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Industrial Bakelite Handle Ball, Oil-Proof Non-Conductive Knob with Metal Insert
- Category：Industrial Handle Parts
- Temperature: 150–200℃
- Material: Phenolic plastic (PF), made of phenolic resin mixed with wood powder/asbestos filler, cured at high temperature and pressure (thermosetting plastic, non-re-meltable)
- Color: Yellow (black and red are the most commonly used colors)
- Hardness: High hardness, smooth and wear-resistant surface, comfortable to hold, not easy to wear during long-term use
- Product description: This bakelite handle ball (also known as phenolic handle ball) is a high-performance thermosetting plastic operating part, designed for industrial, high-temperature and insulation scenarios.
5.0
design customization
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1. Material and Characteristics
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Material: Phenolic resin + wood powder/asbestos filler, cured at high temperature and pressure, cannot be melted again.
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Core Performance
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Heat Resistance: No deformation at 150–200℃ for a long time, far superior to ordinary plastics (60–120℃).
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Insulation: Non-conductive, suitable for the operation of electrical tools and live equipment.
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Environmental Resistance: Oil-resistant, acid-alkali-resistant and moisture-proof, durable in harsh environments.
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High Hardness: Smooth and wear-resistant surface, comfortable to hold.
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Disadvantages: High brittleness, fear of heavy impact, poor elasticity.
2. Specifications and Models (JB/T 7271.1)
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Types
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Type A: No metal insert, bakelite thread, low cost.
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Type B: Embedded with brass/iron thread, high strength, detachable and reusable.
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Common Sizes (Thread × Ball Diameter): M6×20, M8×25, M10×32, M12×40, M16×50.
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Colors: Standard black, bright red, industrial blue, orange, milk white; black/red are the most commonly used.
3. Main Applications
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Industrial Machinery: Adjustment knobs and handles for machine tools, combined machine tools and woodworking machinery.
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High-Temperature Equipment: Handles for electric soldering irons, electric welding machines, ovens, boilers and heat treatment equipment.
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Valves and Pipes: Operation heads for plumbing, gas and industrial valves.
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Electrical Tools: Non-slip grips for screwdrivers, wrenches and insulated pliers.
4. Comparison with Ordinary Plastic Handle Balls
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Comparison Items
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Bakelite Handle Ball
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Ordinary Plastic (ABS/PP) Handle Ball
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|---|---|---|
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Heat Resistance
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150–200℃
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≤120℃, easy to deform
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Insulation
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Excellent
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General
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Durability
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Oil-resistant, wear-resistant, long service life
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Easy to age and wear
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Cost
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Medium-high
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Low
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Scenarios
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Industrial/high-temperature/insulation
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Normal temperature/household/low load
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5. Selection Suggestions
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High-temperature/insulation scenarios: Prioritize Type B bakelite handle ball (metal insert is more durable).
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Normal temperature and low load: Type A or ordinary plastic models can be selected to control costs.
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Thread specification: Choose M6–M16 according to the equipment shaft diameter, and the ball diameter matches the holding space.
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Color: Black is universal, and red is used for emergency/safety operations.
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