BOSCH REXROTH R165129420 Linear Ball Bearing Runner Block 70MM 86.2MM 36MM
( Brand: Bosch Rexroth ), ( Manufacturer Part Number: R165129420 ), ( Part Type: Bearing Linear Block )
Review BOSCH REXROTH Linear Ball Bearing Runner Block 70mm 86.2mm 36mm
The **Bosch Rexroth R165129420 Linear Ball Bearing Runner Block** is a high-performance, precision-engineered component designed to deliver exceptional reliability and smooth operation in demanding industrial applications. This robust runner block features a compact yet durable construction, combining a **70mm outer diameter** with a **36mm inner bore** and an overall length of **86.2mm**, making it ideal for applications requiring precise linear motion with minimal friction. Crafted from high-quality materials, including hardened steel and precision-ground surfaces, the block ensures long-lasting wear resistance and consistent performance even under heavy loads or continuous use. Its integrated **ball bearing system** distributes load evenly across multiple contact points, reducing wear on both the block and the guide rail while maintaining smooth, low-friction movement. The design incorporates tight tolerances and optimized geometry to minimize play and vibration, making it well-suited for automation systems, conveyor belts, indexing tables, and other applications where accuracy and efficiency are critical. Whether integrated into a custom linear guide system or used as part of a larger assembly, this runner block exemplifies Bosch Rexroth s commitment to engineering solutions that balance durability, precision, and operational longevity. Its modular design also allows for easy integration into existing machinery, ensuring seamless compatibility with other Rexroth components while maintaining the high standards of performance expected from this industry-leading brand.
### **Bosch Rexroth R165129420 Linear Ball Bearing Runner Block (70mm 86.2mm 36mm) Pros and Cons**
#### **Pros:**1. **High Precision and Load Capacity** Bosch Rexroth is a reputable brand known for high-quality linear motion components. This runner block is designed for smooth, low-friction movement, making it suitable for applications requiring precision, such as CNC machines, robotics, or automated assembly lines. The ball bearing design distributes load evenly, reducing wear and increasing durability.
2. **Compatibility with Rexroth s Linear Guide Systems** This block is part of Bosch Rexroth s modular linear guide system, meaning it integrates seamlessly with other Rexroth components like rails, carriages, and actuators. This ensures consistent performance and easier maintenance.
3. **Low Friction and Energy Efficiency** The ball bearing mechanism minimizes friction, reducing energy consumption and heat generation. This is beneficial for long-running applications where efficiency is critical.
4. **Durability and Long Lifespan** Rexroth components are built to withstand heavy loads and repeated cycles. The hardened steel balls and precision-machined surfaces contribute to a longer operational life, reducing downtime and replacement costs.
5. **Wide Range of Applications** Suitable for industrial automation, medical equipment, packaging machines, and other precision motion control systems. The compact size (70mm 86.2mm 36mm) makes it versatile for space-constrained designs.
6. **Reliability and Brand Reputation** Bosch Rexroth is a trusted name in industrial automation, known for reliability and engineering excellence. Purchasing from an authorized distributor ensures genuine parts with proper warranties and support.
7. **Easy Installation and Maintenance** The modular design simplifies assembly, and the sealed bearing prevents contamination, reducing the need for frequent lubrication or adjustments.
---
#### **Cons:**1. **High Cost Compared to Generic Brands** Bosch Rexroth components are premium-priced. For budget-sensitive applications, aftermarket or generic alternatives (e.g., THK, NSK, or Chinese brands) may offer similar performance at a lower cost.
2. **Limited Availability of Spare Parts** While Rexroth parts are durable, if the block fails, sourcing replacements may be slower or more expensive than for more widely available brands. Stocking spare parts requires planning.
3. **Potential Overkill for Light-Duty Applications** If the application involves very light loads or low-speed movements, a more affordable linear bearing (e.g., plastic or sleeve bearings) might suffice without the need for a high-precision ball bearing block.
4. **Compatibility Issues with Non-Rexroth Systems** If the system uses components from other manufacturers, integration may require additional adapters or modifications, adding complexity and cost.
5. **Sensitivity to Contamination** Like all precision bearings, this block is vulnerable to dust, debris, or moisture. Proper sealing and maintenance are essential to prevent premature wear.
6. **Lead Times for Custom or Special Orders** While standard models are readily available, custom configurations (e.g., different sizes, materials, or coatings) may incur longer lead times.
7. **Training and Expertise Required** Installing and maintaining Rexroth systems may require specialized knowledge. Without proper training, setup errors or improper lubrication could reduce performance.
---
### **Conclusion**
The **Bosch Rexroth R165129420 linear ball bearing runner block** is an excellent choice for applications demanding **high precision, durability, and reliability**. Its superior load capacity, low friction, and seamless integration with Rexroth s ecosystem make it ideal for industrial automation, robotics, and CNC systems where performance and longevity are critical.
