b'Deburred Without Delay ing bores. around the hole instead of the foot-The Cofa and Cofa-X are spe- ball shape youd see using a stan-cifically designed for irregular sur- dard chamfer tool.of spring-loaded deburring toolsfaces,Baumetsaid.LetssayHere again, multiple grades, ge-extends that diameter range to 50.8youre deburring a hole drilled onometries, diameters and lengths are mm (2"). Multiple lengths, geom- an angled surface or a cross-hole inoffered, and both companies pro-etries and coatings are available,a piece of tubing. Here, the bladevide application and programming and the Burr-Zit series can be pur- actually pivots in and out of theadvice to those getting started. chased in kit form to cover a rangeholder for continuous engagement.While Dean and Baumet might not of hole sizes. You get a nice, even chamfer allagree on which brand of deburring Dean said Handi-Burr typically is reserved for manual deburring op-erations in a drill press or power tool while Burr-Zit is suitable for CNC and manual equipment. He also said both tool types are only for deburring, in that they produce a rounded edge. If a qualified, dimen-sionally accurate chamfer is needed, it should be machined using an ac-tual milling cutter.Deburring in a SnapMatt Baumet, technical sales en-gineer at Heule Tool Corp., Love- Phil Johnsonland, Ohio, suggested several simi- Master lar alternatives. The companys SnapTool Grinderfront and back chamfering tools, for example, feature a replaceable, spring-loaded blade and are in-tended for use with CNC machine tools while providing more accu-rate chamfering than tools for only deburring.It depends on the hole size and material, he said, but you could expect to hold plus or minus a cou-ple thousandths on a chamfer.Also available are the Cofa uni-versal deburring tool for ellipticalPRECISION AMAMCO Tool developed the F100 or contoured surfaces, the Defa ad- TOOLI NG compression router for high-performance justable chamfering tool and the XF-35 \x1fghter composites.versions of Snap and Cofa for de- AT THEburring cross-holes and intersect- It completes an entire wing with justSPEED OF two tools.SOU N D That means more speed, less waste, about the authorfewer toolsand major cost savings.Kip Hanson is a contributing writer for CTE. Contact him at 520-548-7328 or800.833.2239 [email protected]/cteguide.com33Deburring.indd 33 2/14/20 3:16 PM'