It depends to where you want to apply your lubricant. If you want to lubricate the chuck with the sds drill bit you simply add some cheap grease on the drill bit and the drill bit will slide easily on the chuck. On the other hand if you want to lubricate the sds drill machine then there is a special type super grease that you can buy from Dewalt in order to do so. Also since in order the super grease to be needed this means that you have used the drill a lot then also is needed to change o-rings, brushes and so on. So usually you have to ask for a service center to do it since they know how to do it properly and using the right kit.
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It depends to where you want to apply your lubricant.
If you want to lubricate the chuck with the sds drill bit you simply add some cheap grease on the drill bit and the drill bit will slide easily on the chuck. On the other hand if you want to lubricate the sds drill machine then there is a special type super grease that you can buy from Dewalt in order to do so. Also since in order the super grease to be needed this means that you have used the drill a lot then also is needed to change o-rings, brushes and so on. So usually you have to ask for a service center to do it since they know how to do it properly and using the right kit.