SKF Cooper split roller bearings and bearing units

Axial location of bearings Cylindrical roller bearings are normally mounted without any axial locating methods. See below conditions for possible exceptions. Recess mounting For locating split cylindrical roller bearings (designation suffix GR), a shaft recess ( table 5 ) is required if: • the axial load exceeds 0,2 C a for 100 series bearings • the axial load exceeds 0,25 C a for 01E and 02E series bearings • the axial load exceeds 0,5 C a for 01, 02, and 03 series bearings • there is a combination of axial loading and one or more of the following: – impact loads – vertical shaft – fluctuating temperatures over 100 °C ( 210 °F ). Design considerations Table 5 Shaft recess abutment dimensions Bearing bore Abutment diameter Nominal diameter d d a > ≤ mm/ in. mm/ in. – 90 d + 5 – 3 1 / 2 d + 3 / 16 90 155 d + 10 3 1 / 2 6 d + 3 / 8 155 – d + 10 6 – d + 3 / 8 d a d The maximum shaft fillet radius (r) may vary according to bearing series. If larger shaft fillet radii are required, SKF can supply bear- ings with extra large chamfers on the inner ring bore. The tolerance on the width of the recess is provided in table 6 . NOTE: Recess mounting requires a spe- cial cartridge and special seals to accommo- date the larger shaft diameters. For some sizes, a modified inner ring is also required to allow the ring halves to be assembled onto the shaft in a truly radial direction. With standard rings, it is sometimes nec- essary to incline the ring half slightly to the shaft axis in order to get it into position, but this is prevented by the walls of the recess. When recess mounting is required for split cylindrical or tapered roller bearings, contact SKF for advice on the required modifications and part designations. Table 6 Shaft tolerances on recess width and spacing between retaining rings Width Tolerance class Nominal diameter B a D11 > ≤ mm μm – 50 +80 +240 50 80 +100 +290 80 120 +120 +340 120 180 +145 +395 180 250 +170 +460 250 315 +190 +510 315 400 +210 +570 B a Spiral rings Another way to axially support the inner ring could be to utilize spiral rings. Please contact SKF for more information and support. 15 1

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