8″ Hybrid Hand Cup for Flat Surfaces

Description

Wood’s Powr-Grip N4300 — 8″ Hybrid Hand Cup for Flat Surfaces in Abrasive and Stone Shop Environments (125 lbs / 57 kg)

The Wood’s Powr-Grip N4300 is a professional-grade vacuum hand cup engineered for the safe lifting and handling of flat, smooth, nonporous surfaces in environments where grit, stone dust, and abrasive particles are present. Featuring an 8″ (20 cm) standard rubber suction pad, a metal handle, and an industrial-grade plastic plunger — the hybrid construction that gives this model its name — the N4300 delivers a rated load capacity of 125 lbs (57 kg) on flat surfaces including polished glass, sealed stone, and other smooth nonporous materials. It is the purpose-built choice for stone fabrication shops, granite countertop installers, and glaziers working in dusty or abrasive environments where standard rubber pads are more susceptible to contamination and wear. The N4300 (SKU: 91600, Model: N4300) is manufactured by Wood’s Powr-Grip and is eligible for the WPG Hand Cup Exchange Program.

Compared to the N4000 — which shares the same 8″ G0695 pad and 125 lb capacity — the N4300 is specifically designed for stone shop conditions where airborne grit and abrasive slurry from cutting, grinding, and polishing operations can contaminate and degrade standard suction pads more rapidly. The metal handle (vs. industrial-grade plastic on the N4000) provides additional durability in the demanding physical environment of a stone fabrication shop. The N4300 is the correct selection when the work environment, not just the surface, drives the tool choice.

Key Features & Benefits

Optimized for Abrasive and Stone Shop Environments

The N4300 is specifically rated for use in environments with grit, stone dust, and abrasive particles — conditions common in granite fabrication shops, stone countertop facilities, and tile cutting operations where standard hand cups may experience accelerated pad wear or contamination-related seal failures. Selecting the correct cup for the work environment is as important as selecting the correct cup for the surface, and the N4300 is the WPG-recommended choice for abrasive shop conditions. Always clean the pad contact area before each lift, even in environments where the N4300 is rated for use.

Metal Handle with Industrial-Grade Plastic Plunger (Hybrid Construction)

The N4300’s hybrid construction combines a durable metal handle — providing superior grip rigidity and resistance to physical wear in shop environments — with an industrial-grade plastic plunger that delivers lightweight, rust-resistant vacuum engagement. This combination balances durability where it matters most (the handle, which bears the load and operator grip) with weight savings in the plunger mechanism. The hybrid design is what distinguishes the N4300 from both the all-plastic N4000 and the all-metal N5450.

8″ Standard Rubber Suction Pad (Model G0695)

The 8″ (20 cm) G0695 pad creates a reliable vacuum seal on flat, smooth, nonporous surfaces including polished glass, sealed granite, polished marble, and smooth ceramic tile. The standard rubber compound maintains flexibility and seal integrity across the rated operating temperature range. Replacement G0695 pads are available separately through Wood’s Powr-Grip authorized distributors, and the N4300’s eligibility for the WPG Exchange Program provides an additional serviceability pathway.

125 lb (57 kg) Rated Load Capacity

The N4300 is rated for loads up to 125 lbs (57 kg) on flat, smooth, nonporous surfaces, covering the majority of standard granite countertop sections, glass panels, and stone slabs encountered in fabrication and installation work. For heavier loads, the N5450 (150 lb) or N6450 (175 lb) provide higher capacity ratings. Always confirm the actual panel weight before selecting this tool for a lift.

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 in stone fabrication shops and on installation job sites. Faster cycle times per lift improve productivity when handling multiple slabs or panels in sequence. The release action is controlled and deliberate, preventing accidental disengagement during a lift.

Red-Line Vacuum Loss Indicator

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. In stone shop environments where pad contamination from grit or slurry is a real risk, the vacuum indicator is a critical safety check that should be verified before every lift — not just at initial attachment. Monitor the indicator throughout the lift and lower the load immediately if vacuum loss is detected.

