Description: Three (3) Precision Drill Bits for Vintage Mechanical Pencil Repair In my experience, a good 90% of old mechanical pencils that don't work are only jammed. Nothing is wrong with their mechanisms, but lead is stuck inside, freezing everything up. Sometimes it's just a single piece of lead that won't budge, sometimes a piece has broken inside and gone sideways, fragments getting into the propelling mechanism. Clearing out the jammed lead isn't hard, but it requires a drill bit of just the right size. Too small, and a tube of lead remains which has to be broken up and coaxed out with a sharp pick. Too large, and the fit of the lead in the nozzle and mechanism can be left sloppy and loose. These precision twist bits are carefully sized for optimal fit in mechanical pencils that use 1.1 mm lead, which was the most common size for approximately the first half of the 20th century. These drills are only a few hundredths of a millimeter (thousandths of an inch) thinner than the lead they are designed to clear, and they are made with spiral flutes that are sharply twisted, which extracts pencil lead residue far more effectively than the nearly-straight flutes found on standard hardware store drill bits. Note that pencil lead sizing is nominal -- 1.1mm, 1.18mm, and 1.2mm lead is actually all the same thickness, metric approximations of a size originally denominated in inches (.046 inches, to be precise). You will get three (3) drill bits, all the same size -- these are older production by Brown & Sharpe, top quality made in the USA. Finally, the usual disclaimers: use at your own risk, turn by hand only (a pin vise is recommended), and work slowly and carefully so only lead is removed, not metal. Payment We are glad to combine shipping charges on multiple purchases, but it is vital that the proper checkout method be used. When buying more than one item, use the Add to Cart button -- NOT the Buy It Now button. View your cart when you are ready to complete the purchase, and if the total shipping charge is incorrect, do NOT pay. Instead, click the Request Total link at the top right and we will send you a corrected invoice. Terms of Sale We strongly believe in full and explicit description of any condition problems or flaws, and in very conservative grading. We stand behind our descriptions -- buy with confidence. About Us vintagepens is run by David Nishimura (Vintage Pens LLC) based in historic Providence, Rhode Island. David has been buying, selling, and writing about old writing instruments since the late 1980s. He has been on eBay since 1997, the same year he launched one of the first vintage pen collecting websites. David is an active pen history blogger, and a regular presence on pen collecting forums and social media, as well as at traditional pen shows.
Price: 10 USD
Location: Providence, Rhode Island
End Time: 2024-08-29T23:36:37.000Z
Shipping Cost: 4 USD
Product Images
Item Specifics
Restocking Fee: No
Return shipping will be paid by: Buyer
All returns accepted: Returns Accepted
Item must be returned within: 14 Days
Refund will be given as: Money Back
Country/Region of Manufacture: United States
Lead Diameter: 1.18 mm
