Products
Bellows
Round rubber bellow
- Round rubber bellow for shaft and screw protection are protective components specifically designed for axial transmission elements. They are primarily used to protect screws, hydraulic cylinders, pneumatic cylinders, etc., from oil, water, dust, or foreign objects entering the transmission mechanism during reciprocating motion, thus preventing impact on operational accuracy and service life.
- These round bellows are also commonly used for fluid level control and protection in electrical discharge machining (EDM) machines, as well as for full-stroke protection of ultra-long-stroke screws. To meet rapid delivery requirements, standardized size charts are provided for quick selection of standard specifications including inner diameter, outer diameter, flange type, and flange configuration; customized designs based on the application environment are also supported. Commonly used materials comply with EU RoHS regulations.
- When Should You Use Round Rubber Bellows?
- Round rubber bellows are an ideal solution when:
- 1. The transmission moves in axial linear reciprocating motion
- 2. Screws or cylinders need protection from oil, water, or dust
- 3. Long stroke travel requires full-length coverage
- 4. A balance of sealing, flexibility, and durability is required
- 5. Fast delivery is needed using standard sizes, or custom sizing is preferred
- Compared to fabric or metal covers, rubber bellows offer better sealing, easier installation, and higher flexibility.
- Structure & Material Options (Easy to Select)
- 1. Bellows body: Industrial rubber materials
- 1-1. Oil-resistant, heat-resistant, waterproof, dustproof
- 1-2. Resistant to weak acids and common industrial chemicals
- 2. Fixing methods:
- 2-1. Sheet metal flanges
- 2-2. Clamp / band fastening
- 3. Optional internal features:
- 3-1. Branch pipe structure for shape stability
- 3-2. Pressure-equalizing air holes to prevent bulging
- Materials and structure are selected based on temperature, media type, stroke length, and operating frequency.
- Key Benefits Buyers Care About
- 1. Excellent sealing to block contamination
- 2. Flexible and elastic design for smooth motion
- 3. Suitable for screws, hydraulic cylinders, and pneumatic cylinders
- 4. Standard sizes available for quick shipment
- 5. Fully customizable for diameter, stroke, and environment
- Standard Sizes + Custom Support
- To shorten lead time, standard size charts are available for fast selection of inner diameter, outer diameter, and flange type.
- For special applications, full customization is supported based on:
- 1. Inner / outer diameter and wall thickness
- 2. Compressed length and maximum extension stroke
- 3. Mounting method and operating environment
- All commonly used materials comply with EU RoHS requirements.
- Typical Applications
- 1. Ball screws and linear transmission systems
- 2. Hydraulic and pneumatic cylinders
- 3. EDM fluid level control systems
- 4. Injection molding and forming equipment
- 5. Industrial automation machinery
- Properly selected round rubber bellows reduce contamination risk, maintain accuracy, and extend equipment service life.
- FAQ｜Common Issues with Round Rubber Bellows
- Q1: What components are round rubber bellows used for?
- Mainly screws, hydraulic cylinders, and pneumatic cylinders with axial motion.
- Q2: Are they oil- and heat-resistant?
- Yes. Material options provide oil resistance, heat resistance, and waterproof performance.
- Q3: Are standard sizes available?
- Yes. Standard specifications allow faster delivery; custom sizes are also available.
- Q4: Can they be fully customized?
- Yes. Diameter, stroke, material, and mounting can all be customized.
- Q5: Why are air holes sometimes needed?
- They balance internal pressure and prevent bulging during high-speed or long-stroke operation.
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