WPG Hand Cup Exchange Program Eligible — Includes Protective Carrying Case

The N4300 is eligible for Wood’s Powr-Grip’s Hand Cup Exchange Program, allowing worn or end-of-life cups to be returned and exchanged to reduce total cost of ownership — particularly valuable in abrasive environments where pad wear rates may be higher than in clean shop conditions. The included protective carrying case keeps the pad clean and protected during storage and transport, helping maintain seal integrity between uses.

Common Applications

Granite Countertop Fabrication and Handling

Stone fabrication shops use the N4300 to lift and position polished granite slabs during templating, CNC cutting, edge profiling, and final inspection. The abrasive environment rating makes it the correct choice over standard hand cups in shops where stone dust and slurry are continuously present in the air and on work surfaces.

Sealed Stone Slab Positioning

For sealed granite, marble, quartzite, and engineered stone surfaces, the N4300 provides reliable vacuum attachment on the polished, nonporous face. It is effective on both raw fabrication slabs and finished countertop sections during installation, provided the surface is smooth, sealed, and free of grit in the pad contact area.

Stone Shop Glass Handling

Glass panels handled within stone shop environments — such as glass backsplashes, glass countertop inserts, or glass shelving fabricated alongside stone products — benefit from the N4300’s abrasive environment rating, which accounts for the grit-laden air conditions present even when the glass surface itself is clean.

Tile and Large-Format Porcelain Handling in Fabrication Environments

Tile fabricators and installers working in environments with cutting dust and abrasive particles use the N4300 to handle polished ceramic and porcelain tile where standard cups may experience faster pad degradation. The N4300 is effective on glazed and polished tile surfaces that are smooth and nonporous.

Polished Stone Panel Installation

Stone installers handling polished marble, travertine (sealed), or engineered stone wall panels use the N4300 to lift and position panels during installation, particularly in environments where the job site has residual stone dust from adjacent cutting or grinding operations.

General Flat Glass Handling in Dusty Environments

Glaziers and glass handlers working on job sites adjacent to construction, demolition, or stone work — where airborne dust and grit are present — use the N4300 as a more environment-appropriate alternative to standard flat-surface hand cups. It handles plate glass, tempered glass, and architectural glass panels on flat surfaces up to 125 lbs.

Compatible Materials

• Polished granite (sealed surface)
• Polished marble and travertine (sealed surface)
• Quartzite and natural stone (polished, sealed, flat)
• Engineered stone and quartz composite (polished face)
• Plate glass and float glass (flat)
• Tempered and laminated safety glass (flat)
• Glazed and polished ceramic tile (flat)
• Polished porcelain tile (flat)
• Smooth painted or coated metal panels (flat)
• Any smooth, nonporous flat surface in abrasive or stone shop environments

Not compatible with: rough, textured, or porous surfaces; curved surfaces; unsealed or unpolished stone where the surface is not smooth and nonporous; surfaces contaminated with grit in the pad contact area (clean before use); concrete, brick, wood, or drywall.

Product Documents

• N4300 Instructions (PDF)
• N4300 Specifications (PDF)

Application Instructions

Step 1: Surface and Environment Assessment

1. Confirm the surface is smooth, flat, and nonporous — do not proceed on rough, textured, porous, or curved surfaces.
2. Even in abrasive environments, clean the specific pad contact area on the work surface before attaching — remove grit, slurry, dust, and moisture from the contact zone.
3. Verify the panel weight does not exceed 125 lbs (57 kg).

Step 2: Pad Inspection and Preparation

1. Inspect the G0695 suction pad for cuts, cracks, embedded grit, hardening, or contamination. Replace if damaged or if grit is embedded in the rubber surface.
2. Wipe the pad face clean before each lift — in stone shop environments, pad contamination between lifts is common and must be addressed.
3. Ensure the pad is at operating temperature (above 10°F / -12°C) before use.

Step 3: Attaching the Cup

1. Position the pad flat against the cleaned surface area, ensuring full pad perimeter contact.
2. Engage the vacuum mechanism using the handle until firm resistance is felt.
3. Check the red-line vacuum indicator — confirm it shows a stable, 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 — grit contamination can cause gradual vacuum loss even after initial attachment is confirmed.
3. Do not exceed the 125 lb (57 kg) rated load capacity.
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 thoroughly after use and store in the supplied protective carrying case.

