How to replace the bearing of the built in spindle of the lathe

Haven't touched this model.

As a general practice, if there is a bearing that is difficult to disassemble, the factory provides a corresponding special disassembly tool. However, that place is generally within the scope of factory overhaul, and there is no need to provide users with any tools.

I don't know what kind of construction this bearing is made of (ball-of?). Hydrostatically pressed? I don't know how it's installed. It's not clear what tools are needed. Generally, it can be removed with tools such as 3-jaw pullers and hydraulic jacks.

Some high-precision bearings are hydraulically mounted, and they are easy to remove when disassembled.

The problem to pay attention to is not to damage the spindle during the disassembly and assembly process. When disassembling and assembling strongly, it is necessary to put more low-viscosity lubricating oil, and the penetrant can be properly heated and used. The force of the puller and the jack should be centered and not skewed.

Hammer striking is strictly forbidden (with a rubber mace).

When the main bearing is positioned, special care should be taken to preload the problem, too large the bearing is easy to damage, too small machine tool accuracy is lost, this generally has a structure that can be fine-tuned.

However, I think that the fact that you asked such a question shows that you don't have much experience, and it is easy to break when disassembling and assembling, so let's find some experts to get this.

1. Remove the screws connected to the flange of the motor.

2. Remove the motor of the spindle.

3. Remove the screws of the cover and remove the upper shell.

4. Remove the screw seat screws.

5. Remove the connecting screws between the nut support and the main sleeve.

6. Remove the spindle parts and remove the flanges at the front end of the spindle parts.

7. Remove the spindle sleeve and remove the round nut.

Summary. Pro, 1 Adjust the gasket method: fill a group of soft material (mild steel sheet or elastic paper) gasket between the bearing end cover and the end face of the bearing seat; When adjusting, first install the bearing end cover without putting the gasket, tighten the screws on the bearing end cover evenly on one side, and rotate the shaft by hand on the other side until the bearing rolling element is in contact with the outer ring and there is no clearance inside the shaft; At this time, the clearance between the bearing end cover and the end face of the bearing seat is measured, plus the axial clearance required by the bearing in normal operation; This is the total thickness of the gasket that needs to be placed, then the prepared spacer is placed between the bearing end cap and the housing end face, and finally the screw is tightened.

Pro, 1 Adjust the gasket method: fill a group of soft material (mild steel sheet or elastic paper) gasket between the bearing end cover and the end face of the bearing seat; When adjusting, first install the bearing end cover without putting the gasket, tighten the screws on the bearing end cover evenly on one side, and rotate the shaft by hand on the other side until the bearing rolling element is in contact with the outer ring and there is no clearance inside the shaft; At this time, the clearance between the bearing end cover and the end face of the bearing seat is measured, plus the axial clearance required by the bearing in normal operation; This is the total thickness of the gasket that needs to be placed, then the prepared spacer is placed between the bearing end cap and the housing end face, and finally the screw is tightened.

2. Adjustment bolt method: press the pressure ring on the outer ring of the bearing, and pressurize it with the adjustment bolt; Before pressurizing the adjustment, the pitch of the adjustment bolt should be measured first, and then the adjustment bolt should be slowly tightened until there is no clearance inside the bearing, and then the corresponding rotation angle of the adjustment bolt should be calculated. For example, the pitch is, the clearance required for the normal operation of the bearing, then the rotation angle required to adjust the bolt is 3600; At this time, the adjusting bolt is reversed 360, and the axial clearance obtained by the bearing is fixed, and then it can be fixed with a stop gasket.

Disassembly steps: 1. Remove the screws connected to the flange of the motor.

2. Remove the motor of the spindle.

3. Remove the screws of the cover and remove the upper shell.

4. Remove the screw seat screws.

5. Remove the connecting screws between the nut support and the main sleeve.

6. Remove the spindle parts and remove the flanges at the front end of the spindle parts.

7. Remove the spindle sleeve and remove the round nut.

The principle is as follows:

It is necessary to open the bedside box cover, check the parts of the internal positioning spindle, and disassemble the parts of the axial positioning

After confirming that there is no limit in the axial direction, knock the spindle out with a copper rod from the end of the spindle.

