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UNICLAMPS™
Lightweights - Middleweights - Heavyweights
Uniclamp™ Welding Hold Down Clamp See below for all models to suit your needs.
WHAT IT DOES:
uniclamps
UNICLAMP™ ELIMINATES THE GAP BETWEEN THE PLATE AND THE STIFFENER!
heavy duty lifting vacuum
This conventional setup can take up to two hours to
complete, The process including welding lugs, dogs
and bridges in place - positioning awkward and heavy
equipment - then removing these setups and cleaning
up the attachment points.
The UNICLAMP™ takes less than 30 seconds to
set up - increasing productivity, safety and quality.
HOW IT WORKS:
The simple connection of a standard plant-supplied compressed air line and the flick of a switch allows the clamp’s
built-in, high speed generator to create a powerful vacuum, permitting the vacuum pads to immediately attach them-
selves directly to the work surface. The clamp manual screw or hydraulic ram can then be operated to instantly secure
the proper alignment of parts. UNICLAMPS™ will meet your clamping requirements without the tedious, time
consuming and sometimes dangerous paraphernalia associated with traditional methods of fabrication assembly
techniques. NO MORE LUGS DOGS, BRIDGES, WEDGES, CHAINS, JACKS, C-CLAMPS, TACK WELDS,
OR REGRINDING REQUIRED!
UNICLAMPS™ Are Powered by Compressed Air and Leave No Marks!
NOTE: UNICLAMPS™ ARE NOT DESIGNED FOR LIFTING PURPOSES.
UNIVAC® Vacuum Lifters are designed for efficient, one-person operation in lifts of semi-porous and non-porous
material. Unlike magnets or edge grabs, vacuum units will not mark or scratch material surfaces or edges. Additionally,
vacuum lifters can easily lift nonferrous metals and thin sheets (under 1/4").
Benefits your company will receive with UNIVAC® Vacuum Lifters:
• Increase productivity, reducing cost.
• One person operation.
• Eliminate material damage.
• Precision handling made easier.
• Versatile handling of most materials.
• Improve storage space.
• Provide a low maintenance lifter.
• Durable for long lasting service.
ALL UNIVAC® Lifters Have:
• Registered nameplates as required by ASME.
• Rated capacities and product safety labels.
UNIVAC® Vacuum Lifters adhere to the highest quality standards in the industry and all units conform to ASME
standards
. All UNIVAC® Vacuum Lifters are designed with a 2 to 1 vacuum safety factor.
Delivery Program
Look for the red QUICKSHIP logo on our standard products. The specific QUICKSHIP model number is shown
in red. QUICKSHIP products ship in 7 to 10 days (excluding weekends and holidays).
Industry Standard
The American Society of Mechanical Engineers (ASME) has developed standards that apply specifically to these
types of devices. ASME B30.20 provides detailed information on the classifications, marking, construction, installation,
inspection, testing maintenance and operation of below the hook lifting devices. ASME BTH-1 provides detailed
information on the design criteria of below the hook lifting devices. These standards serve as a guide to government
authorities, manufactures, purchasers and users of lifting devices. For a summary of these standards, please click
on this link.
THE LIGHTWEIGHTS...
WHD-1 and WHD-2 models are constructed of a high-strength aluminum bringing lightweight portability to workpiece
positioning and clamping.
The UNICLAMPS™ have proved to be invaluable in transportation industry applications. These easy to position
clamps are ideally suited for sheet and light plate fabrication. Lightweight UNICLAMPS™ are used to secure “skin”
materials to ribbed structures at aircraft, aerospace, bus, trailer, and truck manufacturing facilities.
vacuum lifter
lightweight vacuum lifter
The WHD-1 and WHD-2 UNICLAMPS™ feature capacities
up to 1,200 lbs with clamp weights not exceeding 16 lbs!
Features include round or rectangular vacuum pads, varying
headframe widths, and varying height under the ram to suit
special requirements.
SPECIFICATIONS
Model
No.
Holding
Force
(lbs.)
D
Height Under
Ram (in.)
Dimensions (in.) Weight
(lbs.)