Technical Specifications

Specification	Details
Model	N4300
SKU	91600
Vendor	Wood’s Powr-Grip
Load Capacity	125 lbs [57 kg]
Pad Diameter	8″ [20 cm]
Pad Model	G0695
Rubber Type	Standard
Handle Type	Metal
Plunger Type	Industrial-Grade Plastic
Surface Texture Required	Smooth
Material Porosity Required	Nonporous
Allowable Surface Curvature	Flat only
Ideal Uses	Glass and smooth, nonporous flat surfaces in abrasive/stone shop environments
Other Uses	Sealed, polished stone in stone shop environments
Maximum Elevation	5,000 ft [1,500 m]
Operating Temperature Range	10°F to 120°F [-12°C to 49°C]
WPG Exchange Program	Eligible
Includes	Protective carrying case
Vacuum Loss Indicator	Yes (red-line)

Safety Data Summary

Hazard Information

• Grit or abrasive contamination of the suction pad can cause gradual or sudden vacuum loss during a lift — clean the pad contact area and inspect the pad before every lift
• Vacuum loss during a lift can result in sudden load drop, causing serious injury or property damage
• Overloading beyond 125 lbs (57 kg) rated capacity may cause sudden cup release without warning
• Use on curved, rough, textured, or porous surfaces will prevent a full pad seal and significantly increases drop risk
• Damaged, worn, or grit-embedded suction pads must be replaced before use
• Operating outside the rated temperature range (10°F–120°F) may degrade rubber pad performance
• Do not use above 5,000 ft (1,500 m) elevation

Personal Protective Equipment

• Safety glasses or face shield — mandatory in stone shop environments with airborne particles
• Cut-resistant gloves rated for stone and glass handling
• Steel-toed safety footwear
• Dust mask or respirator appropriate for stone dust (silica) exposure in fabrication environments
• Hard hat when working in overhead or multi-level environments

Safe Handling

• Clean the pad contact area on the work surface before every lift — do not rely on the abrasive environment rating as a substitute for surface preparation
• Inspect and wipe the pad face before each lift in stone shop conditions
• Never exceed the rated 125 lb load capacity
• Monitor the red-line indicator continuously — lower the load immediately if vacuum loss is detected
• Replace pads that show embedded grit, cuts, hardening, or surface degradation
• Store in the supplied carrying case to protect the pad from contamination between uses

Frequently Asked Questions

Q: What makes the N4300 different from the N4000?
A: Both share the same 8″ G0695 pad and 125 lb flat-surface capacity, but the N4300 is specifically designed for abrasive and stone shop environments where grit, stone dust, and slurry are present. The N4300 also has a metal handle (vs. industrial-grade plastic on the N4000) and is eligible for the WPG Exchange Program. Choose the N4300 when the work environment — not just the surface — involves abrasive conditions.

Q: Does the abrasive environment rating mean I don’t need to clean the surface before lifting?
A: No. The abrasive environment rating means the N4300 is designed to perform reliably in environments where grit is present in the air and on surrounding surfaces — but you must still clean the specific pad contact area on the work surface before each lift. Grit between the pad and the surface will prevent a full vacuum seal regardless of which cup you use.

Q: Can the N4300 be used on unsealed or unpolished stone?
A: No. The N4300 requires a smooth, nonporous surface for a reliable vacuum seal. Unsealed or unpolished stone is typically porous and/or rough, which will prevent the pad from forming a full seal. Use only on polished, sealed stone surfaces where the contact area is smooth and nonporous.

Q: Is the N4300 eligible for the WPG Hand Cup Exchange Program?
A: Yes. The N4300 (SKU 91600) is eligible for the Wood’s Powr-Grip Hand Cup Exchange Program. Contact your WPG authorized distributor for current program terms and exchange conditions.

Q: What replacement pad does the N4300 use?
A: The N4300 uses the G0695 standard rubber pad (8″ diameter) — the same pad model used on the N4000. 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, environment conditions, and load requirements before placing your order.

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