{"id":21700,"date":"2026-10-01T05:01:35","date_gmt":"2026-10-01T05:01:35","guid":{"rendered":"https:\/\/tradefoxapps.sitepreview.me\/?p=21700"},"modified":"2026-11-09T01:29:41","modified_gmt":"2026-11-09T01:29:41","slug":"sds-drill-meaning","status":"publish","type":"post","link":"https:\/\/tradefoxapps.sitepreview.me\/fr\/sds-drill-meaning\/","title":{"rendered":"SDS Drill Meaning: Chuck Types, Hammer Modes and Common Trade Uses"},"content":{"rendered":"
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The SDS drill meaning comes down to its chuck. SDS stands for Slotted Drive System, a bit-holding standard developed by Bosch in the 1970s that lets a slotted shank slide back and forth while it rotates. It is designed for heavy-duty drilling and chiselling in materials such as concrete, masonry, and stone. In plain terms, it is a rotary hammer built to punch through masonry far faster than a standard combi drill.<\/span><\/p>

The name has a few recorded origins. Most references settle on Slotted Drive System, though the design’s German name, Steck-Dreh-Sitz, is sometimes translated as insert, twist, hold. Whichever version you go with, the meaning is the same on site: a tool-free chuck that grips a slotted bit and drives a pneumatic hammer action through it.<\/span><\/p>

This guide covers the chuck types, the hammer modes, where each tool earns its place across the trades, and the UK vibration duties every operator needs to work within. It is written for working tradesmen and people training into the trades, not casual users.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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How Does an SDS Chuck Work?\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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An SDS chuck holds the bit with ball bearings that lock into slots on the shank, rather than clamping it with three jaws. This locking system prevents the bit from slipping under the high torque and impact forces.<\/span><\/p>

The important part is what the design lets the bit do. It slides forward and back within the chuck while still being held securely and still receiving rotational drive. That sliding action is what engages the hammer. A piston inside the tool strikes the end of the shank, and the bit floats to transmit that blow into the material.<\/span><\/p>

This is the core of what separates an SDS tool from a hammer drill. A standard hammer drill vibrates a clutch mechanism to fake percussion. An SDS rotary hammer drives a genuine pneumatic piston, which is why it clears masonry with far less push from the operator.<\/span><\/p>

One practical point: the shank slots need grease. Because the bit slides inside the chuck, running it dry accelerates wear on both the shank and the chuck internals. Keep the shanks lightly greased and wipe grit off before you insert a bit. <\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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What Are the SDS Chuck Types?\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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There are two chuck types you will meet daily on UK sites, plus a couple of variants worth knowing. The difference is shank diameter, and it dictates the whole class of work each tool is built for.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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SDS Plus\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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SDS Plus is the everyday standard. SDS Plus tools have a smaller shank, at 10mm, compared to SDS Max, which is 18mm. The SDS Plus is made to fit into rotary hammers for tasks that are lighter than SDS Max projects. The 10mm shank carries two open grooves for the locking balls and two closed grooves that transmit rotation.<\/span><\/p>

For most first-fix and second-fix work, SDS Plus is the tool you reach for. It handles anchor holes through brick for cavity wall fixings, drilling out concrete for pipe runs, and general masonry fixings. It is light enough for overhead and one-handed drilling, and every major brand builds one.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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SDS Max\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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SDS Max is the heavy-duty class. With a larger shank, 18mm, they’re built for heavier-duty tasks. These SDS Max tools provide much higher impact energy, which makes them ideal for demolition jobs, breaking up concrete, or even deep drilling for tasks like rebar installation. The larger shank uses additional grooves to hold up under high-torque loads.<\/span><\/p>

If you are coring, breaking slabs, or drilling large-diameter anchor holes all day, this is the tool that survives it. It is heavier and pricier, and that weight is the trade-off for the impact energy.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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What About SDS-Top and Spline Drive?\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Two less common systems sit between Plus and Max. SDS-Top is an intermediate standard with a 14mm shank, found on some older mid-range rotary hammers. Spline drive is a separate system that offers similar performance to SDS Max but uses splined teeth rather than slots, so the bits are not interchangeable with SDS. You may still meet both on older kit, so it helps to recognise them.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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SDS Plus vs SDS Max: Quick Comparison\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Fonctionnalit\u00e9<\/th>\n SDS Plus<\/th>\n SDS Max<\/th>\n <\/tr>\n <\/thead>\n
Shank diameter<\/td>\n 10mm<\/td>\n 18mm<\/td>\n <\/tr>\n
Duty class<\/td>\n Light to medium<\/td>\n Heavy-duty<\/td>\n <\/tr>\n
Typical work<\/td>\n Anchor holes, pipe runs, cable chasing<\/td>\n Coring, demolition, slab breaking<\/td>\n <\/tr>\n
Weight and handling<\/td>\n Light, one-handed capable<\/td>\n Heavy, two-handed<\/td>\n <\/tr>\n
Bit compatibility<\/td>\n SDS Plus bits only<\/td>\n SDS Max bits only<\/td>\n <\/tr>\n
Best for<\/td>\n Daily trade work<\/td>\n Large-scale construction<\/td>\n <\/tr>\n <\/tbody>\n<\/table>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Are SDS Plus and SDS Max Bits Interchangeable?\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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No. The shank diameters differ, so the bits do not swap between tools. An SDS-Plus bit cannot be inserted into an SDS-Max chuck, nor can the reverse occur due to the Max bit’s larger 18mm diameter. This incompatibility is a safety feature, ensuring that smaller bits are not subjected to forces they were not engineered to withstand.<\/span><\/p>

Adapters exist, but treat them with caution. The adapter adds length and changes the bit balance. Under high percussion forces, this can cause bit breakage or tool damage. For anything beyond the lightest drilling, run the bit that matches the chuck.<\/span><\/p>

One useful thing about the standard is that bits are brand-independent within a chuck type. An SDS Plus bit from Bosch works identically in a Makita SDS Plus drill, a DeWalt, a Milwaukee, or a Hilti. You are buying into a shank system, not a brand.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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What Are the SDS Drill Hammer Modes?\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Most of these tools carry a mode selector, and understanding it prevents wrecked bits and ruined work. There are three common settings:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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