INAStud Type Track Roller Cam Follower — 19 mm Outer Ring Diameter, 11 mm Width, M8x1.25 Stud, Crowned Outer Ring, Sealed Both Sides

Product Description

What this part is: INA KR19-PP-AE, a stud type track roller, commonly called a cam follower. Outer Ring Diameter: 19 mm. Roller Width: 11 mm. Stud Diameter: 8 mm. Thread: M8x1.25. Outer Ring Profile: crowned. Rolling Elements: cage-guided needle rollers. Closure Type: sealed both sides. Dynamic Load Rating: 3,550 N. Static Load Rating: 4,100 N. Fatigue Limit Load: 560 N. Limiting Speed: 11,000 rpm on permanent grease. Schaeffler material number: 005545382. Country of origin as marked: Germany. Decoding the designation: KR — stud type track roller: a thick-walled outer ring running on needle rollers around an integral threaded stud, so the whole assembly bolts through a single tapped hole or clearance hole. 19 — the outer ring outside diameter in millimetres. PP — three-stage sealing by a plastic axial plain washer on each side. What these specs mean in practice: Dynamic Load Rating: 3,550 N. Static Load Rating: 4,100 N. Fatigue Limit Load: 560 N. Limiting Speed: 11,000 rpm on permanent grease. Outer Ring Profile: crowned, so the contact patch stays in the middle of the tread and the roller keeps running true when the track and the stud axis are not perfectly parallel — the reason a crowned roller survives a fabricated cam track that a cylindrical one would edge-load. The thick outer ring takes the direct rolling contact against the cam or rail, so the part is both the bearing and the wear surface. Cage-guided needle rollers rather than a full complement give the higher speed rating. Closure Type: sealed both sides, greased for life. Mounting data: Stud Diameter: 8 mm. Thread: M8x1.25 on the stud end. Roller Width: 11 mm. Outer Ring Diameter: 19 mm. The stud passes through the mounting plate and is drawn up by a nut on the M8 thread; the stud end face carries a hexagon socket so the roller can be held while the nut is torqued. Quantity and configuration: Unit Quantity: 1 Pc. Supplied as a complete stud-and-roller assembly. Interchange guidance: Manufacturer part number variants: KR19-PP-AE, KR19PPAE, KR 19 PP AE, KR19-PP, KR19PP, Schaeffler material number 005545382. Related executions on the same 19 mm envelope: KR19-PP-A is the crowned sealed roller, KR19-X-PP carries a cylindrical outer ring, and KR19-SK-PP-A adds a hexagon socket variant. An IKO CF6VBUUR and McGill CF 3/4 SB occupy the same duty in the same size class.