Bosch Rexroth material number R165121323 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, with 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 | R165121323 |
|---|---|
| Type code | KWD-025-FNS-C1-H-1 |
| Version | Ball rail system |
| Nominal size | 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 | LS – Low-friction seal |
| Ball chain | With ball chain |
| 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.) | 0 °C … +80 °C |
| Friction coefficient μ | 0.002 … 0.003 |
| Weight | 0.65 kg |
| Dynamic load capacity C50 | 33600 N |
| Dynamic load capacity C100 | 26700 N |
| Static load capacity C0 | 32300 N |
| Dynamic torsional moment load capacity Mt50 | 480 Nm |
| Dynamic torsional moment load capacity Mt100 | 380 Nm |
| Static torsional moment load capacity Mt0 | 460 Nm |
At a glance
- Area of application: For high rigidity requirements
- Attachments on the ball runner block can be mounted from above and below
- 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
- Ball chain for low noise level and best travel behavior
- Lube fittings with metal threads on all sides
- End-face fastening thread for all attachments
Typical applications
- Replacement of a worn carriage
- Automation and handling axes
- Measuring and inspection equipment
- Machine tools and machining centres
- Packaging machines
Compatibility and replacement
Order with the 10-character material number R165121323; 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
- Size
- Seals and lubrication
- Accuracy class
Frequently asked questions
How much does it weigh?
0.65 kg, according to the Bosch Rexroth product data.
What accuracy class does it have?
H – Highly accurate, according to the Bosch Rexroth product data.
Can I get the datasheet?
The official manufacturer data is the source of the technical values above; we can send the datasheet with the quotation on request.
Can I get a price and delivery time?
Prices are quoted on request. Send the order number, quantity and delivery country on WhatsApp and we will reply with price and delivery time; air shipping is usually 5 to 7 days once ready, with a 1-year warranty.
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.
Need it fast? Send the order number, quantity and delivery country on WhatsApp or through the inquiry form and we reply with a quotation the same working day. All parts are new and original, covered by a 1-year warranty, and ship worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Local agents: Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
