4-½” Handi-Grip Hand Cup for Flat or Curved Surfaces – Pack of 4

Description

Wood’s Powr-Grip LJ45HG — 4½” Aluminum Handle Handi-Grip Vacuum Hand Cup for Flat and Curved Surfaces (40 lbs / 18 kg) — Pack of 4

The Wood’s Powr-Grip LJ45HG Handi-Grip is the most compact vacuum hand cup in the standard Wood’s Powr-Grip hand cup lineup, engineered for fast, reliable lifting and positioning of a wide variety of flat and curved smooth, nonporous surfaces weighing up to 40 lbs (18 kg). Featuring a 4½” (11 cm) standard rubber suction pad (Model LJ45), an aluminum handle, and an industrial-grade plastic plunger, the LJ45HG is purpose-built for applications where a smaller pad footprint is required — including tight installation spaces, narrow surface areas, small glass panels, and curved surfaces where a larger pad would overhang the material edge or fail to fit within the available contact zone. Rated for curved surfaces with a minimum radius of 12″ (305 mm) and operable down to 0°F (-18°C), the LJ45HG performs across a wide range of environments and applications. Sold as a Pack of 4 (SKU: 91220, Model: LJ45HG), the kit provides redundant tooling for multi-cup lifts and high-volume operations. Manufactured by Wood’s Powr-Grip.

The LJ45HG is the smallest-pad option in the WPG hand cup range, sitting below the 6″ TL6HG (70 lb, same 12″ radius, 0°F rating) and the 6″ TL6RH (70 lb, offset handle). Where the 6″ cups are the standard everyday carry choice for most field applications, the LJ45HG is the correct selection when the 4½” pad diameter is specifically required — either because the available surface area is too small for a 6″ pad, because the installation space is too confined for a larger cup body, or because the lighter 40 lb load rating is sufficient and the smaller form factor is preferred for maneuverability. The aluminum handle provides lightweight, corrosion-resistant performance, and the 0°F cold rating extends usability into cold storage and outdoor winter environments.

Key Features & Benefits

4½” Pad — Most Compact Form Factor in the WPG Hand Cup Lineup

The 4½” (11 cm) LJ45 pad is the smallest standard pad diameter in the Wood’s Powr-Grip hand cup range, making the LJ45HG the correct choice when the available surface contact area is too small for a 6″ or larger pad, or when the cup body must fit within a confined installation space. Applications include small glass panels, narrow tile sections, tight glazing frames, and curved surfaces where a larger pad would overhang the material edge and prevent a full seal. The compact form factor also makes the LJ45HG the most portable cup in the lineup for toolbox and pocket carry.

Flat and Curved Surface Compatibility (Min. 12″ Radius)

The LJ45HG is rated for both flat and curved smooth, nonporous surfaces with a minimum curved surface radius of 12″ (305 mm), matching the TL6HG, TL6RH, and LJ6VH. The smaller 4½” pad diameter can achieve a full seal on curved surfaces where a larger pad would bridge across the curvature and fail to seat fully, making the LJ45HG particularly effective on tightly curved surfaces at or near the 12″ minimum radius where larger pads struggle. Always confirm the surface radius before use on curved applications.

Aluminum Handle — Lightweight and Corrosion-Resistant

The aluminum handle provides a lightweight, corrosion-resistant grip suited for repeated use across shop and field environments, including wet, humid, and cold conditions. Aluminum construction resists rust in environments where moisture, outdoor exposure, or salt air are factors, while maintaining the structural rigidity needed for controlled lifting of loads up to 40 lbs. The lightweight handle and compact cup body make the LJ45HG the easiest cup in the WPG lineup to carry and maneuver in confined spaces.

Extended Low-Temperature Rating (0°F / -18°C)

The LJ45HG is rated for operation down to 0°F (-18°C), making it suitable for cold storage facilities, outdoor winter job sites, and refrigerated environments where standard-rated cups (10°F minimum) may experience rubber hardening and reduced seal performance. For field technicians working year-round in northern climates or cold chain environments, this extended cold-temperature rating ensures the LJ45HG remains operational in all seasons.

Fast Attach and Release Mechanism

The quick-engage vacuum mechanism allows operators to attach and release the cup rapidly without tools, supporting high-throughput workflows across the wide variety of flat and curved applications the LJ45HG is designed for. The compact form factor enables faster repositioning between attachment points on small panels or in confined spaces where larger cups would be difficult to maneuver.

