APPLICATIONS
Wheel-end procurement by buyer type | Timken
Choose the application that fits your order
Build an axle-and-side map before importing a catalog range. Keep a separate row for each OE cross reference, drivetrain and connector key. When the same part appears under two references, confirm the ABS encoder ring location and hub flange dimensions on the candidate sample before treating the listings as equivalent. For a range with 24 units per side, treat the left and right parts as separate lines until both samples and their labels agree.
For a sample match, identify the supplier SKU and drawing revision, fixture the hub at the drawing datum and use a dial indicator at the specified measurement radius. Have the inspector record the fixture, instrument, units, measured lateral runout and the buyer's acceptance limit.
Group vehicles by axle load and duty cycle. Ask for rim diameter and width, wheel load rating and tire size, load index and speed rating before comparing alternatives. Include seasonal routes, road surface and the destination port.
For highway versus mixed-surface duty, compare rolling resistance data under matched test conditions alongside wet grip, tread depth and expected operating temperature. Record which results the supplier can support for the exact size and construction. A sample RFQ can specify 225/45R18 with load index 95 and a separate speed rating field. Use the rating required by the application, and ask for evidence that covers the offered SKU.
Compare a complete hub unit with a serviceable bearing only where the service documentation allows each option. The assembly quote covers a larger unit and can simplify installation. A bearing-only kit preserves reusable parts if the mating surfaces pass inspection and the shop can follow the specified press or bearing preload procedure.
Ask for bearing bore, outside diameter and width in mm, the seal lip arrangement and a bill of materials covering retaining rings, nuts or other single-use hardware.
Quote against a controlled drawing and list the critical interfaces. For a wheel, include pitch circle diameter (PCD), wheel offset (ET), center bore and bolt seat. For hub assemblies, call out the spline, wheel speed sensor connector and axle position.
Distinguish the sample revision from the intended production revision. Define the sample quantity, the document set, inspection stages and who approves any deviation before a bulk purchase. For example, a 5 × 114.3 mm bolt pattern and ET35 wheel offset still leave center bore, mounting face and load rating to verify.