SI series rod end bearings are designed for applications requiring precise movement and reliable connection.
Made with quality steel body and PTFE liner, they provide smooth operation, good wear resistance and stable performance. For inspection details, read our rod end assembly and PTFE liner guide.
We offer standard sizes, right-hand and left-hand threads, and customized solutions according to customer requirements. For model selection, SI generally denotes a right-hand female thread and SIL a left-hand female thread. Please confirm the bore diameter, thread size and pitch, thread direction, and required bearing construction against your drawing before ordering; SI T/K, SI-ES and SI-C variants should not be treated as interchangeable.
For male-thread versions, see our SA / SAL Series Rod End Bearings.
| Sliding Contact Pair | Steel / PTFE composite |
|---|---|
| Rod End Body | Medium-carbon steel, zinc plated |
| Outer Ring | Brass |
| Ball | Bearing steel, heat treated and hard chrome plated |
| Series | Thread Direction | Type |
|---|---|---|
| SI..T/K | Right-hand female thread | Maintenance-free / self-lubricating |
| SIL..T/K | Left-hand female thread | Maintenance-free / self-lubricating |
Dimensions are in mm unless noted. Basic load ratings are shown in kN.
| Model | Weight (kg) | Main Dimensions | Basic Load Rating | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | d3 | W | B | C1 min | h | d2 max | l4 max | l5 max | d4 max | d5 max | dk | l3 max | α ≈ | Dynamic (kN) | Static (kN) | ||
| SI3T/K / SIL3T/K | 0.006 | 3 | M3×0.5 RH/LH | 5.5 | 6 | 4.5 | 21 | 12 | 27 | – | 5 | 6.5 | – | 10 | – | 1.8 | 3.58 |
| SI4T/K / SIL4T/K | 0.009 | 4 | M4×0.7 RH/LH | 8 | 7 | 5.3 | 24 | 14 | 31 | – | 7.8 | 9.5 | – | 12 | – | 3.2 | 4.9 |
| SI5T/K / SIL5T/K | 0.016 | 5 | M5×0.8 RH/LH | 9 | 8 | 6 | 27 | 18 | 36 | 4 | 8.5 | 12 | 11.11 | 8 | 13 | 3.25 | 5.7 |
| SI6T/K / SIL6T/K | 0.027 | 6 | M6×1 RH/LH | 11 | 9 | 6.75 | 30 | 20 | 40 | 5 | 10 | 13 | 12.7 | 9 | 13 | 4.3 | 7.2 |
| SI8T/K / SIL8T/K | 0.047 | 8 | M8×1.25 RH/LH | 14 | 12 | 9 | 36 | 24 | 48 | 5 | 12.5 | 16 | 15.875 | 12 | 14 | 7.2 | 11.6 |
| SI10T/K / SIL10T/K | 0.077 | 10 | M10×1.5 RH/LH | 17 | 14 | 10.5 | 43 | 28 | 57 | 6.5 | 15 | 19 | 19.05 | 15 | 13 | 10 | 14.5 |
| SI12T/K / SIL12T/K | 0.115 | 12 | M12×1.75 RH/LH | 19 | 16 | 12 | 50 | 32 | 66 | 6.5 | 17.5 | 22 | 22.225 | 18 | 13 | 13.4 | 17 |
| SI14T/K / SIL14T/K | 0.17 | 14 | M14×2 RH/LH | 22 | 19 | 13.5 | 57 | 36 | 75 | 8 | 20 | 26 | 25.4 | 21 | 16 | 17 | 24 |
| SI16T/K / SIL16T/K | 0.23 | 16 | M16×2 RH/LH | 24 | 21 | 15 | 64 | 40 | 84 | 8 | 22 | 28 | 28.575 | 24 | 15 | 21.6 | 28.5 |
| SI18T/K / SIL18T/K | 0.32 | 18 | M18×1.5 RH/LH | 27 | 23 | 16.5 | 71 | 44 | 93 | 10 | 25 | 31 | 31.7 | 27 | 15 | 26 | 42.5 |
| SI20T/K / SIL20T/K | 0.42 | 20 | M20×1.5 RH/LH | 30 | 25 | 18 | 77 | 48 | 101 | 10 | 27.5 | 35 | 34.925 | 30 | 14 | 31.5 | 42.5 |
| SI22T/K / SIL22T/K | 0.54 | 22 | M22×1.5 RH/LH | 32 | 28 | 20 | 84 | 54 | 111 | 12 | 30 | 38 | 38.10 | 32 | 15 | 38 | 57 |
| SI25T/K / SIL25T/K | 0.75 | 25 | M24×2 RH/LH | 36 | 31 | 22 | 94 | 60 | 124 | 12 | 33.5 | 42 | 42.85 | 36 | 15 | 47.5 | 68 |
| SI28T/K / SIL28T/K | 0.82 | 28 | M27×2 RH/LH | 41 | 35 | 24 | 103 | 66 | 136 | 14 | 37 | 46 | 47.6 | 41 | 15 | 55 | 75.5 |
| SI30T/K / SIL30T/K | 1.3 | 30 | M30×2 RH/LH | 46 | 37 | 25 | 110 | 70 | 145 | 15 | 40 | 50 | 50.8 | 45 | 17 | 64 | 88 |
Send us the model number, quantity and destination. We’ll provide detailed dimensions, pricing and production information.