Generally, the bearings will follow. If you have any questions, please continue to ask, satisfied!

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Hello dear, remove the front wheel. Remove the water seal. I use a thin iron rod which I can put in.

Put the tires at an angle of 30 degrees. An iron rod is pierced from the top and hits a bearing underneath. Hold the iron rod firmly to the left or right.

Only then can the lower end of the iron rod be on the inner warp end face of the bearing. Hit the iron rod with a hammer. One side to the left and right to keep the bearing falling in parallel.

Be forceful. Some of the bearings are very tight. 2. Bearing is an important component in contemporary machinery and equipment.

Its main function is to support the mechanical rotating body. Reduces the coefficient of friction during its movement. And ensure its rotation accuracy.

Have a great day.

First, first remove the grab jaw on the broach bar.

Turn the multi-segment switch on the control panel to manual mode, press and hold the release button, and put a wrench of about 8mm into the spindle taper to remove the loose jaws.

2. Remove the sheet metal and cutting cylinder around the headstock.

1. After the sheet metal is removed, you can see the knife cylinder.

2. After the emergency stop, remove the air pipe on the knife cylinder, loosen the screws connected to the knife cylinder and the spindle box with a wrench, and then loosen the screws with springs.

3. After the knife cylinder is removed, we can see the locking gland of a transition plate and the broach bar (remove it), and then push the broach bar out, and the belt pulley can be seen after the transition plate is removed.

3. Loosen the belt on the pulley.

Loosen the fixing bolts on the spindle motor, then loosen the screws on the section of the spindle taper, leave two, don't dismantle them all, and then use the handwheel to shake the z-axis down, put something below to prepare to catch the spindle, and then remove the remaining screws. Basically, the disassembly of the spindle is complete.

1. First of all, disassemble the damaged spindle. Take the top cylinder first, and then unscrew the stacked spring briquette, pay attention to the top wire for fastening in the stacked spring briquette, the top wire should be loosened and then loosen the thread, after taking down the nine pairs of stacked reeds and retaining rings, if you want to remove the spindle core, you have to first take off the pulley and the pulley is pressed with the back nut, first unscrew the hold-down screw on the back nut, and then remove the back nut, so that the pulley can be unloaded and transported down. Finally, to take down the spindle core - including the cylinder and the whole part of the inner and outer coat, this thing needs at least two people, one person to remove the bearing end cover screw, one person to pay attention to protection, with the hand to support the bottom of the spindle cylinder, when the bearing end cover is removed, the spindle core can fall down, then two people at the same time below the spindle core, if the core can not be taken down, you can use the steel rod to gently knock down on the top, and finally take down the spindle core.

2. After the bright beam is ready for basic preparations, and the spindle is dynamically balanced, the spindle can be installed. First of all, the tie rod, push rod, column, bearing, inner jacket, outer sleeve ruler are assembled according to the drawing (there is a gap between the inner sleeve and the outer coat, to rotate with variable bearings), two people support from the bottom of the shell to the top, the other person tightens the bearing end cover, the spindle shaft core will not fall off, and then install the pulley, back nut, retaining ring, nine pairs of stacked shrapnel, stacked spring briquetting, and finally install the compression cylinder, the entire spindle is installed. It should be noted here that if the height of the bearing end cover is inconsistent with the depth of the bearing, the height can be adjusted by the bearing end cap.

At the same time, the lower bearing end cover and the upper bearing hold-down block should be compressed.

Step 1: Use a screwdriver to screw out all the screws at the end of the spindle.

Step 2: Use the pressure plate to quietly press out the bearing pin (especially beware of the coil must not touch, it is easy to be damaged) Step 3: Wash the pressed bearing with gasoline and then dry.

Step 4: Put on a new bearing grease and turn the bearing by hand to allow the grease to fully "absorb".

Step 5: Rebalance the rotor.

Step 6: Press the bearing into it with a pressure plate.

Step 7: Tighten the screws.

Step 8: Turn on the power supply and connect the inverter, slowly drive from low speed to high speed for 1-2 minutes without any problem, and it will be successfully completed!

Presses. The column can be better protected.

Disassemble the motor first, then the bearing.