3" X 6" Handi-Grip Hand Cup for Flat to Slightly Curved Surfaces (40 LBS / 18 KG) - Pack of 4

Wood's Powr-Grip RF36HG — 3" x 6" Handi-Grip Rectangular Hand Cup for Long, Narrow Flat and Slightly Curved Surfaces (40 lbs / 18 kg) — Pack of 4

The Wood's Powr-Grip RF36HG Handi-Grip is a compact, rectangular vacuum hand cup engineered for the safe lifting and handling of small to medium-sized loads on flat and slightly curved, smooth, nonporous surfaces. Featuring a 3" x 6" (8 cm x 15 cm) rectangular standard rubber pad, an aluminum handle, and an industrial-grade plastic plunger, the RF36HG is purpose-built for applications involving long, narrow objects — such as glass strips, sheet metal panels, plastic extrusions, and narrow architectural elements — where a round pad would not achieve adequate surface contact or would overhang the material edge. Rated for loads up to 40 lbs (18 kg) and operable down to 0°F (-18°C), the RF36HG extends usable range into cold storage and outdoor winter environments where standard-rated cups may not perform. Sold as a Pack of 4 (SKU: 91270, Model: RF36HG), this kit supports multi-cup lifts and provides redundant tooling for high-volume handling operations. The RF36HG is manufactured by Wood's Powr-Grip.

The rectangular pad geometry is the defining characteristic that sets the RF36HG apart from all round-pad hand cups in the Wood's Powr-Grip lineup. Where a round 6" or 8" pad would extend beyond the edge of a narrow glass strip, sheet metal blank, or plastic panel — preventing a full seal — the 3" x 6" rectangular pad aligns with the long axis of the material, maximizing contact area within the available surface width. The aluminum handle provides a lightweight yet rigid grip, and the slightly curved surface rating adds versatility for materials with gentle convex or concave profiles that would not accommodate flat-surface-only cups.

Key Features & Benefits

Rectangular 3" x 6" Pad — Optimized for Long, Narrow Objects

The RF36 rectangular pad (3" x 6" / 8 cm x 15 cm) is specifically designed for lifting long, narrow materials where a round pad cannot achieve a full seal within the available surface width. Glass strips, narrow sheet metal blanks, plastic extrusions, door glass edges, and narrow architectural panels are all applications where the rectangular geometry provides reliable vacuum contact that a round pad cannot. This is the primary reason to select the RF36HG over any round-pad hand cup in the WPG lineup.

Flat and Slightly Curved Surface Compatibility

The RF36HG is rated for both flat and slightly curved smooth, nonporous surfaces, providing versatility for materials with gentle convex or concave profiles — such as slightly curved sheet metal, gently curved plastic panels, or mildly curved glass — that would not accommodate flat-surface-only cups. The slightly curved rating is less defined than the specific minimum radius ratings on the N6450 or LJ6VH; consult the WPG specifications sheet and test on the specific surface before committing to a production lift.

Aluminum Handle

The aluminum handle provides a lightweight, corrosion-resistant grip that is well-suited for repeated use in both shop and field environments. Aluminum construction resists rust in wet or humid conditions — relevant for applications involving wet glass, outdoor glazing, or cold storage environments — while maintaining the structural rigidity needed for controlled lifting of loads up to 40 lbs. The lightweight handle reduces operator fatigue during high-repetition handling tasks.

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

The RF36HG is rated for operation down to 0°F (-18°C) — 10 degrees colder than the standard 10°F minimum on most WPG hand cups — making it suitable for cold storage facilities, refrigerated environments, and outdoor winter job sites where other cups may experience rubber hardening and reduced seal performance. This extended cold-temperature rating is a meaningful differentiator for operators working in freezer warehouses, cold chain logistics, or northern climate construction sites.

40 lb (18 kg) Rated Load Capacity

The RF36HG is rated for loads up to 40 lbs (18 kg), appropriate for the small to medium-sized panels, strips, and sheets it is designed to handle. For heavier loads or larger surface areas, round-pad cups with higher capacity ratings (N4000, N5450, N6450) are the correct selection. The pack-of-4 configuration allows multiple cups to be used simultaneously on a single panel to distribute load across multiple vacuum points when needed.

Pack of 4 — Multi-Cup Lift Ready

The pack-of-4 configuration provides the redundant tooling needed for multi-cup coordinated lifts on longer panels or heavier loads that exceed a single cup’s 40 lb rating. It also ensures replacement cups are on hand when a pad requires service, minimizing downtime in production environments. The compact form factor of the RF36HG makes the pack easy to store in tool bags, service vehicles, and shop drawers.

Common Applications

Narrow Glass Strip and Glass Edge Handling

Glass fabricators and glaziers use the RF36HG to handle narrow glass strips, glass edge pieces, and cut glass sections where the material width is too narrow for a round pad to achieve a full seal. The rectangular pad aligns with the long axis of the strip, providing maximum contact area within the available surface width.

Sheet Metal Panel and Blank Handling

HVAC fabricators, sheet metal workers, and metal panel installers use the RF36HG to lift and position narrow sheet metal blanks, duct sections, and formed metal panels where a compact, rectangular grip point is needed. The aluminum handle resists corrosion in environments where metal shavings, cutting fluid, or moisture are present.

Plastic Panel and Extrusion Handling

Fabricators working with acrylic sheet, polycarbonate panels, PVC extrusions, and other smooth plastic materials use the RF36HG to handle narrow or long plastic pieces during cutting, routing, and assembly operations. The rectangular pad provides reliable vacuum contact on smooth plastic surfaces that round pads may overhang.

