LSR Overmolded Metal Handle Grip Sleeve

LSR Overmolded Metal Handle Grip Sleeve is a custom-molded component that combines a structural metal core with a durable liquid silicone rubber (LSR) outer coating, designed to improve grip comfort, vibration dampening, and corrosion protection for handheld tools, equipment handles, and industrial fixtures.

At 橡楚（湖北）橡胶有限公司, located at 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, we produce these overmolded sleeves using food-contact and industrial-grade virgin LSR materials, paired with precision overmolding processes that create a permanent, non-delaminating bond between the silicone outer layer and metal inner core. Unlike slip-on rubber grips that shift, crack, or peel over time, our overmolded design delivers consistent long-term performance even in harsh temperature, chemical, and high-wear environments.

Our core selling points include: permanent bonding between LSR and metal, customizable hardness and dimensions for any application, compliance with standard material safety requirements, and resistance to extreme temperatures and common industrial contaminants.

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Technical Specifications

Material Properties

Physical Performance

Process Parameters

Our overmolding process adheres to the following controlled production parameters to ensure consistent quality:

• LSR Injection Molding Temperature: 160°C–180°C
• Curing Time: 30–90 seconds (varies by sleeve thickness)
• Post-Curing: 4 hours at 150°C to remove volatile organic compounds (VOCs)
• Core Surface Preparation: Sandblasting + primer treatment to maximize bond strength
• Dimensional Tolerance: ±0.10 mm for LSR outer layer, ±0.05 mm for metal core

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Product Advantages

1. Permanent Non-Delaminating Bond

Our production process combines mechanical surface pre-treatment of the metal core with chemical priming that creates a molecular-level bond between LSR and metal. Unlike assembled or glued grips, our overmolded sleeves will not separate, peel, or shift even after years of repeated use, heavy loading, or exposure to temperature fluctuations. This eliminates maintenance and replacement costs associated with loose slip-on grips.

1. Superior Ergonomics and Vibration Dampening

LSR has a natural soft, non-slip texture that stays comfortable even during prolonged handheld use. It effectively absorbs up to 30% more operational vibration than rigid plastic or solid rubber grips, reducing user fatigue and lowering the risk of repetitive strain injury (RSI) for workers using hand tools or industrial equipment daily. The non-porous surface of LSR also resists dirt and sweat buildup, keeping the grip clean and non-slip in wet or oily conditions.

1. Wide Environmental Compatibility

Our LSR material maintains consistent performance across a far wider temperature range than thermoplastic rubber (TPR) or natural rubber grips. It remains flexible in sub-zero temperatures down to -40°C and does not soften, degrade, or leach chemicals at continuous temperatures up to 200°C, making it suitable for both cold outdoor industrial applications and high-heat equipment use. It also resists corrosion of the inner metal core by blocking moisture, oils, and other corrosive contaminants from reaching the metal surface.

1. Customizable to Exact Requirements

We produce LSR overmolded metal handle grip sleeves in custom dimensions, hardness grades, and surface finishes to match your specific product design requirements. We can add texture, grooves, ergonomic contours, or color coding to the LSR outer layer to meet functional or branding needs, and work with customer-specified metal core materials to match required load-bearing capacities.

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Applications

LSR overmolded metal handle grip sleeves are used across a wide range of industrial and commercial applications, including:

• Hand Tools: Overmolded grips for wrenches, pliers, screwdrivers, hammers, and construction hand tools, where improved non-slip performance and vibration reduction are critical for user safety and comfort.
• Kitchen and Food Service Equipment: Grips for commercial cookware, cutting tools, food processing machinery handles, and catering equipment, where food-contact grade LSR meets basic hygiene requirements.
• Medical and Rehabilitation Equipment: Grips for walkers, crutches, wheelchair handles, examination table handles, and home care medical devices, where soft non-irritating LSR improves user comfort and resistance to regular cleaning and disinfection.
• Industrial Machinery and Fixtures: Handles for access ladders, machine guards, industrial doors, workshop workbenches, and material handling equipment, where durable slip-resistant grip improves workplace safety.
• Outdoor and Recreational Equipment: Grips for camping tools, fitness equipment, bicycle handlebar accessories, and boat cleat handles, where resistance to UV exposure and weathering extends product life.

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Selection Guide

Hardness Selection

Select the LSR outer layer hardness based on your application needs:

• 28–32 Shore A: Extra soft grip for applications requiring maximum comfort and vibration absorption, such as medical crutches, rehabilitation equipment, and long-duration handheld tools.
• 48–52 Shore A: All-purpose medium hardness, ideal for most hand tools, kitchen equipment, and industrial machinery handles, balancing comfort, grip, and wear resistance.
• 68–72 Shore A: Firm hardness for high-load industrial handles, heavy construction tools, and applications requiring added structural rigidity and maximum abrasion resistance.

Size Specifications

All our LSR overmolded metal handle grip sleeves are custom-manufactured to match your required dimensions. We accept specifications for inner metal core diameter, outer LSR diameter, total length, and end contour to integrate directly into your finished product. Standard stock sizes are not offered, as each sleeve is produced to match customer design requirements.

Material Grade

We offer two standard material grades:

• Industrial Grade: For general industrial, construction, and recreational applications, meets all standard performance and safety requirements for non-food contact use.
• Food-Contact Grade: LSR meets basic food safety requirements for use in kitchen equipment and food processing machinery, suitable for indirect food contact applications.

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Quality Assurance

At 橡楚（湖北）橡胶有限公司, we maintain a strict quality control system certified to ISO 9001, with inspection checks at every stage of production from raw material incoming inspection to final finished product testing. Each batch of LSR overmolded metal handle grip sleeves undergoes:

• Dimensional tolerance verification to confirm compliance with customer drawings
• Bond strength testing to check for delamination or adhesion failure
• Hardness and physical performance testing to confirm specification compliance
• Visual inspection for surface defects, gaps, or molding inconsistencies

We source all LSR raw materials from reputable suppliers, and do not use recycled or low-grade fillers in our production. If you have any questions about custom specifications, technical requirements, or ordering, please contact us at:

• Phone: 18071171144
• Email: churubber@163.com
• Address: 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号