Red-Line Vacuum Loss Indicator — Vacuum Pad Protector Included — Pack of 4

The built-in red-line indicator provides a continuous visual warning if vacuum pressure drops significantly during a lift, giving the operator an immediate alert before load failure can occur. Each LJ45HG ships with a vacuum pad protector to keep the suction pad clean and protected during storage and transport. The pack-of-4 configuration provides redundant tooling for multi-cup lifts and ensures replacement cups are on hand when a pad requires service.

Common Applications

Small Glass Panel and Glass Insert Handling

Glaziers and glass installers use the LJ45HG to handle small glass panels, glass inserts, sidelite glass, and other small-format glass pieces where the available surface area is too small for a 6″ pad to achieve a full seal within the glass boundary. The 4½” pad fits within the contact area of small glass units that would be incompatible with larger cups.

Narrow Tile and Stone Tile Handling

Tile setters handling narrow tile sections, mosaic tile sheets, small-format stone tile, and trim pieces use the LJ45HG where the tile surface area is insufficient for a larger pad. The compact cup body also allows precise placement on individual tiles during installation without disturbing adjacent tiles.

Confined Space and Tight Frame Installation

Installers working in confined spaces — such as tight glazing frames, narrow window openings, cabinet glass installations, and furniture glass inserts — use the LJ45HG where the cup body must fit within a restricted clearance that would prevent a larger cup from being positioned correctly. The compact form factor is the primary advantage in these applications.

Curved Surface Handling at or Near 12″ Minimum Radius

On tightly curved surfaces at or near the 12″ minimum radius, the LJ45HG’s smaller pad diameter can achieve a full seal where a 6″ or larger pad would bridge across the curvature and fail to seat. This makes the LJ45HG effective on curved glass, curved tile, and curved architectural elements with tighter radii where larger cups are marginal.

Automotive Glass and Small Panel Handling

Auto glass technicians use the LJ45HG for handling small automotive glass pieces — quarter glass, vent glass, small side windows, and other compact curved glass units — where the 4½” pad fits within the available glass surface area and the 12″ minimum radius accommodates the glass curvature.

Multi-Cup Coordinated Lifts on Larger Panels

The pack-of-4 configuration supports multi-cup coordinated lifts for panels exceeding the 40 lb single-cup rating. Multiple LJ45HG cups can be positioned along a panel to distribute load, with each cup providing an independent vacuum attachment point. This approach is particularly useful when the panel surface area or installation clearance prevents the use of larger cups.

Compatible Materials

• Small flat glass panels and glass inserts
• Curved automotive glass (quarter glass, vent glass, small side windows) — min. 12″ radius
• Narrow tile sections and small-format stone tile
• Glazed ceramic and polished porcelain tile (small format)
• Curved architectural glass and elements — min. 12″ radius
• Smooth painted or coated metal panels (flat and curved, within radius rating)
• Acrylic sheet and polycarbonate panels (small format)
• Any smooth, nonporous flat or curved surface where the 4½” pad fits within the available contact area and radius ≥ 12″ (305 mm)

Not compatible with: rough, textured, or porous surfaces; surfaces with radius tighter than 12″ (305 mm); surfaces where the 4½” pad cannot achieve full perimeter contact within the available surface area; loads exceeding 40 lbs per cup; concrete, brick, unpolished stone, wood, or drywall.

Product Documents

• LJ45HG Instructions (PDF)
• LJ45HG Troubleshooting Guide (PDF)

Application Instructions

Step 1: Surface and Material Assessment

1. Confirm the surface is smooth and nonporous — do not proceed on rough, textured, or porous surfaces.
2. Confirm the available surface area accommodates the full 4½” pad diameter with the pad centered on the contact zone.
3. For curved surfaces, confirm the radius is 12″ (305 mm) or greater.
4. Verify the panel or object weight does not exceed 40 lbs (18 kg) per cup, or plan a multi-cup lift for heavier panels.

Step 2: Pad Inspection and Preparation

1. Inspect the LJ45 suction pad for cuts, cracks, hardening, or contamination. Replace if damaged.
2. Clean the pad contact area on the work surface — remove dust, oil, moisture, and debris.
3. In cold environments, verify pad flexibility above 0°F (-18°C) before use.

Step 3: Attaching the Cup

1. Position the 4½” pad flat against the surface with full perimeter contact within the available surface area.
2. Engage the vacuum mechanism using the aluminum handle/plunger until firm resistance is felt.
3. Check the red-line vacuum indicator — confirm full vacuum before lifting.
4. Apply a controlled test load (firm downward pull) to verify seal integrity before committing to the full lift.

Step 4: Lifting, Positioning, and Release

1. Lift smoothly — avoid sudden jerking motions that can break the vacuum seal.
2. Monitor the red-line indicator continuously throughout the lift and during positioning.
3. For multi-cup lifts, coordinate with all operators to lift and lower simultaneously.
4. Do not exceed the 40 lb (18 kg) rated load capacity per cup.
5. Lower the load fully to a stable surface before releasing the vacuum.
6. Engage the release mechanism slowly and in a controlled manner.
7. Clean the pad after use and store with the vacuum pad protector.

