Tapered Roller Bearing HM218248

Cone-only service for stamped hubs

Timken publishes the HM218248 tapered roller bearing cone as a precision ground inner race for Class 8 wheel ends where the cup remains serviceable. Cones carry the rolling elements and inner raceway; mixing a fresh cone with a worn cup invites spalling and hub noise within weeks. This page sells the cone separately for shops that already validated cup condition.

Wheel-end bearings translate brake torque and vertical load into smooth rotation. Noise that grows with speed, grease thrown past a seal, or ABS tone ring damage often starts with bearing geometry that left spec. The cone stamp is the first comparison point on the bench.

Card price is $64.00 USD before tax. Published weight is 3.8 lb. Ground parcel is typical movement for a single cone carton.

Preload and end play per axle chart

Hub preload is not a gut-feel tighten. Each axle maker publishes end play or torque preload steps for the nut system on your spindle. Follow that chart for the hub generation on the VIN, including whether you use a dial indicator, a nut torquing sequence, or a stamped spacer stack.

Clean races, inspect for brinelling, and replace cups when pitting shows under light. A new cone on a damaged cup saves labor once and costs a comeback twice.

• Pack grease per the axle lubrication specification, not a random tub from the lube bench.
• Seat the cone squarely; never drive inner races with a punch off center.
• Verify ABS exciter ring runout when the hub carries a tone wheel.
• Torque wheel nuts in the star pattern the wheel maker requires after bearing service.

Wheel-end fitment on major OTR makes

The fitment summary centers on Freightliner, Kenworth, and Peterbilt wheel-end applications listed in the table above. Wheel hubs vary by axle vendor, brake chamber mount, and ABS architecture even within one paint brand.

Match the removed cone stamp, hub casting numbers, and VIN axle code before install. We provide compatibility language; technicians confirm fit on the spindle.

Photograph old stamps and send VIN to support@aonetruckauto.com when the failed cone shattered in the hub. Use the contact form for fleet documentation. The fitment guide helps when you are choosing between cone-only and matched sets.

Ordering the Timken cone

When paperwork references Timken HM218248, read the embossing on the removed cone before you add quantity. Cart lines show SKU the cart listing at the unit price on this card.

If the hub specification calls for a matched cup and cone set, consider the NTN set listing on this site rather than mixing unknown cup wear with a new cone.

Shop safety and handling

Bearing races are hardened steel; gloves and eye protection belong in every hub job. Keep cones in factory wrap until the hub is clean and dry.

Do not spin hubs with compressed air to dry them; debris blown into the cavity defeats the point of fresh grease.

Returns and shipping notes

Unused bearings may return under the window on returns and refunds if packaging stays intact. Installed cones are consumable once grease touches the raceway.

Hub noise diagnostics before teardown

Road tests that isolate hub noise from tire chop or driveline balance save hours. Swapping a suspect tire side to side, then listening on a smooth lane at steady speed, tells you whether the growl moves with the wheel.

ABS sensors can throw false codes when tone rings wobble from bearing play. Scan for wheel-speed faults after bearing service and clear codes only after a rolling test confirms clean signals.

Grease color tells a story: chocolate milk means water, metallic glitter means spalling. Do not repack over contaminated grease hoping the new cone fixes chemistry.

Fleet PM pairing with seals and drums

Cones often arrive when seals were leaking long enough to wash grease from the cavity. Replace seals whenever you see trail lines on the spindle or inside the drum.

Brake drum pilot runout can mimic bearing wobble. Measure or swap drums when vibration persists after a careful bearing job.

Document torque on wheel nuts and recheck after the first fifty miles when your fleet policy requires it. Loose nuts destroy fresh bearings faster than poor preload.

Commercial ordering context

At $64.00 per cone, stocking one spare per common hub family is cheaper than an emergency freight bill on a loaded trailer. Keep cones in original wrap until the hub is ready; dust on a raceway is a comeback.

PayPal totals reflect quantity times unit price with capture confirmation on success. That payment step does not approve fit; stamps still rule the bench decision.

Technician sign-off before road release

After preload is set, rotate the hub by hand listening for tick or grind. Reinstall brakes and verify drag is even before the first roll. A hot hub after five miles means you revisit preload or a pinched seal lip.

Document bearing stamp pairs on invoices so warranty discussions reference the exact component installed. Photos of race seating help when a supplier asks whether install procedure was followed.

Record hub temperature at the end of a thirty-minute loaded cruise when your fleet uses infrared checks; a side that runs hotter than its mate often still has preload or brake drag issues worth revisiting before the driver leaves the yard.

Delivery methods and packaging notes live on the shipping policy. Unused-item rules are under returns and refunds. Reach us at support@aonetruckauto.com or the contact form.

A-One Truck Auto is operated by HEAVY TRUCK PARTS, INC. Manufacturer names indicate fitment language only.