SKF SI Series – Female Inch Rod End
Material: Steel/PTFE composite (maintenance-free)
Thread: UNF Right-Hand, Female
Lubrication: Grease nipple or relubricatable
Structure: Female thread / Spherical plain bearing / Steel-on-Steel
Bore Range: 3/16" – 3/4"
Application: Hydraulic cylinders, construction machinery, agricultural steering, industrial automation
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The SKF SI Series female inch (UNF) rod end bearings are the imperial-thread counterparts of the metric SI series. Featuring steel-on-PTFE composite sliding surfaces for maintenance-free operation, these rod ends serve North American-standard industrial linkages, agricultural machinery, and general mechanical systems.
Technical Specifications
| Bearing No. | Bore (d) mm | Thread | W (mm) | H (mm) | Dyn. Load Cr (kN) | Stat. Load Cor (kN) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| SI 3/16 | 4.76 | 10-32 UNF | 6.3 | 31.7 | 1.20 | 1.50 | 0.018 |
| SI 1/4 | 6.35 | 1/4-28 UNF | 7.9 | 41.2 | 2.20 | 2.80 | 0.035 |
| SI 5/16 | 7.94 | 5/16-24 UNF | 9.5 | 46.0 | 3.50 | 4.50 | 0.055 |
| SI 3/8 | 9.52 | 3/8-24 UNF | 11.1 | 57.1 | 5.40 | 6.70 | 0.090 |
| SI 1/2 | 12.70 | 1/2-20 UNF | 14.3 | 73.0 | 8.90 | 11.20 | 0.180 |
| SI 5/8 | 15.88 | 5/8-18 UNF | 17.4 | 88.9 | 12.50 | 16.00 | 0.310 |
| SI 3/4 | 19.05 | 3/4-16 UNF | 20.6 | 107.9 | 18.00 | 22.50 | 0.550 |
