Bosch Rexroth material number R165121320 is the KWD-025-FNS-C1-H-1 Ball Runner Block Size 25, FNS Format, C1 Low Preload, Accuracy H (ball runner block, FNS, size 25, steel CS, accuracy high, low preload, without ball chain).
Ball runner blocks run on profiled guide rails and carry the load of a linear axis with low friction and high rigidity; size, flange design, preload and accuracy class are all in the material number.
More Rexroth hydraulic and linear-motion parts: Bosch Rexroth range.
Technical data
| Material number | R165121320 |
|---|---|
| رمز الموديل | KWD-025-FNS-C1-H-1 |
| Version | Ball rail system |
| المقاس الاسمي | 25 mm |
| Format | FNS – flange, normal, standard height |
| Model | High-precision ball runner block |
| Material (profiled rail systems) | Carbon steel |
| Preload class | C1 – Low preload |
| Accuracy class | H – Highly accurate |
| Seal | SS – Standard seal |
| Ball chain | Without ball chain (standard) |
| Lubrication | Pre-lubricated, preserved |
| Self-aligning for compensation of misalignments | Without self-alignment |
| Width of runner block | 70 mm |
| Length of runner block | 86.2 mm |
| Height of runner block | 29.9 mm |
| Height runner block with guide rail | 36 mm |
| Maximum acceleration rate amax | 500 m/s² |
| Maximum permissible linear speed vmax | 5 m/s |
| Permissible ambient temperature (min. … max.) | -10 °C … +80 °C |
| Friction coefficient μ | 0.002 … 0.003 |
| الوزن | 0.65 kg |
| Dynamic load capacity C50 | 36000 N |
| Dynamic load capacity C100 | 28600 N |
| Static load capacity C0 | 35900 N |
| Dynamic torsional moment load capacity Mt50 | 520 Nm |
| Dynamic torsional moment load capacity Mt100 | 410 Nm |
| Static torsional moment load capacity Mt0 | 510 Nm |
At a glance
- Area of application: For high rigidity requirements
- Excellent dynamic characteristics
- Significantly reduced frictional oscillations and low friction force level, particularly under external load
- Maximum precision
- Patented entry zone increases the travel accuracy up to a factor of six
- Attachments on the ball runner block can be mounted from above and below
- Lube fittings with metal threads on all sides
- End-face fastening thread for all attachments
Typical applications
- Automation and handling axes
- Measuring and inspection equipment
- Machine tools and machining centres
- Packaging machines
- Replacement of a worn carriage
Compatibility and replacement
Order with the 10-character material number R165121320; in Rexroth codes every character (size, format, length, preload, accuracy class and seals) changes the part, so the type code KWD-025-FNS-C1-H-1 on the nameplate should match exactly.
The values in the table come from the official Bosch Rexroth product data. If your old part carries an older series index, send us a photo of the nameplate and we will confirm the current equivalent.
Before you replace it
- Seals and lubrication
- Size
- Accuracy class
Frequently asked questions
What accuracy class does it have?
H – Highly accurate, according to the Bosch Rexroth product data.
How much does it weigh?
0.65 kg, according to the Bosch Rexroth product data.
Can you help me identify the right replacement?
Yes. Send us a photo of the label of the old part, or its full order code, and we will confirm the exact match or the official successor before quoting.
How fast can you deliver, and is there a warranty?
Air shipping usually takes 5 to 7 days once the part is ready, to almost any country. Each part is new and original with a 1-year warranty. Message us on WhatsApp with the order number for a quotation.
Before you order
Compare the complete order number on the old unit with this page, including the suffix: in most ranges the last characters set the coil voltage, current range or version. If the label is worn, send us a photo and we will identify the part.
Every part RendatSP supplies is new and original, carries a 1-year warranty and ships worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Send us the order number and quantity on WhatsApp or through the inquiry form and we will quote the same working day. Agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
