SKF · mounted bearings
SKF SY 2. FM
Ball bearing units — manufacturer technical reference and quotation support in Saudi Arabia.
لطلب عرض سعر في السعودية، أرسل رقم القطعة أو المقاس والكمية والمدينة. يُرجى تأكيد التوافق والتوفر والسعر مع فريقنا.
| Shaft diameter | 50.8 mm |
|---|---|
| Centre height (pillow block) | 63.5 mm |
| Housing overall width | 60 mm |
| Centre distance between bolt holes | 171.5 mm |
| Bearing width, total | 48.4 mm |
| Attachment bolt diameter | 15.875 mm |
| Basic dynamic load rating | 43.6 kN |
| Basic static load rating | 29 kN |
| Limiting speed | 3600 r/min |
| Note | Limiting speed with shaft tolerance h6 |
| Housing type | Pillow block, normal base |
| Number of bolt holes for fasteners | 2 |
| Fastening bolt hole type | Plain |
| Retaining feature, inner ring | Eccentric collar |
| Bore type | Cylindrical |
| Rubber seating ring | Without |
| Material, housing | Cast iron |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing, bearing | Seal on both sides |
| Sealing type | Contact, standard |
| Sealing, unit | Optional end cover |
| Lubricant | Grease |
| Relubrication hole | With |
| Grease fitting | With |
| Unit system | Inch |
| Product net weight | 3.66 kg |
| eClass code | 23-05-08-02 |
| UNSPSC code | 31171536 |
| Compliance with standard | ISO |
| Purpose specific | For material handling applications |
| Sealing type, bearing | Contact, standard |
| Dimensions · Bore diameter · (d) | 50.8 mm |
| Dimensions · Shoulder diameter of inner ring · (d_1) · ≈ | 69.06 mm |
| Dimensions · Outside diameter of locking ring · (d_2) | 74.5 mm |
| Dimensions · Base width · (A) | 60 mm |
| Dimensions · Top width · (A_1) | 40 mm |
| Dimensions · Standout of end cover · (A_5) | 37.5 mm |
| Dimensions · Width of inner ring · (B) | 32.6 mm |
| Dimensions · Overall bearing width · (B_1) | 48.4 mm |
| Dimensions · Distance from locking device side face to thread centre · (B_4) | 7.9 mm |
| Dimensions · Height of spherical seat centre · (H) | 63.5 mm |
| Dimensions · Foot height · (H_1) | 24 mm |
| Dimensions · Overall height · (H_2) | 126 mm |
| Dimensions · Distance between attachment bolts · (J) | 171.5 mm |
| Dimensions · Maximum distance between attachment bolts · (J) · max. | 181 mm |
| Dimensions · Minimum distance between attachment bolts · (J) · min. | 162 mm |
| Dimensions · Overall length · (L) | 219 mm |
| Dimensions · Diameter of attachment bolt hole · (N) | 18 mm |
| Dimensions · Length of attachment bolt hole · (N_1) | 27.5 mm |
| Dimensions · Distance from locking device side face to raceway centre · (s_1) | 35.9 mm |
| Dimensions · Threaded hole · Housing thread for the grease fitting · (R_G) | 1/4-28 UNF |
| Dimensions · Threaded hole · Axial position of the housing thread · (R_1) | 4.5 mm |
| Dimensions · Threaded hole · Angular position of the housing thread · (R_α) | 45 ° |
| Dimensions · Grease fitting · Diameter of head sphere of grease fitting · (D_N) | 6.5 mm |
| Dimensions · Grease fitting · Hexagonal key size for the grease fitting · (SW_N) | 7 mm |
| Dimensions · Grease fitting · Thread of grease fitting · (G_N) | 1/4-28 SAE-LT |
| Dimensions · Dowel pins · Distance of dowel pins · (J_6) | 201 mm |
| Dimensions · Dowel pins · Axial offset of dowel pins · (J_7) | 21 mm |
| Dimensions · Dowel pins · Recommended diameter for dowel pins · (N_4) | 4 mm |
| Calculation data · Basic dynamic load rating · (C) | 43.6 kN |
| Calculation data · Basic static load rating · (C_0) | 29 kN |
| Calculation data · Fatigue load limit · (P_u) | 1.25 kN |
| Calculation data · Limiting speed | 3600 r/min |
| Calculation data · Dimension | Limiting speed with shaft tolerance h6 |
| Mounting information · Set screw · (G_2) | 7/16-20 UNF |
| Mounting information · Hexagonal key size for set screw | 5.556 mm |
| Mounting information · Recommended tightening torque for set screw | 28.5 N·m |
| Mounting information · Recommended diameter for attachment bolts, mm · (G) | 16 mm |
| Mounting information · Recommended diameter for attachment bolts, inch · (G) | 0.625 in |
Family specifications and selection conditions
| Product description | Pillow (plummer) block ball bearing units consist of an insert bearing mounted in a cast iron housing that can be bolted to a support surface. This variant is intended for use in applications where the direction of rotation is constant. It has a narrow inner ring and is locked onto the shaft by an eccentric locking collar, making it easy to mount. |
|---|---|
| Manufacturer features | Strong • Ready to mount • Lubricated and sealed bearing • Designed for rotation in one direction • Accommodate static initial misalignment |
Manufacturer references
Follow the complete manufacturer documentation for application restrictions, materials, tolerances and installation requirements. Limits may not apply simultaneously. We do not publish inferred stock, pricing or ratings.