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Q1— Section header —
1.1When working with bearings cleanliness is of the utmost importance because even the slightest contamination of bearing will reduce its life span. (1\
1.2Switch off the main circuit breaker that feeds the machine. Switch off the isolator to the machine and lock it down with a lock out device and keep the key away. Place a sign at a point of isolation informing everyone about the
1.3Bear ing removal with a screw puller Bearing removal with a hydraulic puller Bearin g removal with an impact puller The initial cost is high They require a larger space to work in They a
Q2— Section header —
2.1Self aligning couplings
2.2Check that the hub bore and shaft are clean and free of any burrs. Measure and document the bore of each hub and the diameter of each shaft. Check that the keyways on the machine and the driver are completely filled.
2.3Excess vibration on the machine. Signs of wear or looseness in fasteners. Using the incorrect coupling for the application. Incorrect or inadequate lubrication. Excessive build up of dirt in the coupling that may prevent it from adjusting
Q3— Section header —
3.1A brake system is used to stop or hold motion whereas a coupling is used to connect two shafts together so that they can transmit motion. (2\
3.2In a thruster brake, a braking force is applied to the brake shoes by a spring. to slow the machine down and finally stop it . The releas of the brake drum and the compressi of the spring is done by the thruster
Q4— Section header —
4.1It should have grills or vents for good ventilation. It should have an inspection door or panels or provide some form of access. It should be easy to remove and replace if damaged. Where necessary, it should protect the drive from
4.2To clear obstructions. Duplex chain
4.4The chances of accidents are less. There is less risk of damage to the machine, or dirt contaminating parts of the machine. The bearing in which the shafts rotate can also be a source of problem that result in wear.
Q5— Section header —
5.1.1Coupling and sockets are the usual way to connect two pieces of pipe of similar material.
5.1.2Bends and elbows are used to change the direction of pipe.
5.1.3
5.2The flange face is not flat Poor finish of flange mating surface Bolt and nut s not torqued to correct tightness Excessive noise Whipping or increase in temperature
Q6— Section header —
6.1.5
6.2The advantage of using brazed tip tool is that once blunt, they can be sharpened and re sharpened again and again. (2\
6.3STEP 1: STEP 2: STEP STEP 4: STEP 5: Using handles, advance the tool until it touches the face and make a very fine cut on the workpiece. Withdraw the tool by using the
6.4.1GO and NO GO gauge can be used to measure the size of a tapered hole.
6.4.2
6.6This helps to establish whether danger ha been identified and safety precautions and controls are effective. It also helps to prevent or control many situations or activities that could have an adverse effect on production and quality.
Q7— Section header —
7.1Do not work on dirty or wet floors. Stand on the wooden or rubber duckboards and not on the concrete floor.
7.2Ind ex handle Crank handle Sector arm Chuck Rapid index plate Rapid index pin Rapid index lever Do this while holding the workpiece up to a light source