Cutlass Bearings for a 2-1/2" Shaft
We list 15 Exalto cutlass bearings for a 2-1/2" (63.5 mm) propeller shaft, in phenolic, brass and GRP. They fit five housing bores from 3" (76.2 mm) to 3-1/2" (88.9 mm), and every one is 10" (254 mm) long. The nominal wall thickness, half the difference between housing bore and shaft, runs from 6.35 mm to 12.7 mm.
Of these, eight are in Australian stock (five phenolic and three GRP), with same-day dispatch on orders placed by 2pm AEST on a business day. You can pre-order the other seven, with dispatch estimated at 3 to 4 weeks. Prices run from $450.00 to $925.00 including GST, and Express Post delivery within Australia is free.
A 65 mm (2.559") shaft is only 1.5 mm larger, but its bearings are a different nominal size and are not interchangeable with these. Check which unit your shaft was made to before ordering, or see the bearings for a 65 mm shaft.
15 bearings for a 2-1/2" shaft
| Code | Housing bore | Length | Material | Availability | Price inc GST | Order |
|---|---|---|---|---|---|---|
IPSF20-2 |
3" 76.2 mm | 10" 254 mm | Phenolic | Dispatch in 3 to 4 weeks | $450.00 | |
IBSF20-2 |
3" 76.2 mm | 10" 254 mm | Brass | Dispatch in 3 to 4 weeks | $925.00 | |
IGSF20-2 |
3" 76.2 mm | 10" 254 mm | GRP | In stock | $525.00 | |
IPSF20-1 |
3-1/8" 79.38 mm | 10" 254 mm | Phenolic | In stock | $450.00 | |
IBSF20-1 |
3-1/8" 79.38 mm | 10" 254 mm | Brass | Dispatch in 3 to 4 weeks | $900.00 | |
IGSF20-1 |
3-1/8" 79.38 mm | 10" 254 mm | GRP | Dispatch in 3 to 4 weeks | $525.00 | |
IPSF20 |
3-1/4" 82.55 mm | 10" 254 mm | Phenolic | In stock | $450.00 | |
IBSF20 |
3-1/4" 82.55 mm | 10" 254 mm | Brass | Dispatch in 3 to 4 weeks | $825.00 | |
IGSF20 |
3-1/4" 82.55 mm | 10" 254 mm | GRP | Dispatch in 3 to 4 weeks | $525.00 | |
IPSF20+1 |
3-3/8" 85.73 mm | 10" 254 mm | Phenolic | In stock (1) | $450.00 | |
IPSF20-3 |
3-3/8" 85.73 mm | 10" 254 mm | Phenolic | In stock | $450.00 | |
IBSF20+1 |
3-3/8" 85.73 mm | 10" 254 mm | Brass | Dispatch in 3 to 4 weeks | $900.00 | |
IGSF20+1 |
3-3/8" 85.73 mm | 10" 254 mm | GRP | In stock | $525.00 | |
IPSF20+2 |
3-1/2" 88.9 mm | 10" 254 mm | Phenolic | In stock | $450.00 | |
IGSF20+2 |
3-1/2" 88.9 mm | 10" 254 mm | GRP | In stock | $525.00 |
How to choose a bearing for a 2-1/2" shaft
Measure the housing bore and the length of the bearing you are replacing, then find that combination below. Bearings that share a housing bore and length differ in shell material, tolerances and availability.
- 3" (76.2 mm) housing, 10" (254 mm) long: phenolic IPSF20-2 (dispatch in 3 to 4 weeks, $450.00), brass IBSF20-2 (dispatch in 3 to 4 weeks, $925.00), GRP IGSF20-2 (in stock, $525.00)
- 3-1/8" (79.38 mm) housing, 10" (254 mm) long: phenolic IPSF20-1 (in stock, $450.00), brass IBSF20-1 (dispatch in 3 to 4 weeks, $900.00), GRP IGSF20-1 (dispatch in 3 to 4 weeks, $525.00)
- 3-1/4" (82.55 mm) housing, 10" (254 mm) long: phenolic IPSF20 (in stock, $450.00), brass IBSF20 (dispatch in 3 to 4 weeks, $825.00), GRP IGSF20 (dispatch in 3 to 4 weeks, $525.00)
- 3-3/8" (85.73 mm) housing, 10" (254 mm) long: phenolic IPSF20+1 (in stock, $450.00), phenolic IPSF20-3 (in stock, $450.00), brass IBSF20+1 (dispatch in 3 to 4 weeks, $900.00), GRP IGSF20+1 (in stock, $525.00)
- 3-1/2" (88.9 mm) housing, 10" (254 mm) long: phenolic IPSF20+2 (in stock, $450.00), GRP IGSF20+2 (in stock, $525.00)
Phenolic, brass and GRP describe the outer shell, and each has a grooved nitrile rubber lining. The non-metallic phenolic shell avoids galvanic corrosion between the shell and a metal housing. Exalto advises against fitting brass directly into steel or aluminium housings. Exalto identifies GRP as suitable for steel and aluminium stern tubes as well as compatible non-metallic housings. More about each: phenolic cutlass bearings, brass cutlass bearings and GRP cutlass bearings.
Matching sizes is the first check, not the last: confirm the shell material, the housing's condition and the retention method for your boat. The measuring guide explains what to record, or contact us with your measurements.