allow for a variety of mounting solutions and are easily installed to a variety of solid surfaces with anchor bolts or other fastening methods. Bases sold separately. Base cap included with lanyard keeps water and debris out of base when crane is removed.

Industry-leading two-year limited warranty on all our products. Learn more or register your products here.

Torque controlled expansion anchor bolt kits. Approx. ship weight: 2.3 lb (1.0 kg).

• AN62A-6 Carbon Steel Anchor Kit Zinc plated steel anchor body, nut and washer with type 316 stainless steel expansion sleeve. Size: 5/8 inch x 6 inch.
• AN62A-6S Stainless Steel Anchor Kit Type 304 stainless steel anchor body, nut and washer with type 316 stainless steel expansion sleeve. Size: 5/8 inch x 6 inch.
• AN62A-6S316 Stainless Steel Anchor Kit Type 316 stainless steel anchor body, nut, washer and expansion sleeve. Size: 5/8 inch x 6 inch.

Keeps cable taut when no load is attached. Attach to cable. Approx. ship weight: 10 lb (4.5 kg).

• HB10-12-25 – Red Enamel Steel, 1/8 to 1/4 inch wire rope
• HB10-25-38 – Red Enamel Steel, 1/4 to 3/8 inch wire rope
• HB10S-12-25 – 304 Stainless Steel, 1/8 to 1/4 inch wire rope
• HB10S-25-38 – 304 Stainless Steel, 1/4 to 3/8 inch wire rope

Assembly includes both roller/ball bearing and lock.

• Roller/Ball Bearing — Optional on the Commander Series Davits, the specially designed roller/ball bearing allows smooth and easy 360° crane rotation under load.
• Stainless Steel Lock — Stainless steel lock assembly holds crane in desired position during operation and when not in use. Locking positions at 30° increments. Included only with roller/ball bearing.
  • 5PT20BRG – 11 lb (5.0 kg)    5PT20BRG-S – 11 lb (5.0 kg)

Base extension is ideal for use with the flush or wall mount base options to maintain crane height for obstacle clearance or when additional 15” height is required.

• 5BE20-15 – Powder Coat – 53 lb (25 kg)
• 5BE20-15G – Galvanized – 53 lb (25 kg)
• 5BE20-15S – Stainless Steel – 53 lb (25 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, wire rope capacity will vary. Not designed to hold a load. 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

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.

• RK19-25S – 304 stainless steel – 1 lb (0.45 kg)
• RK19-25S316 – 316 stainless steel – 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.

ATEX certifications available. Contact factory for pricing and availability prior to order. Explosion Proof Classification, special configurations for use in explosive settings available. Contact factory for pricing and availability prior to order.

AC electric available in other voltages. DC electric, hydraulic and pneumatic power winches available.

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

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.