Cold Storage and Refrigerated Environment Handling

The 0°F (-18°C) low-temperature rating makes the RF36HG suitable for handling glass panels, plastic sheets, and metal components in cold storage facilities, walk-in freezers, and refrigerated warehouses where standard-rated cups may not maintain adequate rubber flexibility and seal performance.

Narrow Architectural Glass and Panel Installation

Glaziers and installers working with narrow sidelite glass, transom panels, glass fins, and other long, narrow architectural glass elements use the RF36HG to achieve a secure vacuum grip on surfaces where larger round pads cannot fit within the available glass width.

Multi-Cup Coordinated Lifts on Long Panels

For long, narrow panels that exceed the 40 lb single-cup rating, two or more RF36HG cups from the pack-of-4 kit can be used in a coordinated lift, with cups positioned along the length of the panel to distribute load and maintain balance. This approach is common in glass strip handling, long sheet metal panel installation, and plastic extrusion positioning.

Compatible Materials

• Narrow glass strips and cut glass sections
• Plate glass and float glass (flat and slightly curved)
• Tempered and laminated safety glass — smooth face
• Sheet metal blanks and formed metal panels (smooth, nonporous face)
• Acrylic sheet and polycarbonate panels
• PVC and other smooth plastic extrusions and panels
• Smooth painted or coated metal panels
• Smooth ceramic and porcelain tile (narrow format)
• Any smooth, nonporous flat or slightly curved surface where the 3" x 6" pad fits within the available contact area

Not compatible with: rough, textured, or porous surfaces; tightly curved surfaces beyond the slightly curved rating; surfaces narrower than the pad width (3"); materials where the pad cannot achieve full perimeter contact; concrete, brick, unpolished stone, wood, or drywall.

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 width accommodates the full 3" pad width with the pad oriented along the long axis of the material.
3. For slightly curved surfaces, test the pad seal on the specific surface before committing to a production lift — no specific minimum radius is published for this model.
4. Verify the panel 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 RF36 rectangular 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, allow the pad to acclimate slightly above 0°F (-18°C) before use if stored in extreme cold.

Step 3: Attaching the Cup

1. Orient the rectangular pad along the long axis of the material to maximize contact area.
2. Position the pad flat against the surface, ensuring full pad perimeter contact across the 3" x 6" footprint.
3. Engage the vacuum mechanism using the aluminum handle/plunger until firm resistance is felt.
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. For multi-cup lifts, coordinate with the second operator to lift and lower simultaneously.
3. Do not exceed the 40 lb (18 kg) rated load capacity per cup.
4. Lower the load fully to a stable surface before releasing the vacuum.
5. Engage the release mechanism slowly and in a controlled manner.
6. Clean the pad after use and store in a clean, protected location.

Technical Specifications

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 too narrow for full 3" pad width contact will prevent a complete seal and increases drop risk
• Use on tightly curved surfaces beyond the slightly curved rating 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 sheet metal
• Cut-resistant gloves rated for glass and sheet metal handling
• Steel-toed safety footwear
• Insulated gloves and appropriate cold-weather PPE when operating at or near 0°F (-18°C)

Safe Handling

• Orient the rectangular pad along the long axis of the material to maximize contact area and seal reliability
• Inspect the pad before each lift and clean the contact area on the work surface
• Never exceed the rated 40 lb load capacity per cup — use multiple cups for heavier panels
• Apply a test load before committing to the full lift, especially on slightly curved surfaces
• In cold environments, verify pad seal integrity with a test load before every lift
• Store in a clean, protected location to maintain pad condition between uses

Frequently Asked Questions

Q: Why would I choose the RF36HG over a round-pad hand cup?
A: The RF36HG is the correct choice when the material you’re handling is too narrow for a round pad to achieve a full seal within the available surface width — such as glass strips, narrow sheet metal blanks, plastic extrusions, or long narrow panels. The 3" x 6" rectangular pad aligns with the long axis of the material, maximizing contact area where a round pad would overhang the edge and fail to seal.

Q: What does “slightly curved” mean for this cup?
A: Unlike the N6450 (min. 13" radius) or LJ6VH (min. 12" radius), the RF36HG does not publish a specific minimum radius for its slightly curved rating. It is designed for materials with gentle convex or concave profiles — such as mildly curved sheet metal or gently curved plastic panels — rather than tightly curved surfaces like automotive windshields. Always test the pad seal on the specific surface before committing to a production lift.

Q: Can the RF36HG be used in a freezer or cold storage environment?
A: Yes. The RF36HG is rated down to 0°F (-18°C), which is 10 degrees colder than the standard 10°F minimum on most WPG hand cups. This makes it suitable for cold storage facilities, walk-in freezers, and outdoor winter applications. Always verify pad flexibility and seal integrity with a test load before lifting in cold conditions, as rubber performance approaches its rated limit at 0°F.

Q: How many cups do I need for a panel heavier than 40 lbs?
A: Use one cup per 40 lbs of panel weight, distributed along the length of the panel. For example, a 80 lb panel would require a minimum of two cups in a coordinated two-operator lift. The pack-of-4 configuration supports lifts up to 160 lbs when all four cups are used simultaneously with proper load distribution and operator coordination.

Q: What replacement pad does the RF36HG use?
A: The RF36HG uses the RF36 standard rubber rectangular pad (3" x 6"). 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, material dimensions, and load requirements before placing your order.

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