Schurkey
Well-known member
I've been on a four-month quest to find a chuck screw for a Mac AD850 reversible half-inch air drill. This would be a reverse-thread, flat-head screw. I still need to put the fragments against a thread-pitch gauge to see what thread size it is.
If the drill wasn't reversible, there'd be no need to hold the chuck to the output shaft with a screw--the chuck would just self-tighten on the main threads. But since the drill turns backwards, a REVERSE THREAD screw keeps the chuck tight.
Having a reverse-thread (Left-hand) screw on a reversible drill is common as dirt. Problem is, no one around here carries reverse-thread screws.
Of course, I tried the local Mac Tools dealer. He prints out the parts list for an AD850/AD800 air drill. The Mac Tools part number (was) 70217. He says it's discontinued.
I call Mac Tools. The person in Customer Service tells me that 70217 is discontinued, but it's been superceded by VKG70217. I gave them my credit card info, and told them to ship three of 'em to me.
A month later, I still don't have my screws. I e-mail Mac Tools; and several days later they tell me that VKG70217 is discontinued, and my order was cancelled. Gee...thanks for contacting me with the news of the cancellation!
As it turns out, the Mac Tools AD850 and AD800 were made by Viking Tools; in the Viking line it's model V343/V344 (1/2") or V341/V342 (3/8) with the difference in part numbers being keyed or keyless chucks. All these Viking models are discontinued, and no chuck screws available.
The lady at Viking Customer Service eventually told me that the screws were supplied to them by "Dinosaur Inc." which seems an unlikely name for a hardware vendor.
Anyone have information on "Dinosaur Inc"? I don't see anything related to hardware in my web searches.
Anyone have a source for reverse-thread machine screws?
If the drill wasn't reversible, there'd be no need to hold the chuck to the output shaft with a screw--the chuck would just self-tighten on the main threads. But since the drill turns backwards, a REVERSE THREAD screw keeps the chuck tight.
Having a reverse-thread (Left-hand) screw on a reversible drill is common as dirt. Problem is, no one around here carries reverse-thread screws.
Of course, I tried the local Mac Tools dealer. He prints out the parts list for an AD850/AD800 air drill. The Mac Tools part number (was) 70217. He says it's discontinued.
I call Mac Tools. The person in Customer Service tells me that 70217 is discontinued, but it's been superceded by VKG70217. I gave them my credit card info, and told them to ship three of 'em to me.
A month later, I still don't have my screws. I e-mail Mac Tools; and several days later they tell me that VKG70217 is discontinued, and my order was cancelled. Gee...thanks for contacting me with the news of the cancellation!
As it turns out, the Mac Tools AD850 and AD800 were made by Viking Tools; in the Viking line it's model V343/V344 (1/2") or V341/V342 (3/8) with the difference in part numbers being keyed or keyless chucks. All these Viking models are discontinued, and no chuck screws available.
The lady at Viking Customer Service eventually told me that the screws were supplied to them by "Dinosaur Inc." which seems an unlikely name for a hardware vendor.
Anyone have information on "Dinosaur Inc"? I don't see anything related to hardware in my web searches.
Anyone have a source for reverse-thread machine screws?