Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
HNBR Semi-finished Tube for CNC Seal Turning
HNBR tube is used for machining into rubber seal ring
Material: HNBR
Color: Black
Hardness: 85 shore A
Temperature: -40 to 150℃
5.0
design customization
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Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
1. Description
HNBR, or Hydrogenated Nitrile Butadiene Rubber, is a high-performance elastomer derived from nitrile rubber (NBR) through a hydrogenation process that reduces unsaturation in its polymer structure. This modification enhances its thermal stability, chemical resistance, and mechanical strength, making it a versatile material for demanding industrial applications where standard NBR or other elastomers may lack durability.
2. Chemical & Media Resistance
✅ Excellent Resistance: Mineral oil, diesel, gasoline, lubricating oil, hydraulic oil, grease, water, aqueous solution, common hydraulic fluids ❌ Poor Resistance: High temperature steam, strong acid & strong alkali, ketones, esters, aromatic solvents, ozone, weather aging (outdoor use not recommended)
3. Size & Tolerance Specification
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Shape: Standard hollow cylindrical rubber billet
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Dimensions: Standard stock OD/ID sizes, custom sizes available; 0.3~1mm single-side machining allowance reserved
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Color: Black
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Tolerance: OD ±0.2~0.4mm (unprocessed billet)
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Standard Length: 120mm, 150mm
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Surface: Smooth vulcanized surface, no bubbles, no cracks, no impurities
4. Manufacturing & Processing Method
NBR compound mixing → hollow tube extrusion → high-temperature full vulcanization → fixed-length cutting → finished semi-finished tube. End users can directly process various non-standard and standard seals through CNC lathe turning, which saves mold opening cost and is efficient for small-batch and multi-specification production.
5. Application Scenarios
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General hydraulic and pneumatic equipment seals (O-rings, U-seals, wiper seals, gaskets)
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Automotive conventional parts: engine oil seals, chassis oil-resistant seals
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Mechanical equipment, bearings, pumps and valves oil-resistant sealing
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Household appliances, electronic equipment conventional sealing parts
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Food and beverage equipment (FDA grade NBR tube)
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