TimkenM241510Tapered Roller Bearing Cup, 11.500 in OD x 1.8125 in Wide, M241500 Inch Series Outer Ring Only

Product Description

What this part is

This is a tapered roller bearing cup — the outer ring on its own, with the tapered raceway ground into its bore. It is the M241510 cup from Timken’s M241500 inch series, measuring 11.500 in (292.100 mm) outside diameter by 1.8125 in (46.038 mm) wide. A cup is one half of a tapered roller bearing; the other half is the cone assembly, which carries the inner ring, the rollers and the cage.

What is and is not included

This listing is the cup alone. There is no cone, no roller set and no cage. Tapered roller bearings are sold as separable components precisely because cups and cones wear at different rates and are pressed into different members — the cup into the housing, the cone onto the shaft — so replacing one without the other is normal practice. If you need a complete bearing you also need an M241547 cone (or one of its variants), which is not part of this listing.

Decoding the designation

M241510 — Timken inch-series cup number. In Timken’s inch numbering the cup and cone are separately numbered within a common series; the M241500 series pairs the M241510 cup with M241542, M241543 and M241547 cones.The cone number selects the bore. An M241547 cone gives an 8.000 in (203.2 mm) shaft bore; M241542 and M241543 cones give 7.875 in.30-0295 — a distributor and OEM stock number carried on this part; retained as a cross-reference for buyers searching that number.

Published ratings and mounting data

Ratings below are Timken’s own published figures for the complete M241547 / M241510 single-row assembly. They describe the bearing as a pair, not the cup in isolation — a cup has no rating of its own because capacity is a function of the roller set running between both races.

Cup outside diameter (D): 11.5000 in / 292.100 mmCup width (C): 1.8125 in / 46.038 mmAssembly width (T), with M241547 cone: 2.2813 in / 57.945 mmCone bore (d), with M241547 cone: 8.0000 in / 203.2 mmDynamic radial load rating C1 (1 million revolutions, ISO): 135,000 lbf / 600,000 NDynamic radial load rating C90 (90 million revolutions, Timken method): 35,000 lbf / 156,000 NDynamic axial rating Ca90: 19,900 lbf / 88,500 NStatic radial load rating C0: 263,000 lbf / 1,170,000 Ne factor 0.33, K factor 1.76, Y factor 1.8Housing backing shoulder diameter, frontface (Da): 11.02 in / 278.90 mmHousing backing shoulder diameter, backface (Db): 10.71 in / 272.03 mmMaximum housing fillet radius cleared: 0.130 in / 3.30 mmCage location relative to frontface (Ab): 0.12 in / 3 mmAssembly weight (cone plus cup): 26.600 lb / 12.100 kg

Correcting the source data

Distributor listings for this series circulate an outside diameter of 11.875 in / 301.625 mm. Timken’s own catalogue entry for M241547 / M241510 gives the cup outside diameter as 11.5000 in / 292.100 mm, which is also what the 11-1/2 in figure on this part’s own paperwork says. The 11.875 in figure is a mirror error and should not be used to size a housing bore.

What these specs mean in practice

The K factor of 1.76 is the number that tells you what this bearing is for. K is the ratio of radial to thrust capability set by the cup angle: a high K means a shallow cup angle, a bearing that is radially strong and comparatively thrust-weak. At 1.76 the M241500 series sits at the radial-duty end of the tapered roller range, which is why it turns up in heavy off-highway wheel and final-drive positions, large gearbox shafts and mill equipment rather than in gear sets that generate heavy axial thrust.

The e factor of 0.33 is the threshold used in the equivalent-load calculation: below an axial-to-radial load ratio of 0.33 the thrust component is ignored, above it the load equation changes. If you are running a life calculation on this bearing, e and K are the two figures you need and both are published above.

Fitting notes

The cup presses into the housing bore, and the 0.130 in maximum housing fillet radius must be respected at the shoulder or the cup will not seat square. Drive the cup in from the large end of the taper, square to the bore, using a fitting tool that bears on the cup face rather than the raceway — a hammer blow on a raceway will brinell it and the bearing will be noisy from the first hour of service.

A tapered roller bearing has no built-in internal clearance: the operating clearance or preload is set at assembly by how far the cone is drawn up against the cup. That setting is the single largest determinant of bearing life in this product class. If you are replacing a cup only and reusing the existing cone, re-set the endplay to the machine builder’s specification rather than assuming the old setting still applies, because a new cup has an unworn raceway and will change the stack-up.

Interchange guidance

The M241510 cup number is an industry-standard inch designation and is produced by several manufacturers, so an M241510 from another maker is dimensionally interchangeable. Cross-references: M241510, M-241510, M 241510, 30-0295. Mating cones: M241547 (8.000 in bore), M241542 and M241543 (7.875 in bore). Related assemblies using this cup include the M241547 / M241510 single row and the M241547 / M241510CD double-cup arrangements.

Central Surplus also stocks Caterpillar 240-8240 tapered roller bearing cones and cup-and-cone sets in a comparable large-bore size class; if you are rebuilding a heavy final drive it is worth checking both.