SKF · mounted bearings
SKF FYJ 55 KF
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 mm |
|---|---|
| Housing overall width | 43 mm |
| Width, total | 57.5 mm |
| Centre distance between bolt holes | 130 mm |
| Bearing width, total | 39.9 mm |
| Attachment bolt diameter | 16 mm |
| Basic dynamic load rating | 43.6 kN |
| Basic static load rating | 29 kN |
| Limiting speed | 3600 r/min |
| Housing type | Flanged |
| Flanged housing type | Square |
| Number of bolt holes for fasteners | 4 |
| Fastening bolt hole type | Plain |
| Retaining feature, inner ring | Adapter sleeve |
| Bore type | Tapered |
| Rubber seating ring | Without |
| Material, housing | Cast iron |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing, bearing | Seal and flinger on both sides |
| Sealing type | Contact, standard |
| Sealing, unit | Without |
| Lubricant | Grease |
| Relubrication hole | With |
| Grease fitting | With |
| Unit system | Metric |
| Associated mounting tool | HN 11 |
| Product net weight | 2.98 kg |
| eClass code | 23-05-16-02 |
| UNSPSC code | 31171536 |
| Dimension | Order adapter sleeve separately |
| Compliance with standard | JIS |
| Purpose specific | For material handling applications |
| Sealing type, bearing | Contact, standard |
| Dimensions · Bore diameter · (d) | 50 mm |
| Dimensions · Outer diameter of inner ring · (d_1) · ≈ | 69.06 mm |
| Dimensions · Outside diameter of lock nut · (d_3) | 75 mm |
| Dimensions · Width of housing · (A) | 43 mm |
| Dimensions · Flange width · (A_1) | 17 mm |
| Dimensions · Depth of centring recess · (A_3) | 3.2 mm |
| Dimensions · Width of sleeve · (B_1) | 59 mm |
| Dimensions · Top external diameter · (D_b1) | 130 mm |
| Dimensions · Base external diameter · (D_b2) | 130 mm |
| Dimensions · Diameter of housing centering recess · (D_c) | 150.8 mm |
| Dimensions · Centre distance between bolt holes · (J) | 130 mm |
| Dimensions · Overall length · (L) | 162 mm |
| Dimensions · Diameter of attachment bolt hole · (N) | 19 mm |
| Dimensions · Distance from locking device side face to raceway centre · (s_1) | 32.5 mm |
| Dimensions · Overall width · (T) | 57.5 mm |
| Dimensions · Dimension | Value specified for s_1 is approximate and before the sleeve is driven into the bearing bore (sleeve and inner ring bore at starting position). |
| Dimensions · Threaded hole · Housing thread for grease fitting · (R_G) | 1/4-28 UNF |
| Dimensions · Threaded hole · Axial position of the housing thread · (R_1) | 25 mm |
| 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) | 148 mm |
| Dimensions · Dowel pins · Axial offset of dowel pins · (J_7) | 45 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 |
| Mounting information · Associated spanner | HN 11 |
| Mounting information · Recommended lock nut tightening angle · (α) | 90 ° |
| 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 | These square flanged ball bearing units are compliant with Japanese Industrial Standards (JIS). They consist of an insert bearing, locked to the shaft with an adapter sleeve, which enables the bearings to operate at higher speeds and run more smoothly. The bearing is mounted in a cast iron housing, which can be bolted to a machine wall or frame. Ball bearing units can accommodate moderate initial misalignment, but normally do not permit axial displacement. The adapter sleeve is not included in the unit and should be ordered separately. |
|---|---|
| Manufacturer features | Resist high levels of contamination • Designed for high temperatures and speeds • Accommodate relatively heavy loads • Cost-effective |
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.