STO 25 X Bore 25 Mm, Support Rollers Without Flange Rings, With An Inner Ring
The STO 25 X Support rollers (yoke-type track rollers) are widely used in heavy-duty linear motion and cam-driven systems, such as: forklift masts (lifting rollers), AGV trolleys (load-bearing rollers), stacker cranes (guide rails), machine tool guide rails (support rollers), automated production lines, and track tensioning devices for construction machinery.
The STO 25 X bearing is a Support rollers without flange rings, with an inner ring with an inner diameter of 25 mm , an outer diameter of 52 mm, a width of 16 mm. GCr15SiMn rings, GCr15SiMn rolling mlement. It uses CN standard radial clearance, Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
STO 25 X bearings ( 25 mm x 52 mm x 16 mm) have the advantages of Featuring a thick-walled outer ring and integral bearing design, it boasts high load-bearing capacity and rigidity, making it particularly suitable for heavy-duty rail support applications, and are therefore widely used in the Conveyor, Material handling equipment, forklifts, stacker cranes, automated warehouses and rail guide systems.
| Part Number | STO 25 X |
| Bearing Type | Support rollers without flange rings, with an inner ring |
| Design | STO = Support roller without a flange ring, fitted with a needle roller and cage assembly. |
| Relubrication feature | Yes |
| Heat stabilized | 140 °C (280 °F) |
| Coating | No |
| Lubricant | Grease |
| Axial guidance of outer ring | No |
| Sealing | Open |
| Cage type | Window-type, centring depends on size and design |
| Cage Material | Sheet steel |
| Outer ring | X = Cylindrical |
| Radial internal clearance | CN |
| Interchangeable | SKF STO 25 X |
| Radial Dynamic - Cr [lbf] | 3709 |
| Radial Static - C0r [lbf] | 5125 |
| Fatigue load limit - Pu [lbf] | 606 |
| Max. dynamic radial load - Fr max. [lbf] | 4046 |
| Max. static radial loads - F0r max. [lbf] | 5844 |
| Speed ratings - nG [min–1] | 3400 |
| Outside - D Φ [inch] | 2.047 |
| Width - B [inch] | 0.630 |
| Inside - d φ [inch] | 0.984 |
| Width - C [inch] | 0.622 |
| Chamfer - r1,2 min. [inch] | 0.012 |
| Chamfer - r3,4 min. [inch] | 0.012 |
| Weight [lb] | 0.390 |
| Raceway diameter inner ring - F [inch] | 1.181 |
| Raceway diameter outer ring - E [inch] | 1.457 |
The STO 25 X Support rollers (yoke-type track rollers) mainly consist of a thick-walled outer ring, a yoke-type inner ring with mounting holes, needle rollers or cylindrical rollers, and a sealing device. The outer surface of the outer ring can be designed as a cylindrical or spherical surface, and the inner ring adopts an integrated yoke structure, directly fixed to the equipment with bolts.
Support rollers (yoke-type track rollers) have high load-bearing capacity. The thick-walled outer ring and needle roller structure provide excellent radial load-bearing capacity and strong impact resistance. Installation is simple, requiring no bearing housing; direct bolt fixing is sufficient. Operation is smooth, and some models with a spherical outer ring can automatically adjust to track deviations. They have good sealing performance and are suitable for harsh working conditions such as dust and humidity.
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