FAG22218EASKMW33Double-Row Spherical Roller Bearing 90x160x40 mm, Tapered Bore 1:12, Machined Brass Cage, C3 Clearance, Lubrication Groove

Product Description

What this part is

FAG 22218, a double-row spherical roller bearing in the 90 x 160 x 40 mm envelope with a 1:12 tapered bore, a machined brass cage and an annular lubrication groove in the outer ring. Brand: FAG (Schaeffler). Bearing Type: Double-row spherical roller bearing. Bore: 90 mm. Outside Diameter: 160 mm. Overall Width: 40 mm. Bore Form: Tapered 1:12. Cage Material: Machined brass. Cage Type: M, machined, outer-ring centred. Internal Clearance: C3. Closure Type: Open. Number Of Rows: Two. Precision Rating: Normal. Series: 222, 22 dimension series. Base Number: 22218. Design Units: Metric. Rolling Elements: Spherical barrel rollers. Bearing Material: Bearing steel. Unit Quantity: 1 Pc. Harmonization Code: 8482.30.00.80. The FAG-published designation for this execution is 22218-E1A-XL-K-M-C3.

Published ratings

Dynamic Load Rating: 345 kN. Static Load Rating: 375 kN. Fatigue Limit Load Cu: 42.5 kN. Reference Speed: 3,400 rpm. Limiting Speed: 4,800 rpm with the machined brass cage. Item Weight: 3.20 kg (7.05 lb). Calculation Factors: e 0.23, Y1 2.9, Y2 4.31, Y0 2.83. Max Temp: 200 °C. Min Temp: -30 °C.

Decoding the designation

222 / 18: double-row spherical roller bearing, 22 dimension series, 90 mm bore. E1: FAG’s optimised high-capacity internal design. E1A: the same design executed with a machined brass cage. XL: Schaeffler X-life quality grade. K: tapered bore, 1:12. M: machined brass cage, outer-ring centred. C3: radial internal clearance greater than normal. W33: annular lubrication groove with feed holes in the outer ring. Searchable variants of the marked number: 22218EASKMW33, 22218-EAS-K-M-W33, 22218 EAS K M W33, 22218KMW33, 22218KM, 22218K, 22218.

What these specs mean in practice

A machined brass cage tolerates higher temperature than steel or polymer and resists the shock and vibration that fatigue a pressed-steel cage in crushers and vibrating screens. It is forgiving in sliding contact against steel, so it holds up under marginal or contaminated lubrication. It is heavier, costs more, and runs a slightly lower limiting speed than a steel cage.

C3 clearance pairs with a tapered bore. Driving a bearing up an adapter sleeve consumes internal clearance as the inner ring expands, and a hot inner ring in a cooler housing consumes more in service. The extra clearance of the C3 class is what leaves a working residual once both effects have been absorbed.

Mounting and bore form

Locking Method: adapter sleeve with nut and lockwasher, or a machined tapered shaft seat. The tapered bore mounts on a matching machined taper, or on an adapter sleeve that provides the taper and clamps to a plain cylindrical shaft. Relubrication: the W33 annular groove and its feed holes carry lubricant from the housing feed port directly to the rollers.

Interchange guidance

The 22218 base number and the 90 x 160 x 40 mm envelope are ISO standard, so tapered-bore equivalents exist across makers: SKF 22218 EK/C3, NSK 22218EAKE4C3, NTN 22218EAKD1, Timken 22218EKJW33. Internal design codes are maker-specific: FAG E1-XL and E1A-XL, SKF E, NSK EA and NTN EA each denote that maker’s own roller complement, cage material and ratings, so cage material and clearance class match alongside the envelope. The straight-bore 22218 shares the envelope and the ratings and mounts on a plain cylindrical shaft seat.