342A Bearing Dimensions
342A inch tapered roller bearing cone, paired with the 332 cup: 41.275 mm (1.625 in) bore, 80 mm OD, 28.575 mm width (FULI catalog). Quote.
342A specifications
| Cone bore d | 41.275 mm (1.625 in) |
|---|---|
| Cone width B | 29.977 mm |
| Matching cup | 332 |
| Cup outside diameter D | 80 mm (3.150 in) |
| Total width T | 28.575 mm (1.125 in) — assembled width of cup and cone |
| Seal / shield options | Open (cup and cone, no seals) |
| Material | GCr15 chrome bearing steel (rings and rolling elements) |
| Radial clearance | Set during mounting (adjustable, not a C-class value) |
| Load ratings | See the cone and cup pairs table below |
342A cone and cup pairs
| Cone | Cup | Bore d | OD D | Width T | Cr (kN) | C0r (kN) |
|---|---|---|---|---|---|---|
| 342A | 332 | 41.275 mm (1.625 in) | 80 mm (3.150 in) | 28.575 mm (1.125 in) | 69.6 | 77.5 |
Dimensions from FULI's catalog. A cone (inner ring with rollers and cage) and a cup (outer ring) make up one bearing; the pairs above are the matching numbers listed in FULI's catalog. Values from FULI's catalog; confirm for your application.
How to read the 342A designation
| Segment | Meaning |
|---|---|
| 342A | Designation breakdown not available for this model. |
342A interchange
342A is an inch tapered roller bearing cone. Inch tapered roller bearings are ordered by cone number and cup number. Most makers use the same cone and cup numbers for the same size, but always check the cup number as well. Send us the numbers on your old bearing and we confirm the match before quoting.
Brand names are trademarks of their respective owners. FULI is not affiliated with, authorized by or endorsed by these companies. Part numbers are shown for interchange reference only. FULI dimensions, load ratings and speeds come from the FULI catalog.
342A compared with nearby cone sizes
The 342A cone has a 41.275 mm (1.625 in) bore and a cone width of 29.977 mm. FULI's catalog pairs it with cup 332 (80 mm outside diameter, 28.575 mm total width).
The next smaller cone on this site is U399, with a 39.688 mm bore (1.59 mm smaller) and cup U360L.
The next larger is 3877, with a 41.275 mm bore (0 mm larger) and cup 3820.
The metric tapered bearing on this site closest in bore is 32008 (40 × 68 × 19 mm). Its sizes differ from the 342A pair, so the two are not interchangeable; it is given only as a size reference.
| Cone | Cup | d × D × T | Cr (kN) |
|---|---|---|---|
| LM29748 | LM29710 | 38.1 × 65.088 × 18.034 mm | 43.4 |
| LM29749 | LM29711 | 38.1 × 65.088 × 19.812 mm | 43.2 |
| U399 | U360L | 39.688 × 73.025 × 19.395 mm | 55.1 |
| 342A | 332 | 41.275 × 80 × 28.575 mm | 69.6 |
| 3877 | 3820 | 41.275 × 85.725 × 30.162 mm | 105.1 |
| LM501349 | LM501310 | 41.275 × 73.431 × 19.558 mm | 56.1 |
| 25580 | 25520 | 44.45 × 82.931 × 23.8 mm | — |
Sizes and Cr from FULI's catalog; — = not listed on this site.
342A load ratings
342A/332 has a dynamic load rating Cr of 69.6 kN and a static rating C0r of 77.5 kN in FULI's catalog. The ratings belong to the cone and cup as a pair; a different cup changes them.
Speed limits and weights for inch cones are not listed in the catalog; ask us and we send them with the quotation.
Values from FULI's catalog; confirm for your application.
342A size in inches and millimetres
342A is made to inch sizes. The 41.275 mm bore is 1-5/8 in. The millimetre values in the catalog are conversions of the inch sizes.
| Dimension | Millimetres | Inches |
|---|---|---|
| Cone bore d | 41.275 mm | 1.6250 in |
| Cup outside diameter D (332) | 80 mm | 3.1496 in |
| Total width T | 28.575 mm | 1.1250 in |
| Cone width B | 29.977 mm | 1.1802 in |
| Cup width C | 17.826 mm | 0.7018 in |
Converted at 1 in = 25.4 mm and rounded to four decimals.
Mounting 342A (general guidance)
General guidance, not a FULI specification: on a turning shaft the cone is a tight fit on the shaft and the cup a lighter fit in the housing, so the cup can be moved when the bearing pair is adjusted. Inch bearing fits are given as shaft and housing limits in inches in the bearing makers' tables; follow the drawing of your machine.
Tapered roller bearings carry radial load and axial load in one direction, so 342A is normally used as one of a pair, and the end play or preload is set at mounting.
If the outer ring turns and the shaft stands still, as in an idler pulley or a wheel hub, the fits are reversed: the housing gets the interference fit (for example N7 or P7) and the shaft a sliding one (g6 or h6).
Grease for 342A
FULI supplies tapered roller bearings rust-protected and normally without grease; grease is packed in when the bearing is mounted. Relubricating 342A/332 from the side takes about 11.4 g each time by the formula in our grease calculator: 0.005 × D × T = 0.005 × 80 × 28.57.
How FULI supplies 342A
342A is supplied as a cone, as a cup or as a complete cone and cup pair, as your order states. Where an order states a requirement for the total width T (28.575 mm for 342A/332), each set is checked on a height gauge before packing.
Rings are marked with a brand you are authorised to use, with the FULI brand, or left neutral, as your order states. The box is printed with the model, precision class and brand.
Inquiries that give only one number are the usual cause of a wrong quote, so write both the cone and the cup number, for example 342A/332.
Tools and guides for 342A
Typical applications
- Vehicle wheel hubs and axles
- Gearboxes and reducers
- Agricultural machinery
- Conveyor pulleys
FAQ
What size is 342A in mm?
The 342A cone has a 41.275 mm bore (1.625 in). With cup 332 the bearing is 41.275 × 80 × 28.575 mm (d × D × T).
What is the difference between 342A and 3877?
3877 has a 41.275 mm bore against 41.275 mm for 342A, and pairs with cup 3820 (41.275 × 85.725 × 30.162 mm) instead of 332 (41.275 × 80 × 28.575 mm). The two are not interchangeable; order by the numbers on the old cone and cup.
How much grease does 342A/332 need?
About 11.4 g each time it is relubricated from the side (0.005 × 80 × 28.57). FULI ships it rust-protected without grease, so the first fill is made at mounting.
Which cup goes with the 342A cone?
FULI's catalog pairs the 342A cone with cup 332. Tell us whether you need the cone, the cup or both when you send the inquiry.
Is 342A the same size across brands?
342A is an inch tapered roller bearing cone number. Most makers use the same cone and cup numbers for the same size, but check the cup number too. Send us the numbers on your old bearing and we confirm the match.