However, the **higher cost, potential over-engineering for light-duty uses, and dependency on Rexroth s ecosystem** may not justify the investment for all users. If budget constraints or compatibility issues are concerns, alternatives like **THK, NSK, or high-quality aftermarket brands** could offer comparable performance at a lower price.
For most **high-end industrial or precision motion control applications**, the Rexroth block is a **strong recommendation** due to its proven track record. For cost-sensitive or low-load applications, a thorough cost-benefit analysis is advised.
---
### **Final Recommendation:** - **Buy the Bosch Rexroth R165129420 if:**- You require **high precision, heavy load capacity, and long-term reliability** in an industrial or automated system.
- Your application is **compatible with Rexroth s linear guide system** and you can justify the premium cost.
- You prioritize **minimal maintenance and energy efficiency**.
- **Consider alternatives if:**- Your budget is limited, and a **mid-range brand (e.g., THK, NSK)** offers similar performance at a lower cost.
- The application involves **light loads or low-speed movements**, where a simpler bearing may suffice.
- You lack **access to Rexroth s support network** and need faster spare part availability.
Always verify **compatibility with your existing system**, check **lead times and pricing from authorized distributors**, and ensure proper **installation and maintenance procedures** are followed to maximize the block s lifespan.
Details:
Specifications: model #: R165129420, KWD-025-FNS-C0-N-1. Dynamic: 28600N. This is a surplus item. Bosch Rexroth Linear Ball Bearing Runner Block.
Load Capacity: Static: 35900N. Nominal Size: 25mm.
part #: r165129420 prices
- $36.00-$108.00
specifications linactuat:
- brand: Bosch Rexroth
- mpn: R165129420
- part type: Bearing Linear Block
offer linactuat:
- availability: In Stock
- sold: 0
- options: Ship-to-home
- quantity: 13
- best offers: True
- started: March 12, 2026
shipping linactuat:
- carrier: USPS, UPS
- service: USPS First Class, USPS Priority Mail Padded Flat Rate Envelope, UPS Next Day Air
- class: Standard, Expedited, One-day
- cost: $0.00
- type: Calculated
- transit: 2-5 Days
payments linactuat:
- other
- cash
- wallet: Paypal
- credit card: Visa
general linactuat:
- Industrial Automation Motion Controls > Rotary Linear Motion > Slides, Rails Carriages
- condition: Used
seller linactuat:
- city: Osseo, Minnesota
- # reviews: 44224
- rating: 100.0%
returns linactuat:
- method: Money back
- paid by: Seller
- time: 30 Days
- policy: Returns Accepted
Bosch Rexroth R165129420 Is Similar To:
- 1085-630-20 Bosch Rexroth Star Linear (37.2% similar) Bosch Rexroth star linear bearing block set new, unused surplus in open factory box...(December 14th, 2017)
- 1140-260-10 Bosch Rexroth Boscht 3225mm (36.5% similar) Item must be in the original condition received...(November 19th, 2017)
- 15-110 Rexroth Bosch 4-axis Cartesian (28.3% similar) We verified that the computer was able to control robot in all axes as well release grab tool changer module. Manufacturer: Rexroth condition: used. Please for details. This lot is in good cosmetic condition with minor normal blemishes from prior use. We tried to label the cut cables so it would ...(June 16th, 2017)
- 1512-1-1003 Bosch Rexroth Intelligent Motion (38.3% similar) ...(July 4th, 2017)
- 1624-332-10 Bosch Rexroth Star Linear (37.2% similar) Rexroth star Bosch linear motion bearing block R16932035...(August 17th, 2017)
- 1659-6 Star 1659-520-07 Size Bosch Rexroth (22% similar) ...(March 8th, 2017)
- 1666-894-22 Rexroth Star Bosch New Linear Lm Runner Block Bearings Cnc (43.8% similar) New star Rexroth linear runner block bearings with 'ball chain' for low noise offer price is 1 bearing, I have many available these are bearings still in original packaging. They are model 1666 'slimline', size 20MM ball rail runner blocks. These runner blocks have ball-chain bearings for reduced ...(April 21st, 2018)
- 1821-422-10 Bosch Rexroth Star Linear (37.2% similar) Rexroth star Bosch linear motion bearing block R182142210...(July 22nd, 2017)
- R156050000 625mm Bosch Rexroth Emc80 Mechanical Cylinder System (38.8% similar) Catalogs ecm web 09. Potomac an offer and get a deal. Bosch Rexroth us...(October 13th, 2016)
- R156050000 80-82 Bosch Rexroth Linear Actuator Emc (39.7% similar) Part number R156050000BOSCH Rexroth quantity available 1 make and offer get the deal. Catalogs R999000493 en ecm g2 media...(October 22nd, 2016)
- Mkk15-65 Bosch Rexroth Linear Actuator (38.6% similar) Factory rebuilt. Add grease before use. Cleaned, screw reload reset with new ball bearings, wiper seals and pickup fingers...(April 20th, 2017)
