Machining Tips
Multiple Margin Drills
Double margins refer to an additional margin ground just behind the leading margin on each drill land. Double margin drills generally range to one inch in diameter while triple margin drills kick in above one inch in diameter. One function of these additional margins is to stabilize the drill when…
Reamer Basics
Often, we are asked to recommend an appropriate amount of material to be left in a drilled hole for a reamer to efficiently size to a finished diameter. The general guidelines are
Work Hardening
Avoid Work Hardening of Materials What causes work hardening is the heat generated by the cutting tool transferring to the work piece material causing plastic deformation. In fact, it is appears to act like a heat treatment to the work piece but on a lower scale. To recognize this condition…
Excessive Reamer Wear
REAMING – EXCESSIVE REAMER WEAR OR BREAKAGE: The following is a list of items to consider that may adversely affect reamer life or in some cases, damage the reamer. Misalignment creates a bell mouth condition and premature wear. Lack of chip space in the flutes. Inconsistent material condition. Dirt or…
Poor Threads Quality
Often taps get the blame for poor thread quality or rejected threads and it is natural to look to the tap itself as the culprit. Actually, the tap is often the victim of a badly drilled hole. You can’t produce a great thread out of a bad hole! Following are…
Pulley Taps
We are frequently asked by end-users to provide a pulley tap to produce a longer thread length than what is on the tap, but in all cases the standard pulley tap has a shank diameter that is greater than the tap major diameter, and therefore cannot be used to produce…
Tension and Compression Tapping
TAPPING Programming Information: Experience has shown that a tap will cut the best quality threads when allowed to act as its own lead screw, feeding precisely on pitch to exactly the required depth of thread. The machine must be prevented from forcing the tap to do anything else or the…
Kenway Mills
Both standard and keyway end mills are generally manufactured to the same geometry features such as rake, clearance, base material. Even the blank dimensions and coatings applied are the same. The difference is the tolerance of the cutting diameter of the tool. Most standard single end, end mills are manufactured…
Erie Industrial Supply Company