72Ĭarbide Taps for all of your tapping needs. We apologize for any inconvenience caused. Please email us at for assistance during this time. Excessive depth does not equal extra strength. Our phone system will be undergoing a short period of planned maintenance from 10am CST today (). A 65% thread is only 3% stronger than a 55%ĩ. Unless specifically required, 65% or less thread height is sufficient in Slow will cause chip packing and premature breakage.Ĩ. Spiral flute taps are designed to eject the chip. Chipping of spiral point taps is generally caused by RPM that isħ. Tapping, too slow can cause as many problems as running too fast.Ħ. Be aware of the correct RPM range for the material you are Surface treatments reduce friction and help prevent galling andĥ. Make sure you are using the correct GH Limit.Ĥ. Make sure the hole is clean,ĭo not over peck especially in stainless and nickel based materials.įor best results use OSG cobalt and carbide drills for the best holeģ. Use the correct style of tap for the job.Ģ. * To calculate metric threads divide the pitch by 25.4 and multiply by RPM to give you IPM.Įxample: M8 x 1.25 500 RPM 1.25/25.4=0.049x500=24.60ġ. Stainless Steels 300, 400 Series S/O, TiN, TICN Tool Steels A2, D2, S7, H13 etc up to 35 HrC S/O, TICN Low 1010 - High Carbon 1080, A36 Hot Roll. Use the right OSG tap and coating for the material and application. Check out our newest GWS Manufacturing 101 whitepaper on our website Click the link below to learn about the many benefits of using Ni-alloys in aerospace including its high strength and durability, corrosion resistance, reduced weight and cost-effectiveness. There are usually two processes, pvd a lower cost coating and cvd which provides better grain structure, harder surfaces and up to four times longer tool life. The hardest of all coatings, (8,000 vickers) used in non ferrous applications, aluminum, copper, graphite, etc. Dry machining in the high speed applications is possible.ĥ. It also has the highest oxidation temperature (800 c) primarily used on carbide drills and end mills. One of the hardest (2,800 vickers) with good lubricity (0.3 coef. Can also be used for aluminum and cast iron with good results.Ĥ. Harder than TiN (2,700 vickers) better for hard steels. A hard (2000 vickers) durable surface coating (5 microns) that offers high lubricity (coef, of friction 0.4) increases tool life and also utilizes higher speeds and feeds than uncoated tools.ģ. A porous surface that retains cutting fluids to help add lubricity, reducing heat and friction.Ģ. 220, right in the middle of the tolerance. 0005Įxample: for 1/4-20 tap using a GH5 limit the actual tap P.D. Slow spiral for hard materials Draws chips out Spiral flute for aluminum Flute design draws chips outĦ. Spiral flute (new style) necked or din style Draws chips outĥ. Spiral flute (old style) Draws chips outĤ. Hand style straight flute Chips stay in fluteģ. ©=copyright - ‘Technical Data’ shown in our site can be freely used.Written by Mike Whitney and OSG Tap & Dieġ. Go back to: File menu (click on it)- click on Print - type Number of Copies required - click on Print. PRINT any Technical Data page you are viewing - [To help you do this, go to: File menu (click on it), click on Page Setup (in dropdown menu) - set Margins at 6mm for Left, Top, Right, Bottom - click OK. On our website there is a lot of other very useful ‘Technical’ Data & Information for you to view Tapping speeds are determined by many factors, main ones being:Ī) ‘bottom’ lead is used or ‘spiral-flute’ taps are usedī) lubricant is poor, or flow is restrictedĮ) if cutting ‘taper-threads’ (50 percent normal speed)į) if cutting ‘Acme’ or ‘Trapezoidal’ threads (40 percent normal speed) RPM = Feed speed (SFM) divide by 0.26 x tap OD(outside dia) Tapping speeds (RPM=Revs per minute) can be calculated:. There are many variables that can affect tapping speeds - experiment to find the ideal.Ī good rule is to start at a slow speed and work up to a faster speed Speeds for machine tapping using HSS taps FEED, SPEEDS & LUBRICANTS (guidelines/recommendations shown below):
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |