Welded Steel Construction
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 while with an easy-to-use adjustment screw.
Manual or Power OperationThern 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.
Adjustable Winch Mount PlateThe 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.
Corrosion Resistant Finish
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.
Tapered roller bearing allows smooth and easy 360° crane rotation under load.
Easy Assembly/DisassemblyQuick-release clevis style stainless steel pins allow for easy assembly and quick disassembly for transport or storage. No tools required.
Quick Disconnect AnchorFor 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.
Variety of Bases (sold separately)Pedestal, flush and wall mount bases 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.
Two-Year Warranty
Industry-leading two-year limited warranty on all our products.
IMPORTANT:
It is the owner’s or operator’s responsibility to determine the suitability of the equipment to its intended use. Study all applicable codes, manuals and regulations. Be sure to read the Owner’s Manual supplied with the equipment before operating it.
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Min Pos B4
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Max Pos B1
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|
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M1
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M2
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M3
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E2
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(ft)
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(m)
|
(ft)
|
(m)
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(in)
|
(mm)
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(ft)
|
(m)
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|
|
|
|
|
0
|
0
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5
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1.5
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3/16
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4.8
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20
|
6.0
|
•
|
—
|
•
|
—
|
|
8
|
2.4
|
13
|
3.9
|
3/16
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4.8
|
28
|
8.5
|
•
|
—
|
•
|
—
|
|
16
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4.8
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21
|
6.4
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3/16
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4.8
|
36
|
10.9
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•
|
—
|
•
|
—
|
|
25
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7.6
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30
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9.1
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3/16
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4.8
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45
|
13.7
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•
|
—
|
•
|
—
|
|
40
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12.1
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45
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13.7
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3/16
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4.8
|
60
|
18.2
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—
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—
|
•
|
—
|
|
55
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16.7
|
60
|
18.2
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3/16
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4.8
|
75
|
22.8
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—
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—
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•
|
—
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|
0
|
0
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5
|
1.5
|
1/4
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6.4
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20
|
6.0
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—
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•
|
•
|
•
|
|
8
|
2.4
|
13
|
3.9
|
1/4
|
6.4
|
28
|
8.5
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—
|
•
|
•
|
•
|
|
16
|
4.8
|
21
|
6.4
|
1/4
|
6.4
|
36
|
10.9
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—
|
•
|
•
|
•
|
|
25
|
7.6
|
30
|
9.1
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1/4
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6.4
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45
|
13.7
|
—
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•
|
•
|
•
|
|
1 Lift below floor level varies depending on boom position and base configuration. For longer lifts, please contact factory.
2 Performance Characteristics are for standard products referred to in the owner’s manual. Non-standard products may vary from the original design. Contact Thern, Inc. for this information.
3 Wire rope assemblies include a hood and swaged ball fitting to work with quick-disconnect anchor on winches, cable spooler and wire rope keeper. 316SS wire rope is also available. Please contact the factory.
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(lb)
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(kg)
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(in)
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(mm)
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(in)
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(mm)
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A-1
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500
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226
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17
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431
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74
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1879
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A-2
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400
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181
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22
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558
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79
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2006
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A-3
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300
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136
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28
|
711
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87
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2209
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|
A-4
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250
|
113
|
36
|
914
|
96
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2438
|
|
B-1
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500
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226
|
14
|
355
|
76
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1930
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|
B-2
|
400
|
181
|
17
|
431
|
83
|
2108
|
|
B-3
|
300
|
136
|
22
|
558
|
91
|
2311
|
|
B-4
|
250
|
113
|
28
|
711
|
101
|
2565
|
|
|
1 Lift below floor level varies depending on boom position and base configuration. For longer lifts, please contact factory.
2 Performance Characteristics are for standard products. Non-standard products may vary from the original design. Contact Thern, Inc. for this information.
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(lb)
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(kg)
|
(in)
|
(mm)
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(in)
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(mm)
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|
A-1
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500
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226
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17
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431
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60
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1524
|
|
A-2
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400
|
181
|
22
|
558
|
65
|
1651
|
|
A-3
|
300
|
136
|
28
|
711
|
73
|
1854
|
|
A-4
|
250
|
113
|
36
|
914
|
82
|
2082
|
|
B-1
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500
|
226
|
14
|
355
|
62
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1574
|
|
B-2
|
400
|
181
|
17
|
431
|
69
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1752
|
|
B-3
|
300
|
136
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22
|
558
|
77
|
1955
|
|
B-4
|
250
|
113
|
28
|
711
|
87
|
2209
|
|
|
1 Lift below floor level varies depending on boom position and base configuration. For longer lifts, please contact factory.
2 Performance Characteristics are for standard products. Non-standard products may vary from the original design. Contact Thern, Inc. for this information.
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5BH5 WorkMate Portable Hitch-Mounted Crane Base
- Fast, Toolless Assembly
- Straight or Right-Angle Mounting From Vehicle Hitch
- Compatible with Multiple Thern Cranes
- Rotation Stop Limits Load
- Travel When Desired
- Deployable on Any Terrain
- Compatible with Standard 2-Inch Receiver
- Two-Year Warranty
Base Installation HardwareTorque controlled expansion anchor bolt kits.
- Carbon Steel Anchor Kit
AN50A-5 – Carbon steel anchor body, nut and washer with type 316 stainless steel expansion sleeve. Size: 1/2 inch x 5-1/2 inch.
- 304 Stainless Steel Anchor Kit
AN50A-5S – Type 304 stainless steel anchor body, nut and washer with type 316 stainless steel expansion sleeve. Size: 1/2 inch x 5-1/2 inch.Approx. ship weight: 1.4 lb (0.6 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.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, 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
- 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.
Factory Load TestUpon request, Thern can test your crane prior to shipping, up to 125% of rated load. Contact factory for pricing and availability prior to order.
Extended 5-Year WarrantyExtend our standard 2-year warranty to 5 years. Contact factory for pricing and availability prior to order.
PE Stamp – Professional Engineer StampAvailable upon request at time of order.
CertificationsCE and ATEX certifications available. Contact factory for pricing and availability prior to order.
Explosion Proof ClassificationSpecial configurations for use in explosive settings available. Contact factory for pricing and availability prior to order.
Power Winch OperationAC electric in any voltage. DC electric, hydraulic and pneumatic power winches available.
Custom Electric ControlsThern can build the high quality controls you need to operate your equipment.
Drill-Drivable WinchA worm gear hand winch is also available for operation with a drill motor option.
Limit SwitchAdd an emergency safety shut-off to ensure safe operation.
CustomizationCustomization 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.
Ensign 500 — Model 5PA5-M1 crane with M4022PB-K zinc plated spur gear hand winch and 5BP5 pedestal base.
