11/7/2022 0 Comments Screwdriver bitsWith the fewest points of contact of any system, slot bits cam-out at very low torque.Īlso, it is hard to find slotted fasteners and bits that match exactly between brands, because of the wide-spread, more-or-less unstandardized manufacture of slotted tools and fasteners. Cam-out is much more likely with drive systems that have fewer points of contact between the bit and the fastener, like the slot system. The "slot" or "slotted" drive system is one of the oldest fastening systems, and it is the most simple. To extend the life of power bits, it's best for shoppers to buy high quality bits made from wear-resistant materials.Metal balls inside a quick change chuck engage a power bit's power groove when the bit is installed. Quick change chucks are increasingly popular and standard to many impact drivers/wrenches. Power Bits Because power bits are generally more expensive than insert bits, they're usually bought to last longer than insert bits.Ī power bit's power groove is shaped for use in quick change adapters and chucks. Because of their low cost, insert bits are an especially good choice for drive systems that tend to wear bits down through frequent cam-out, or any application where bits are expected to wear through frequent, heavy use.The snap ring notch on the bodies of insert bits helps them hold firmly in bit holders. Their expendability remains their greatest strength.Īlthough they are often installed directly into jaw chucks by users, insert bits were originally designed to fit in the ends of extension adapters. Insert Bits Insert bits are small and inexpensive. Designs with more contact points to the fastener distribute pressure more evenly, have more driving power due to increased contact area, can handle more torque before camming-out, will cam-out less, and will wear more slowly by consequence.īefore discussing the different drive systems available on the market, shoppers can tackle a much simpler decision between insert bits and power bits as discussed below. A lot can be understood about a screwdriver bit drive system just by looking at the shape of its point. A drive system's tendency to cam-out also affects how quickly or not the bit will wear. Some drive systems will cam-out at lower torques, others at higher torques. "Cam-out" is what happens when the rotational force of a screwdriver bit causes it to disengage the fastener and slip out. Different drive designs, like Phillips, square, and torx, allow bits to drive fasteners at different torque settings before camming-out. But if you can choose drive type first, there are some things to consider about drive designs to match them to your application. If a bit is being purchased for specific fastener, then the drive type of the bit is obviously determined already. (In fact it has two bit holders, a 3" and a 6"!) I feel silly that I wasn't able to figure this out on my own, but with your help I eventually figured it out.Choosing drive type is the most important decision when shopping for screwdriver bits. Now that you educated me, I checked to see if the SHOCKWAVE bit set I bought includes a bit tip holder, and it does. Sorry for using a Home Depot link but I cannot even find non-SHOCKWAVE bits on the Milwaukee web site at all! Not even using Google to search for part number 48-32-1552!ĮDIT: Thanks for the responses. Here's the link, and a link to a SHOCKWAVE bit set for comparison. I believe I found one set of bits that would work with the M4 screwdriver. And if there are two standards I would expect the Milwaukee web site would make it easy to search for exactly the kind of bits you need, but there's no obvious way to search for non-SHOCKWAVE bits.Īm I correct that there are two standards and I need different bits for the M4 screwdriver? Or will the SHOCKWAVE bits work somehow with the M4 screwdriver? Maybe there is some kind of common adapter I could get? It seems strange to me that there should be two standards for screwdriver bits, differing only in length. Yet it's nearly impossible to find the suitable bits on the Home Depot web site almost all they have is SHOCKWAVE. The cross-sectional size of the bits seems identical (1/4" hex drive), but it seems that the M4 screwdriver needs longer bits. #SCREWDRIVER BITS DRIVER#(I guess with an impact driver a shorter bit is better, for strength.) So my best guess is that this set of bits was intended for use in a Milwaukee impact driver. Reading the label on the bits more carefully, I realized that it says "SHOCKWAVE Impact Duty". The head of the bit is nearly inside the socket it's hard to even reach it with my fingers to remove it, let alone drive screws with it. Home Depot has plenty of Milwaukee screwdriver bits and I bought a set. I bought a Milwaukee M4 cordless screwdriver (Milwaukee 2101-22) from Home Depot.
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