We use the Hillman 4000 key machine at work and recently we changed the jaw assembly and adjusted it, however some keys, KW-1 and KW-10 sometimes don't cut correctly. The customer states the key goes in and won't turn. Other keys, house and car seem fine. Any ideas why those two keys have occassional problems? We buff the keys to smooth them out. Could it be a bad batch of blanks? Hillman is our supplier. Thanks.
16 years ago