SKF Cooper split roller bearings and bearing units

Fig. 25 Cartridge and outer ring sub assembly Mounting 5 Cartridge and outer ring sub assembly See fig. 25 for a schematic illustration of side rods (A), side screws (B), radial screws (C) and joint screws (D). • Place the outer ring half with the lubrica- tion hole into the top half of the cartridge and the other outer ring half into the lower half of the cartridge. • Make sure the ends of the outer ring pro- trude from the cartridge joint face by equal amounts. For cylindrical roller bearings : • For locating bearings and cartridges with outer rings having integral flanges: – Axially clamp all outer rings with an integral flange with side screws (B). – Place the radial joint screws (D) (where fitted, complete with washers) into the corresponding outer ring holes, but do not tighten. – Put the two cartridge halves together, complete with outer rings, and fully tighten the joint screws (D). – Put the side rods (A) (where fitted) and screws (B) in position. – Progressively and fully tighten the side screws (B) and radial screws (C) (where fitted). • For non-locating bearings: – Place the radial screws (C) (where fitted, complete with washers) into the corre- sponding outer ring holes, but do not tighten. – Place the two cartridge halves together, complete with outer rings, and fully tighten the joint screws (D). – Fully tighten the radial screws (C). For tapered roller bearings : • Before putting the two halves of the car- tridge together, fit side rods (A) and side screws (B) and tighten very lightly. • Place together the two halves for the car- tridge complete with outer ring halves and fully tighten joint screws (C and D). • Progressively and fully tighten side screws (B). • Inject grease to fill the grease passages. Remove joint screws (C and D) and sepa- rate cartridge halves, taking care that the outer ring halves do not fall out of position in their respective half-cartridges. 6 Install the seals • Felt seals: – Soak the seals in hot oil. – Fit the seals into the cartridges. • Grease groove seals: – Lubricate the cartridge end bores (machined with a series of small grooves with grease. • Labyrinth seals ( fig. 26 ): – Separate the seal halves by driving out the two jointing pins. – Lubricate the O-rings in the bore with grease. – Reassemble the seal on the shaft by compressing the O-rings of both halves sufficiently to allow the jointing pins to be reinserted. – Tighten the pins. (The seals are able to slide along the shaft once assembled.) • High temperature packing seals: – Place the seals into the cartridge end bores and lubricate. • Synthetic rubber single lip seals: – Place the seals into the cartridge end bores and lubricate. • Spring loaded single lip seals with retain- ing plate: – Note: These seals are assembled after closing the cartridge (Step 8). – For each seal, remove the spring from the lip of its seal by twisting it in the appropriate direction at the joint. – Place the seal around the shaft with its lip pointing outwards and the joint of the seal at the top position. – Place the spring round the shaft, hold one end firmly and twist the other end round three or four times in the oppo- site direction to which it was twisted to release the spring. – Place the two ends of the spring together. Slowly let the twisted end unwind joining the two ends and fully twist the two ends of the spring together. – Place the spring over the lip of the seal so that it sits in its groove. – Grease the shaft where the seal will run and then push the seal along the shaft until it is fully positioned in the seal groove in the end of the cartridge. – Apply further lubricant to the seal lip. – Screw the seal retaining plate to the end face of the cartridge. A B C D Fig. 26 Installing the seals 51 1