Technical Specifications

Specification	Details
Model	LJ45HG
SKU	91220
Vendor	Wood’s Powr-Grip
Pack Quantity	4 units
Load Capacity	40 lbs [18 kg]
Pad Diameter	4½” [11 cm]
Pad Model	LJ45
Rubber Type	Standard
Handle Type	Aluminum
Plunger Type	Industrial-Grade Plastic
Surface Texture Required	Smooth
Material Porosity Required	Nonporous
Allowable Surface Curvature	Flat or Curved
Minimum Radius for Curved Loads	12″ [305 mm]
Maximum Elevation	5,000 ft [1,500 m]
Operating Temperature Range	0°F to 120°F [-18°C to 49°C]
Vacuum Loss Indicator	Yes (red-line)
Includes	Vacuum pad protector

Safety Data Summary

Hazard Information

• Vacuum loss during a lift can result in sudden load drop, causing serious injury or property damage
• Overloading beyond 40 lbs (18 kg) per cup may cause sudden cup release without warning
• Use on surfaces with radius tighter than 12″ (305 mm) will prevent full pad seal and significantly increases drop risk
• Use on surfaces where the 4½” pad cannot achieve full perimeter contact will reduce holding capacity
• Damaged or contaminated suction pads must be replaced before use
• In cold environments, verify pad flexibility and seal integrity before each lift — rubber performance approaches its limit at 0°F (-18°C)
• Do not use above 5,000 ft (1,500 m) elevation

Personal Protective Equipment

• Safety glasses or face shield when handling glass or tile panels
• Cut-resistant gloves rated for glass and tile handling
• Steel-toed safety footwear
• Insulated gloves and appropriate cold-weather PPE when operating at or near 0°F (-18°C)

Safe Handling

• Confirm the full 4½” pad perimeter fits within the available surface contact area before attaching
• Inspect the pad and clean the contact area before each lift
• Never exceed the rated 40 lb load capacity per cup
• Monitor the red-line indicator continuously — lower the load immediately if vacuum loss is detected
• For multi-cup lifts, coordinate all operators before lifting and lower simultaneously
• In cold environments, verify pad seal integrity with a test load before every lift
• Store with the vacuum pad protector to maintain pad condition between uses

Frequently Asked Questions

Q: Why would I choose the LJ45HG over the TL6HG?
A: The LJ45HG is the correct choice when the available surface area is too small for the TL6HG’s 6″ pad, when the installation space is too confined for a larger cup body, or when the 40 lb load rating is sufficient and the smaller form factor is preferred for maneuverability. The TL6HG (70 lb, 6″ pad) is the better choice for larger panels and general-purpose use where the surface area accommodates a 6″ pad. Choose the LJ45HG specifically for small panels, tight spaces, and applications where pad size is the limiting factor.

Q: Can the LJ45HG handle tighter curves than larger cups?
A: The minimum radius rating is the same (12″ / 305 mm) as the TL6HG, TL6RH, and LJ6VH. However, the smaller 4½” pad diameter can achieve a full seal on curved surfaces where a 6″ or larger pad would bridge across the curvature and fail to seat fully — making the LJ45HG more practical on surfaces at or near the 12″ minimum radius where larger pads are marginal.

Q: Can I use multiple LJ45HG cups to lift a panel heavier than 40 lbs?
A: Yes. Use one cup per 40 lbs of panel weight, distributed across the panel surface. The pack-of-4 configuration supports coordinated lifts up to 160 lbs when all four cups are used simultaneously with proper load distribution and operator coordination. Ensure all cups achieve a full vacuum seal before lifting and coordinate all operators to lift and lower simultaneously.

Q: Can the LJ45HG be used in cold environments?
A: Yes. The LJ45HG is rated down to 0°F (-18°C), making it suitable for cold storage facilities, outdoor winter job sites, and refrigerated environments. Always verify pad flexibility and seal integrity with a test load before lifting in cold conditions.

Q: What replacement pad does the LJ45HG use?
A: The LJ45HG uses the LJ45 standard rubber pad (4½” diameter). Replacement pads are available separately through Wood’s Powr-Grip authorized distributors.

Q: Is this product made to order?
A: Yes. This product is made to order and all sales are final. Please confirm your surface type, available contact area, curved surface radius, and load requirements before placing your order.

California Residents: ⚠️ WARNING: Cancer and/or Reproductive Harm — www.p65Warnings.ca.gov