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| Parameter | SKFKRE 52 PPCam follower (stud-type track roller) with eccentric collar, integral sealing and relubrication feature | INAKRE52-PP20 × 52 × 66 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | SKF | INA |
| Designation | KRE 52 PP | KRE52-PP |
| Product family | Cam followers (Stud-type track rollers) | — |
| Detailed type | Cam follower (stud-type track roller) with eccentric collar, integral sealing and relubrication feature | Stud type track roller |
| Series | — | KRE52 |
| Bore diameterd | — | 20 mm |
| Outside diameterD | 52 mm | 52 mm |
| WidthB | — | 66 mm |
| Basic dynamic load ratingC | 16.1 kN | 16.7 kN |
| Basic static load ratingC0 | 28 kN | 29.5 kN |
| Fatigue load limitPu | 3.35 kN | 3.85 kN |
| Limiting speednG | 2800 r/min | 2400 r/min |
| Mass≈m | 0.534 kg | 0.49 kg |
| Internal clearance | Between C2 and CN | — |
| Sealing | Seal on both sides | — |
| Cage | With | — |
| Bearing material | Bearing steel | — |
| Lubricant | Grease | — |
| Dimensions | ||
| Functional outside diameter | 52.0 mm | — |
| Stud diameter | 24.0 mm | — |
| Length | 66.1 mm | — |
| Width, outer ring | 24.0 mm | — |
| Engineering — Calculation data | ||
| Maximum dynamic radial loadsF r | max. 35.5 kN | — |
| Maximum static radial loadsF 0r | max. 50 kN | — |
| Engineering — Dimensions | ||
| Attachment diameterd | 24 mm | — |
| Total lengthB | 66.1 mm | — |
| Width outer ringC | 24 mm | — |
| Length shank on studB 1 | 40.5 mm | — |
| Distance lubrication hole to flange ringB 2 | 9 mm | — |
| Width locking collarB 3 | 18 mm | — |
| Distance face outer ring to face side washerC 1 | 0.8 mm | — |
| Outside diameter flange ringd 1 | 36 mm | — |
| Thread studG | M20x1.5 | — |
| Length threadG 1 | 21 mm | — |
| Seat diameter for lubrication accessoriesM | 6 mm | — |
| Diameter of lubrication hole (shank)M 1 | 4 mm | — |
| Width across flatsSW | 10 mm | — |
| Eccentricityc | 1 mm | — |
| Engineering — Included products | ||
| Grease fitting | NIP B2x8 | — |
| Hexagonal nut | M 20x1.5 | — |
| Engineering — Mounting information | ||
| Recommended tightening torque | 120 N·m | — |
| Logistics | ||
| Product net weight | 0.534 kg | — |
| eClass code | 23-05-09-03 | — |
| UNSPSC code | 31171512 | — |
| Manufacturer Identity | ||
| Schaeffler Product Code | — | 399958 |
| Base Type | — | KRE52 |
| Gpsd Group | — | I03 |
| Product Line Id | — | 13 |
| X Life Marking | — | n.r. |
| Product identity | ||
| Official product category | Cam followers (Stud-type track rollers) | — |
| Official taxonomy path | /products/rolling-bearings/track-rollers/cam-followers | — |
| Structure group ID | BNT_004 | — |
| Available from SKF | Yes | — |
| Remanufacturable | No | — |
| Product Identity | ||
| Construction | — | Stud type track rollers KRE..-PP-A, single row needle roller bearings with particularly thick-walled outer ring, needle roller and cage assembly and a solid roller stud with fixing thread and a mounting aid, axial guidance of outer ring is provided by the plastic axial plain washers, contact flange and contact washer, three-stage sealing by plastic axial plain washer on both sides, with eccentric collar |
| Short Description | — | Stud type track roller |
| Properties | ||
| Rolling elements | Needle rollers | — |
| Number of rows | 1 | — |
| Outer ring profile | Crowned | — |
| Stud alignment | Centric stud with eccentric collar | — |
| Number of flanges, outer ring | 2 | — |
| Feature for tightening | Hexagonal recess | — |
| Radial internal clearance | Between C2 and CN | — |
| Tolerance class | Other | — |
| Material, bearing | Bearing steel | — |
| Coating | Without | — |
| Sealing type | Contact | — |
| Relubrication feature | Centre of each stud end | — |
| Technical Data | ||
| Fit Diameter Of Roller Stud / Stud (D1) | — | 20 mm |
| Outside Diamater (D) | — | 52 mm |
| Total Width (B) | — | 66 mm |
| Basic Dynamic Load Rating, Radial (Cr W) | — | 16,700 N |
| Basic Static Load Rating, Radial (C0R W) | — | 29,500 N |
| Eccentricity (E) | — | 1 mm |
| Speed On Permanent Grease Lubrication (Nd G) | — | 2,400 1/min |
| Distance To Lubrication Hole (B3) | — | 9 mm |
| Bolt/Stud Length Effectively (B2) | — | 40.5 mm |
| Diameter Lubrication Hole (D3) | — | 4 mm |
| Diameter Of Eccentric (De) | — | 24 mm |
| Width, Outer Ring (C) | — | 24 mm |
| Protrusion Outer Ring To Thrust Washer (C1) | — | 0.8 mm |
| Thread Length (Ig) | — | 21 mm |
| Nominal Dimension For Hexagonal Socket (W) | — | 10 mm |
| Stop Diameter Of Thrust Washer (D2) | — | 36.5 mm |
| Tightening Torque Nut (Ma) | — | 120 Nm |
| Fatigue Load Limit, Radial (Cur W) | — | 3,850 N |
| Minimum Chamfer Dimension (Rmin) | — | 1 mm |
| Witdh Of Thrust Washer (B1) | — | 25.6 mm |
| Width, Eccentric (Be) | — | 18 mm |
Independent reference comparison based on the manufacturer data currently loaded. Always verify current limits, tolerances and suffix definitions with the official source before engineering selection.