![]() If you have the model number of your tool but aren't sure about which chuck design it uses, try the following: But, like its title on our parts page for this tool, chuck system details are usually omitted from a tool's title after sale, since the model number is included in the title and is the surest way of leading to accurate information concerning the tool. ![]() The point is that if the chuck system isn't already known, then the tool's model number must be known in most cases to find out which system it uses.Įxample: The Bosch 11224VSR Hammer Drill uses an SDS-Plus system, and probably included that information in its advertised name. Also, the name of the chuck system may be written on the tool somewhere and can always be found in the user manual. However, because a tool model number always corresponds to only one kind of chuck system, model numbers are used to pinpoint the exact tool (chuck system included) after sale. Tools that use these systems will almost always be advertised with the name of the chuck system as part of the tool's advertised name. The type of chuck system cannot be determined by simply looking at the chuck, probing its opening with a finger, or by any other means. Hammer drill and rotary hammer owners must know which chuck system their tool uses. (SDS and SDS-Plus are the only cross-compatible bit systems, making the terms interchangeable.) Comparably, any SDS MAX or Spline bit will also fit perfectly into any tool with a matching chuck system. So, for example, any of the SDS-Plus bits pictured below (despite their differing bit diameter, length, and other features) will fit perfectly into any SDS/SDS-Plus chuck system, because their shank diameters are the same, and the number/placement of their grooves are the same. The number and type of grooves/keyways on the bit shank that fit into the innards of the chuck. The diameter of the bit shank (the end of the drill bit that fits into the chuck), andĢ. This is because the type of chuck system completely determines two things:ġ. Although there are other bit type considerations when making a purchase, as far as making sure that the bit shank will fit the hammer chuck, matching it to the chuck system is the one and only step. Match the Bit Type to the Chuck System To find a compatible bit for your hammer drill or rotary hammer, you only need to know one thing: the chuck system (SDS/SDS-Plus, SDS Max, or Spline). This article explains the design differences between these systems, and it explains why knowing a power hammer's chuck system design is the key to getting a compatible bit for that hammer. SDS/ SDS-Plus (in terms of compatibility, "SDS" and "SDS-Plus" are completely interchangeable.) For hammer drills and rotary hammers, there are three major chuck/bit design systems available:ġ. The most important factor in matching a bit to its hammer drill is knowing the chuck system of the tool, and choosing bits designed to correspond to that system. ![]() We're happy to take this opportunity to sort through the jumble, break the information down, and make the task of finding the right bit easy, like it should be. ![]() The confusion is very understandable, considering that there are several drill bit systems and terms out there that sometimes overlap in definition and compatibility. If you aren't sure about the size you need, consider investing in a drill bit set with multiple bit sizes."What type of drill bit fits my hammer drill?" This is one of the most common questions we get from hammer drill and rotary hammer owners here at. It's also recommended to check the size of the bit, so you don't end up drilling a hole that is too big or too small for the intended purpose. Various drill bits are designed for very specific purposes, such as plug cutter bits and installer drill bits, while other bits have more general use, making them suitable for a wide variety of projects. The type of work should also be a primary factor when you are looking for a new bit. ![]() There are also cobalt drill bits to bore through metal, or more general-use products, like black oxide-coated bits or titanium-coated bits. You can find high-speed steel drill bits for wood, fiberglass, PVC, and soft metals, or you can opt for carbide tipped bits for working with tile and masonry. One of the first considerations should be the type of material you are working with. There are many different factors to consider when it comes time to choose a drill bit.
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