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It is sometimes impossible even when working in a workshop, to remove a bearing with a press because of the size or shape of the machine. In such case a ________________ to remove the bearing.CorrectIncorrect
__________are made with three or two legs fitted to a body and come in various sizesCorrectIncorrect
The _______ on most of the pullers are interchangeable or extendable to allow the jaws to fit over or inside the bearingCorrectIncorrect
Force is exerted on the bearing through the body by means of ____________________.CorrectIncorrect
One way of mounting bearings, especially the larger sizes, is to expand them by _____________ before mountingCorrectIncorrect
•Screw pullers have ________in the body and on the spindle
•By screwing the spindle into the body, the spindle will push against the shaft and create a _______that will make the legs pull the bearing off.
•Screw pullers are suitable for most ____________.CorrectIncorrect
•An impact puller is simply a puller body that has a shaft with a stop at one end and with a _________mass fitted in between
•By sliding the mass towards the stop at speed, force is applied on the _________every time on impact.
•Impact pullers are only suitable for small bearings i.e. up to an inside diameter of __________.CorrectIncorrect
•Instead of opposing forces being exerted on the shaft and bearing by screwing the spindle of a screw puller into its body, force is exerted by pumping hydraulic oil from a _________, to extend a piston/ram to remove the bearing.
•The power pack must be used in conjunction with a pulling attachment and strong back. Hydraulic pullers are used when a large _________is required.CorrectIncorrect
•Where there is insufficient space behind the bearing for you to hook the jaws directly onto the bearing, an ________is used.
•Open the attachment wide enough to pass over the _______if the bolts are long enough to allow it or split the attachment by removing the two bolts.
•Reassemble the two halves of the attachment behind the bearing and screw up the nuts until the two halves will_______the bearing evenly.
•Hook the jaws of a two-leg puller over the bolts or use a strong back with two long bolts screwed into the __________.CorrectIncorrect
Induction heating and mounting
Sealed bearings must be heated in oil and not with an induction heaterCorrectIncorrect
The bearing is fitted over the removable laminated (layered) yoke of the induction heater.CorrectIncorrect
When the bearing and the removable yoke are in place and the heater is switched on, current flows through the yoke, which in turn induces a low voltage and a high current into the bearingCorrectIncorrect
The bearing which actually forms a short circuit, is then heatedCorrectIncorrect
Never clean the shaft with emery tapeCorrectIncorrect
Remove any burrs from the shaft with a hammer and chisel.CorrectIncorrect
Measure the diameter of the bearing journal on the shaft with a micrometerCorrectIncorrect
Set a telescopic gauge to the size of the journalCorrectIncorrect
Select the smallest yoke that will fit the inside diameter of the bearing to improve heating efficiency and so reduce the heating time.CorrectIncorrect
Mount the bearing on the induction heater. Switch the induction heater on and check the temperature of the bearing frequently with a thermometer. Be sure that the bearing is heated above 100°C.CorrectIncorrect
Remove the bearing from the induction heater after about five minutes and check the expansion in the bore with the telescopic gauge. Do this quickly before the bearing gets a chance to cool down.CorrectIncorrect
Wear rubber gloves or use an asbestos cloth to handle the hot bearing.CorrectIncorrect
Heat the bearing for about another minute after the telescopic gauge is found to fit into the bore.CorrectIncorrect
Remove the bearing from the heater and slide it over the shaft.CorrectIncorrect
Hold the bearing in place against the shoulder until it has cooled down enough to shrink on. Water can be used to cool the bearing down faster.CorrectIncorrect
Try to insert a 0,05 mm feeler between the bearing and the shoulder after the parts have cooled to ensure that the bearing is fully seatedCorrectIncorrect