How to Disassemble and Lubricate a Hammer
I welcome you to my site! This article will discuss the lubrication of a rotary hammer. The operation of this tool requires not only a simple respect. Be sure to periodically lubricate the gearbox and cartridge.
In this case, the gearbox, of course, is already lubricated from the factory. But over time, the grease leaks somewhere, dries somewhere. In addition, it is intended only to reduce friction, and not to eliminate it. Therefore, one way or another, and the parts still rub against each other, due to which fine metal dust gradually forms, which remains in the lubricant.
As a result of such mixing of metal and lubricant, the properties of the latter are gradually lost and the wear of parts is accelerated.
Inexpensive Chinese rotary hammers can be poorly lubricated at the factory. Experienced service center masters recommend after disassembling even a new such device, disassemble and grease it immediately
The cartridge from the factory is dry. Here, in fact, it is not the cartridge itself that is completely missed, but only its place that is in contact with the drill, since it is in it that strong friction occurs, without reducing which the cartridge itself and the drill stem can be damaged.
So, below we will consider how and how to lubricate these elements. An SDS puncher with a horizontal engine arrangement will be considered, since it is in the vast majority of cases that it is used by home masters, and the article is mainly written for them.
How to lubricate a hammer drill
Different types of greases are used to lubricate the gearbox and drill chuck.
It uses a special lubricant, which should be called. gear. It can be like under the brands under which the perfs themselves are produced. Makita, Bosch, AEG, etc.
But it can be released by a company that deals with this particular type of product, for example, Ravenol, Shell, Xado, etc.
Some use for this purpose simple lithol or salidol. But compared to special lubricating products, they dry out faster and do not eliminate friction as much as necessary.
Everything is exactly the same here. Special lubricants for this purpose are called. for the Boers. And also usually produced by the same companies that do the punchers.
For lack of special grease, you can use graphite. But it does not so well remove heat from the shank, and this is important, since sometimes with prolonged use the shank can be flattened, which is why it is then difficult to remove it.
Video: How to Disassemble and Lubricate a Hammer
Lubricate the gearbox
You will need to disassemble the tool body. Follow the steps:
- Disassemble the cartridge. To do this, first remove the rubber ring. Then pry off with a screwdriver and remove the snap ring. Next, the outer casing of the cartridge is carefully removed, and then the clamping ring, ball and spring are removed.
- Now disconnect the mode switch. This is done differently depending on the model. At the end of the article, I gave a number of links to videos that describe how it is shot on a particular model. If among them is not your unit, then you can look at any of these to understand the principle. And then, I think, it will not be difficult for you to disconnect it from yourself.
- Remove the collector from the brushes. To do this, unscrew the back cover of the case and remove the brushes.
- Unscrew the self-tapping screws that longitudinally tighten the case, and disconnect it.
- Remove gearbox with motor armature.
Now thoroughly flush the gearbox itself, as well as the inside of its housing. Washing can be carried out, for example, with gasoline.
After that, first the most critical parts are smeared. And then the entire gearbox is completely enveloped in grease.
Well, it remains to collect everything in reverse order.
Lubricate the chuck and drill shank
This operation is very simple, so its description will be quite short.
Just take the lubricant and add it directly to the cartridge. Another option involves applying it to the shank and then installing it in the socket of the cartridge. But no one forbids combining these two methods for reliability.
Care must be taken to ensure that grease is constantly present and add new as needed. If this procedure is neglected, the liner will overheat, which will lead to its separation from the rest of the drill or to flattening. Therefore, do not be lazy and add.
That’s all you need to know by cartridge and liner.
As promised, I enclose at the end of the video link with the switch disconnected:
This is all the information that I have on the lubrication of the punch. I hope it was clear and accessible. I say goodbye to this. until we meet again!