INAPWTR1747-2RSYoke Type Track Roller – 17 mm Bore, 47 mm OD, Full Complement Cylindrical Rollers, Sealed Both Sides

Product Description

What this part is

INA PWTR1747-2RS yoke type track roller. Bore: 17 mm. Outside Diameter: 47 mm. Overall Width: 21 mm. Inner Ring Width: 20 mm. Rolling Elements: Cylindrical rollers, full complement. Inner Ring: Included. Closure Type: Lip seals on both sides. Axial Guidance: Integral thrust washers. Bearing Material: Chrome steel. Dynamic Load Rating: 15.9 kN. Static Load Rating: 18.4 kN. Series: PWTR. Base Number: PWTR1747. Design Units: Metric. Unit Quantity: 1 Pc.

Decoding the designation

PWTR — yoke type track roller with an inner ring, a full complement cylindrical roller set and integral axial guidance.

17 — bore diameter, 17 mm.

47 — outside diameter, 47 mm.

2RS — lip seals on both sides.

What these specs mean in practice

A yoke type track roller is a thick-walled outer ring designed to run directly on a track, cam plate or guide rail, so the outer ring is the running surface and carries the Hertzian contact stress that a normal bearing outer ring never sees. Rolling Elements: full complement cylindrical rollers. Leaving the cage out packs the maximum number of rollers into the space, which is why the static rating stands above the dynamic rating on this type: Static Load Rating: 18.4 kN against a Dynamic Load Rating: 15.9 kN. Track rollers spend much of their life oscillating or slow-rolling under high contact load rather than turning continuously, so static capacity is the figure that usually governs selection. The integral axial guidance takes side load from the roller against the yoke without a separate thrust washer stack. Lip seals on both sides retain the factory grease charge and keep swarf and coolant out of the roller set.

Mounting data

Bore: 17 mm, straight, for a clevis pin or yoke pin in a fork mount. Overall Width: 21 mm across the outer ring; Inner Ring Width: 20 mm, so the inner ring sits proud of the outer ring faces and clamps between the yoke arms while the outer ring turns free of them. That 1 mm offset is what lets the yoke be tightened solidly without gripping the running outer ring. The outer ring runs directly on the track surface, and track hardness governs the achievable load: a hardened and ground steel track is the standard counterface.

Quantity and configuration

Unit Quantity: 1 Pc. Complete roller: inner ring, full complement roller set, outer ring, axial guidance washers and both lip seals, greased and sealed for life.

Interchange guidance

The PWTR designation is INA’s own, and the 17 x 47 mm yoke roller envelope is shared across the track roller ranges. Cross-References: INA PWTR1747-2RS-XL, INA PWTR1747-2RS-RR-XL, IKO CR, McGill CYR. The PWKR variants on the same size are the stud type with a threaded shank instead of a bore, so they are a related part rather than an interchange. Searchable variants of the manufacturer part number: PWTR17472RS, PWTR-1747-2RS, PWTR1747-2RS, PWTR 1747 2RS, PWTR1747.