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iainalec
Junior Member
Joined: 14 Mar 2007
Posts: 1
Location: Ealing
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 Posted: Thu Mar 15, 2007 8:01 am Post subject: S.D.S. |
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Hello to everyone, my first question and you might think a daft one, but what does S.D.S. stand for.  : |
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uncle buck
Senior Member
Joined: 28 Feb 2007
Posts: 106
Location: Newcastle T&W
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| Posted: Thu Mar 15, 2007 8:47 am Post subject: |
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Hello & welcome to the forum.
SDS = Spline Drive System  |
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ultimatehandyman
Site Admin
Joined: 16 Jul 2005
Posts: 9751
Location: Darwen, Lancashire
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| Posted: Thu Mar 15, 2007 9:01 am Post subject: |
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In A manual that I have here it says it is a special direct system
I have seen quite a few different names for this abbreviation and so there are probably a few!
SDS drills are superb and are much better on masonry than rotary or percussion drills.
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handyman
Senior Member
Joined: 16 Jan 2006
Posts: 2866
Location: Alderley Edge, Cheshire
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| Posted: Thu Mar 15, 2007 11:39 am Post subject: |
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yes, sds drill bits go through hard bricks like they are butter, superb stuff.
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Gadget
Jack Of All Trades
Joined: 18 Dec 2005
Posts: 3558
Location: Whitley Bay
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| Posted: Thu Mar 15, 2007 2:00 pm Post subject: |
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Or ....Slotted Drive Shaft!!........I've that many explanatios!!
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By eck! |
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dewaltdisney
Senior Member
Joined: 20 Jan 2006
Posts: 577
Location: Essex
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| Posted: Thu Mar 15, 2007 6:50 pm Post subject: |
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I believe it stands or Special Direct System. Bosch invented it iun teh 70's for their hammer drills. The system has gradually been adopted by all manufacturers. The German is Spezielles Drektes System
DWD |
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Hitch
Senior Member
Joined: 16 Jan 2006
Posts: 2534
Location: Somerset
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| Posted: Thu Mar 15, 2007 6:55 pm Post subject: |
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Another vote for 'special direct system' :grin:
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uncle buck
Senior Member
Joined: 28 Feb 2007
Posts: 106
Location: Newcastle T&W
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carhartt kid
Senior Member
Joined: 17 Aug 2006
Posts: 352
Location: Bristol
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Hinton Heating
Gas/Heating Expert
Joined: 16 Jan 2006
Posts: 4307
Location: Bournemouth
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| Posted: Mon Mar 19, 2007 1:31 pm Post subject: |
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this one!
Special Direct System (SDS)
Developed by Bosch in 1975 for hammer drills, the SDS uses a cylindrical shank on the tool, with indents to be held by the chuck. A tool is inserted into the chuck by pressing in, and is locked in place until a separate lock release is used – no tightening required. The rotary force is supplied through wedges that fit into two or three open grooves. The hammer action actually moves the bit up and down within the chuck since the bit is free to move a short distance. Two sprung balls fit into closed grooves, allowing movement whilst retaining the bit. SDS relies on a tool having the same shank diameter as the chuck - there are three standard sizes:
SDS-Plus – a 10 mm shank with two open grooves held by the driving wedges and two closed grooves held by locking balls. This is the most common size and takes a hammer up to 4 kg. The wedges grip an area of 75 mm² and the shank is inserted 40 mm into the chuck.
SDS-top a 14 mm shank similar to SDS-plus, designed for hammers from 2 to 5 kg. The grip area is increased to 212 mm² and the shank is inserted 70 mm. This size is not common.
SDS-max – an 18 mm shank with three open grooves and locking segments rather than balls. It is designed for hammers over 5 kg. The wedges grip an area of 389 mm2 and the shank is inserted 90 mm.
Many SDS drills have a "rotation off" setting, which allows the drill to be used for chiselling.
The name SDS comes from the German "Steck – Dreh – Sitz" (Insert – Twist – Stay).
German-speaking countries may use "Spannen durch System" (Clamping System), though Bosch uses "Special Direct System" for international purposes.
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dewaltdisney
Senior Member
Joined: 20 Jan 2006
Posts: 577
Location: Essex
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| Posted: Mon Mar 19, 2007 2:35 pm Post subject: |
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So I win the prize for first to post the right answer. (and I did not look it up  )
DWD |
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