The tubular end of the screwdriver shank is magnetised so the bits stay firmly in place. As a result, damage to the screw is prevented. with a Yankey drive flat bit ground to be hollow. This can damage the screw threads, and is the mark of an inexperience and/or uneducated gun smith. I've got a 3/8" diameter grinding wheel that I use to grind my custom drivers. 4.7 out of 5 stars 97. I have one, along with a comprehensive driver bit set (hex's, torx etx) bought from a tooling supplier and a Borka torque wrench. This allows the full flat grind to pass through materials with more ease than other grinds who slope non-linearly (hollow), or at steeper angles (sabre). The grind of a blade is where a key battle is won, and blade geometry varies widely. $115.00. The typical flat-head screwdriver has a tapered profile, narrower at the tip of the blade than closer to the handle. Lg. Wheeler 562194 Professional Gunsmithing Screwdriver Set 89 Piece. I bought my set of screwdriver bits for under $20 online and now I don’t damage anymore gun screws. I am a kitchen table gunsmith myself, and before I learned about using hollow ground screwdrivers on my firearms I buggered up plenty of firearms. While their thickness does taper, they remain a consistent size near the end of the tip. In conclusion, proper tools don’t cost a whole lot more than improper tools (with the case of hollow ground drivers, they cost the same or less) but make your work easier and contribute to a professional repair. We’re generally advised to buy high-end if we can. As you can see from the picture below, the tapered shaft on the left does not fully engage with the entire screw slot. I asked the clerk where they kept their hollow-ground screwdrivers.....he led me to the one-size-fits-none flat-ground aisle. My set gets called upon a lot more often than I expected it to when I bought it. Jeff Premium manufactured gunsmith screwdriver set with up to eight custom hollow ground fit and square shank screwdrivers. If you have ever had the wide head of a tapered screwdriver keep you from unscrewing the back of a piece of electronics you will know what I am talking about. Feb 3, 2003. The regular flathead screwdriver (left) tapers to the end of the tip. Also known as hollow-tip or parallel-ground screwdrivers, the straight slotted tip fills the screw slot better than the tapered tip on standard screwdrivers for more torque and less slippage. The only time I use hollow ground blades is for rounded heads on screws - otherwise the wedge shaped blade is the right profile for the job on flat head screws. Well, three days or so into the new house, I had the urge to tinker with a gun, so I head down to the nearest hardware store to buy some good screwdrivers. The reason that Gunsmith's Screwdrivers are so prized is that the tips are hollow-ground, not double-wedge shaped - so that torque is applied at the bottom of the screw slot where it is strongest, not the top. However not all individuals that like guns know the difference between a normal and gunsmith screwdriver. * 12 - hollow ground bits for slotted screws * 15 - hex bits in inch and… Compare to. From Precision sets to Insulated sets, there’s a driver for your job.… While a hollow ground tool can be more fragile, they are also more accurately shaped, which is of utmost importance when working on firearms. Cushion Grip Stubby Screwdriver Set, 2 Pc. And, the ideal parallel section is ground at the tip to fit the screw slot properly through the full width and depth of the slot. Lyman Master Gunsmith Tool Kit - 45 pc. Your Home for DIY Prepper Projects and Information. About our 3 Gunsmithing Screwdriver Sets. 99 $99.99 $99.99. The contractor/handyman/household screwdrivers (Craftsman, etc.) Cushion Grip Screwdriver Set, 7 Pc. Material: Finish: Handle Material : … Where did you buy yours? NEW. All Rights reserved. The blade tips are then custom, precision-ground in a crisply radiused, hollow-ground shape to give maximum strength. Free shipping. Klein Tools 85076 at $49.97. As a result, damage to the screw is prevented. There are also some variants which mix different types of grinds, such as a knife which is only flat ground … Register for the world�s largest manufacturing technology forum for free today to stay in the know. It seems strange that when they become worn we should flat -grind them when as Chuck says “a flat ground screwdriver will always mark the top edges of the screw slot.”. This post will fix that. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. 11 watching. We'll bring you the most relevant peer-to-peer conversations happening in the trade and tips and tricks to help you get the job done. Powered by vBulletin� Version 4.2.5 The Wheeler Engineering screwdriver set is really good, all hollow ground and at least 30 different bits to suit most firearms. Can you recommend a set? The latest industry news—straight to your inbox. With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. This means that the torque from tightening the screw is unevenly applied. © 2020 Copyright Practicalmachinist.com. The flat grind is the simplest grind pattern for any knife. Free shipping. This screwdriver bit set is best suited for the average shooter who likes to work on their firearms. Flat grinds are great for whittling and general use. Hollow ground screwdrivers and tips are much different. They're great screwdrivers around the house, but they are not suited to gunsmithing. Additionally, a hollow ground screwdriver has a head that is the same diameter of the shaft. FREE Shipping by Amazon. One often sees the phrase “hollow ground” applied to gunsmith screwdrivers. ... Vintage Type Gunsmith Hardwood Handle Screwdriver Gun Tool Hollow Ground Kit Set. In order to be considered a true flat ground blade, the knife must be entirely lacking in bevels. If you order the AGI full course with the tools, you get sent a Grace screwdriver set. However they have to be fitted to the screw slot, and from your description, I'm guessing your blades have not been fitted correctly. Real Avid Smart Drive 90 Professional Gunsmithing Screwdriver Set with Hollow Ground Square Cut Slotted Tip Bits, Scope Turret Tool and Ergonomic, Force-Assist LED Illuminated Bit Driver, Red. Simple solution already posted...we have high speed sensitive drill with a diamond round or stone and the screwdriver is held in a small vise that is then held by hand to make tip hollow ground. Save 50%. Cushion Grip Screwdriver Set, 7 Pc. Unlike most sets … Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. If screwdrivers were an issue for him, he'd change in a heartbeat. Who knows when the first argument over the best blade grind started? Excellent advice on using a drill press to hold a bit on a tough screw. Grinds are great for whittling and general use while their thickness does taper, they remain consistent... Easiest way to learn new techniques, get answers quickly and discuss challenges... More often than i expected it to when i bought it Master Tool. Last year, Practical Machinist is the simplest grind pattern for any knife much gentler on a gun tht the. 154 Items Lyman Master gunsmith Tool Kit - 45 pc they 're great screwdrivers around the house, but are... Is almost always superior to flat grinding except for very specific purposes flat grinds are great for whittling general... 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