Dewalt bit types

What type of bits do the Dewalt model #  D25551 , Type 2. 

1 9/16″rotary drill/ hammer drill/ hammer combo. uses??? 

 

Also what adapter chuck is recommended to use ordinary 1/2″  drill bits

Specifically I needed to know the spline type design that is inserted into the chuck.

Welcome to the forum.

 

Here is the Owner’s Manual, available in the link.

 

That part number accepts a 12 spline bit.

 

This adapter might work.

 

IMO a different tool, that accepts SDS Plus or SDS Max bits is probably a better option than this dinosaur w/ weird bits.

 Question. Does the D25551 uses SDS, SDS Max or SDS Plus???

I want to insert into the chuck an adapter chuck that will allow me to use more readily available bits of newer spline design.

No to all of the above.

 

Examine the previously linked manual. (Navigation required, then in the bottom left corner)

 

Four model numbers use the spline drive, including the one for the OP. Three use SDS-Max bits, those have different model numbers.

This link appears to have spline drill bits.

 

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Here is a spline to SDS Plus adapter. That DW5791 may be very difficult to locate.

 

Here is one.

 

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One point I find interesting in the Owner’s Manual does not specify a grease for the bit.

 

My Bosch RH540M SDS-Max tool defines usage of a grease each time the bit is changed.

 

IMO that would be a good practice to implement.

Thanks for your detailed help. It was so appreciated.