![]() The cut taps (I tried two different brands.no name from McMaster and Taylor taps) did not run in easily.I had to squeak them in an eighth of a turn at a time and it took forever as you can imagine. Since I'm gonna need to make these in respectable quantities (dozens) I need to find a better way that doesn't clinch my sphincter quite so hard as these ones did. So all has to be concentric (as good as I can realistically make it). They were the Devil's very own to tap.3 mm deep full threads because a shoulder bolt threads into these and is located by the recessed pocket you see. The problem is with the tapped holes they are M1.6 x 0.35 and they were put in with a cut tap. They will eventually be heat treated to condition H900.the stock is currently solution annealed (condition A). Bronze: Kerosene or mineral spirits mixed with a small amount (10–15%) of petroleum-based cutting oil.I have a project I've been working on and some of the parts are 17-4 PH.Īttached is a picture of two of the parts, and I have quite a few more to make. Aluminum: Kerosene or mineral spirits mixed with a small amount ( 15–25% ) of petroleum-based cutting oil. An air blast should be used to clear chips. This mixture is also suitable for use with stainless steel. Alloy Steel: Petroleum-based cutting oil mixed with a small amount ( approx. Recommended lubricants for some common materials are as follows: Carbon (mild) Steel: Petroleum-based or synthetic cutting oil. The use of a suitable lubricant is essential with most tapping and reaming operations. This fliud will extend tool life and yield a super machined finish.Clings to vertical surfaces for continual lubrication.Cutting Tool Lubricant Type 11-AG Ultra S/P™ Super Premium - High Viscosity Heat - treat M2 as the base drills before coating would measure 880 HV (65RC). * Coating hardness is measured in HV (hardness in Vickers). ![]() However, the end user still needs to be cautious to not exceed the limitations of the high-speed steel.For semi-dry to dry cutting of most steels, high-nickel alloys, stainless steel and cast iron.ALTiN/TiAIN coating is great choice in machining stainless steels (All) at any speed.Titanium Aluminum Nitride (TiAIN) - (4500 HV)* Layer of TiCN to a cutting tool will increase life span up to 6X.Designed for hardened steels and cast iron up to 45 Rockwell C.Suitable in very abrasive and high tensile materials.Recommended for aluminum, brass and bronze applications.Titanium Carbon Nitride (TiCN) - Pink to Purple (4000 HV)* Can push it 10–25% faster, but may compromise tool life.Results in drilling through steel ranges 2X to 6X life span.General purpose coating, low heat resistance and good lubricity.Informative Tapping Checklist Benefits of Coating Tools Titanium Nitride (TiN) - Gold (2900 HV)* Recommended Feeds and Speeds table below suggests a "starting point" for selecting the speed to operate the tap. Vertical tapping speeds can be increased, compared to horizontal tapping. Holes, taps with tapered chamfers are able to operate faster than taps with bottoming chamfers. Speeds must be reduced as length of hole increases. The optimum speed for tapping is highest speed that conditions permit, consistent with acceptable tool life. Proper tapping speeds are very important in obtaining efficient tapping results. Cutting taper threads (50% Normal Speed). ![]() ![]()
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