Round
Vacuum Pads
Rectangular
Vacuum Pads
A B C A B C
WHD-1 750 8-3/4 8-1/4 15-1/2 22-3/4 12 15-1/2 19 14
WHD-2 1200 8-3/4 5-7/8 15-1/2 25-1/8 12 15-1/2 19 16
NOTE: Weights and dimensions are approximate.
*Call sales department for a quote to your specifications.
UNICLAMPS™ Disassemble in Seconds Without Tools!
NOTE: UNICLAMPS™ ARE NOT DESIGNED FOR LIFTING PURPOSES.
THE MIDDLEWEIGHTS...
Like their smaller counterparts, the UNICLAMP™ models
WHD-18, WHD-24, WHD-32 and WHD-40 are
constructed of high-strength aluminum affording these clamps
the identical advantage of reduced weight for heavier
duty positioning and clamping requirements.
middleweight vacuum lifter
The clamp models are used extensively in aircraft, ship
building, bridge construction, tank manufacturing and the
steel fabrication industry. They excel whenever larger
assemblies need to be drawn into alignment or held in
position for a welding process.
welding hold down clamps
The WHD-18 and WHD-24 UNICLAMP™
features include round or rectangular vacuum pads,
varying headframe widths, and varying height under
the ram to suit special requirements.
welding vacuum lifter
The WHD-32 and WHD-40 are available with
round, rectangular or square vacuum pads,
varying headframe widths, and varying height
under the ram to suit special requirements.
SPECIFICATIONS
Model
No.
Holding
Force
(lbs.)
D
Height Under
Ram (in.)
Dimensions (in.)
Weight
(lbs.)
Round Vacuum Pads
Rectangular Vacuum Pads
A
B
C
A
B
C
WHD-18 1800 15-3/4 13-3/4 24 34-1/4 20 24 28 34
WHD-24 2400 15-3/4 12 24 36 19 24 29 36
WHD-32 3200 15-3/4 10 24 38 15 24 33 38
WHD-40 4000 15-3/4 8 24 40 15 24 33 42
NOTE: Weights and dimensions are approximate.
*Call sales department for a quote to your specifications.
Concave or Convex Surfaces, No Problem for UNICLAMPS™!
NOTE: UNICLAMPS™ ARE NOT DESIGNED FOR LIFTING PURPOSES.
THE HEAVYWEIGHTS...
UNICLAMP™ steel constructed models WHD-60, WHD-80 and WHD-100 answer industry’s heaviest application
requirements.
Used in ship building, heavy plate fabrication, plant construction, bridge building, large tank fabrication, these clamps
bring incredible amounts of clamping power to bear on the largest of fabrication application requirements. These
easy-to-use, portable, high-speed clamps draw oversize materials into position for welding, assembly or alignment
procedures.
heavyweight vacuum lifter vacuum lifter
The WHD-60, WHD-80, and WHD-100 Welding and Fabrication Clamps, boast holding force up to 10,000 lbs with a venturi vacuum generator and a hydraulic powered ram as standard features. Vacuum pads in round, rectangular, or square are available to suit custom requirements.
SPECIFICATIONS
Model
No.
Holding
Force
(lbs.)
D
Height Under
Ram (in.)
Dimensions (in.) Weight
(lbs.)
Round Vacuum Pads Rectangular Vacuum Pads
A B C A B C
WHD-60 6000 24 19 31 50 17 26 35 165
WHD-80 8000 24 14 37 60 15 29 43 195
WHD-100 10000 30 12-1/2 40 67-1/2 17 38 59 245
NOTE: Weights and dimensions are approximate.
*Call sales department for a quote to your specifications.
UNICLAMP™ APPLICATIONS
Whether work surfaces are angled, inclined, right angles, convex or concave, UNICLAMPS™ provide the best
solution for your positioning and clamping needs.
uniclamp applications
Uniclamps, Lightweight Uniclamp, Middleweight Uniclamp, Heavyweight Uniclamps, Welding Hold Down Clamp,
Welding Clamp, Securing Clamp, Aligning Clamp, Portable Clamp, High Speed Clamps, and Assembly Clamps from
your source for material handling equipment.

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