1. Precision Manufacturing: Solid NBR rubber balls with accurate dimensions, consistent roundness, and custom size options.
2. Oil Resistance: Smooth-surface nitrile rubber balls with customizable colors and hardness for reliable valve sealing.
3. Wide Applications: Ideal for industrial valves, hydraulic systems, pneumatic equipment, and fluid control applications.
Notre Industrial NBR Rubber Balls are made from high-quality nitrile butadiene rubber (NBR) and designed for valve sealing and fluid control systems. These solid rubber balls feature excellent oil resistance, a smooth surface, and consistent roundness for reliable sealing performance. Suitable for hydraulic equipment, pneumatic systems, industrial valves, and fluid handling applications, our NBR valve balls are available in custom sizes from 4.5mm to 10mm, with customized colors, hardness levels, and dimensional tolerances. As a professional NBR rubber ball manufacturer and supplier, we provide precision manufacturing solutions to meet various industrial sealing requirements.
NBR balles en caoutchouc' Technical Sheet
| Article | Spécification |
|---|---|
| Nom du produit | NBR Solid Rubber Ball / NBR Sealing Ball |
| Matériel | NBR (caoutchouc nitrile butadiène) |
| Material Features | Excellent oil resistance, abrasion resistance and solvent resistance; good gas tightness and elasticity. Not suitable for ozone, strong oxidants and polar solvents (EPDM is suggested for weather & ozone service) |
| Couleur | Black (standard); custom colors available |
| Standard Size | φ4mm φ4.5mm φ4.76mm φ5mm φ5.3mm φ6mm φ8mm φ9.5mm φ10mm(+/-0.08mm)..... |
| Available Size | 1 mm–200 mm diameter; custom sizes accepted |
| Dureté | 70 Shore A (standard +/-5); custom range 40–90 Shore A |
| Service Temperature | -30 ℃ to +120 ℃ |
| Density | Approx. 1.1–1.3 g/cm³ (typical, compound-dependent) |
| Résistance à la traction | ≥ 8 MPa (typical, ASTM D412) |
| Elongation at Break | ≥ 250% (typical, ASTM D412) |
| Compression Set | Good (low compression set) |
| Dimensional Tolerance | ISO 3302 (±0.05–±0.2 mm by size) |
| Process | Compression molding; water-polished, smooth and burr-free |
| Applications | Valves, pumps, hydraulic equipment, fuel systems, oil pipelines, machinery sealing, pneumatic components |
| Certifications | ISO 9001, IATF 16949, RoHS |
| MOQ | 1 piece for stock size (sample order accepted), custom size according to size (100pcs ,300pcs ,500pcs ,ect) |
| Personnalisation | Size, color, hardness ,material and packing (OEM/ODM) |
| Conditionnement | PE bag / carton; custom logo and label supported |
| Sample | Disponible |
| Lead Time | Samples 3 days; bulk production per quantity |
| Brand | NBR BALLS (OEM/ODM orders welcome) |
Diverse Rubber Material Balls Options For Your Sealing Application
Our Rubber Ball Offerings Cover FKM, PTFE ,FFKM, NBR, EPDM And Silicone VMQ, Supporting Operating Temperatures Ranging From -50°C Up To +320°C. Every Compound Provides Distinct Advantages Against Oil, Chemicals, Heat And Cold. These Solid Rubber Balls Are Widely Used In Valve, Pump And Pipeline Sealing. We Can Customize Materials, Sizes And Tolerance Standards To Fit Your Exact Working Scenarios.
NBR(Buna-a，Niteile Rubber）
Oil&Water, Wear，Low temperature Resistance
Temp Range -40℃-120℃
Color Black
Hardness 50/60/70/80/90 Shore A
FKM (FPM,Viton,Fluoro Rubber)
Oil & Hydraulic Fluids, Chemical, High Temperature Resistance
Temp Range -20℃-220℃
Color Black Brown Green
Hardness 70/75/80/85/90 Shore A
EPDM Rubber （EPM）
Cooling Liquid & Brake Fluid，Ozone，Hot Water & Steam Resistance
Temp Range -45℃-150℃
Color Black
Hardness 40/50/60/70/80/90 Shore A
VMQ(Silicone Rubber)
Heat & Low Temperature ,Ozone ,Aging &Weather Resistance
Temp Range -55℃-204℃
Hardness 40/50/60/70 Shore A
PTFE (Teflon,Polytetrafluoroethylene)
Excellent Electrical Insulation, Chemical & Corrosion Resistance, Low Friction
Temp Range -200℃-260℃
Color White
Hardness 50~65 Shore D
Rubber balls applications
Rubber balls feature good elasticity and reliable sealing. Available in NBR, silicone, FKM and other materials. Widely used for vibrating screen mesh cleaning, valve & pump sealing, food & pharmaceutical equipment, oil/hydraulic pipelines, sanitary ware and shock absorption, suitable for oil resistance, high temperature resistance, chemical resistance and food-grade requirements.
Standard: GB/T 3672.1-2025
| d (mm) | M1 ±(mm) | M2 ±(mm) | M3 ±(mm) |
|---|---|---|---|
| 0.5 ＜ d ≤ 1.5 | 0.08 | 0.12 | 0.20 |
| 1.5 ＜ d ≤ 3.0 | 0.10 | 0.15 | 0.25 |
| 3.0 ＜ d ≤ 6.0 | 0.12 | 0.20 | 0.30 |
| 6.0 ＜ d ≤ 10.0 | 0.15 | 0.25 | 0.40 |
| 10.0 ＜ d ≤ 16.0 | 0.20 | 0.30 | 0.50 |
| 16.0 ＜ d ≤ 25.0 | 0.25 | 0.40 | 0.60 |
| 25.0 ＜ d ≤ 40.0 | 0.30 | 0.50 | 0.80 |
| 40.0 ＜ d ≤ 63.0 | 0.40 | 0.65 | 1.00 |
Diameter tolerance: Deviation of measured vs. nominal diameter; ground balls ≈ ±0.003 in (±0.08 mm), precision ground down to ±0.03 mm.
Sphericity: Consistency of diameter in all directions (total error), ≈ 0.003 in for ground balls — rounder = more uniform seal.
Surface roughness: Surface smoothness (Ra/μin); smoother = less leakage and wear.
Mold line / flash: Grinding removes parting lines and flash to eliminate local leak paths.
Dimensional stability: Resistance to thermal expansion, media swell, and compression set.
OEM & ODM Service
one-stop custom service:
OEM or ODM Processus de commande
Visual check, dimensional tolerance, Shore hardness, rebound, compression set, fluid resistance, heat aging, tensile property, sealing performance, density, cleanliness (food & pharma grade)
Visual Inspection: No pores, cracks, impurities, dents or scratches on surface; uniform color
Dimensional Inspection: Diameter, roundness, tolerance, measured by caliper or optical comparator
Hardness Test: Shore A hardness
Rebound Resilience Test
Tensile Strength & Elongation at Break
Compression Set (key indicator for sealing parts)
Fluid Resistance Test: Immersion test in oil, acid, alkali and solvent; weight change & volume change
Aging Test: Hot air aging, hardness and strength change after aging
Cleanliness Test (Food / Pharma Grade): Extractables, microbial test
Air Tightness & Sealing Performance Test (for valve balls)
Specific Gravity (Density) Test
Emballage, paiement et expédition
Our Products Range
We supply a full range of sealing products, including O-rings, solid rubber balls, gaskets, washers, flat seals, oil seals and custom special-shaped rubber seals. Standard and customized sizes are available for different working conditions.
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