Mortar rakes for SDS plus drills
|An SDS plus drill varies from a regular power drill in that it is more powerful and has a different chuck system.|
|The type of drill bits you can use in an SDS plus drill therefore have different shanks to those used in regular power dills.|
|Power drills and SDS type drills have different chucks on them, so the shanks of the drill bits are different.|
SDS plus shanks
|The shank of a mortar rake designed for an SDS plus drill has the same internal female thread style as a mortar raks designed for an angle grinder.
It screws onto the external male thread of an SDS plus mortar rake adaptor. However, the size of the thread is smaller than that designed for an angle grinder spindle.
|The mortar rake adaptor designed for an SDS plus drill houses the male thread which the mortar rake is screwed onto and at the other end has a shank that is designed to go in the chuck of an SDS plus drill.|
|Here, the shank on the adaptor is different.|
|The shank on an SDS plus drill adaptor has four sets of grooves: two open ended and two closed ended.
Two of these grooves are where the ball bearings of the drill chuck run (closed ended) and the two others are where the mortar rake shank fits in (open ended).
The adaptor is therefore not held solidly in the chuck as it is in a standard drill. Instead, the ‘open ended’ and ‘closed ended’ grooves along the shank of the mortar rake adaptor provide channels in which the ball bearings of the SDS plus drill’s chuck can slide back and forth. This keeps the movement directed up and down, preventing the attachment from slipping or rotating freely.
|Unlike a standard drill, an SDS plus drill is designed to absorb most of the vibrations during use, making it easier to rake without a negative effect on the operator.|
|The benefit of using an SDS plus drill is that the shank is pushed into the SDS drill’s chuck and twisted until it engages with the grooves in the chuck.
The name SDS originates from the German ‘Sterk, Dreh, Sitz’ (insert, twist, stay), also commonly known by Bosch manufacturers as ‘Special Direct System’.
|An SDS shank is called an ‘SDS plus’ shank or ‘TE-C’ shank. These terms tell you what type of drill bits your chuck is designed to take.
‘TE-C’ is the alternative name set up for SDS plus type drills and drill bits. The name ‘TE-C’ is used by the worldwide building company Hilti.
|There are a variety of SDS type drills. SDS and SDS plus chucks and shanks are interchangeable. However, SDS Max accessories are not compatible with either of these.|
|You can tell which adaptor will fit into your SDS plus drill as the diameter of the shank and the number and placement of the grooves along the drill bit’s shank will follow the standard pattern for SDS plus drill bits.|
|The mortar rake shown here is used with an adaptor and is designed to fit into an SDS plus drill.|