Общий каталог Widia 2017 - страница 1808
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Каталог Widia токарный инструмент 2017
Каталог Widia трохоидальное фрезерование
Каталог Widia техническое руководство по разверткам
Каталог Widia фрезы со сменными пластинами 2016
Каталог Widia достижения 2020- Table of Contents
- Turning
- Turning • ISO Inserts
- Turning • Tools for External Turning and Internal Boring
- Turning • Tools for External Turning and Internal Boring
- Turning • Tools for Small Hole Boring
- com E1Turning • Grooving and Cut-Off
- Turning • Threading
- Indexable Milling
- Indexable Milling • Face Mills
- Indexable Milling • Chamfer Mills
- Indexable Milling • 90° Shoulder Mills
- Indexable Milling • Helical Mills
- Indexable Milling • Slotting Mills
- Indexable Milling • Copy Mills
- Solid End Milling
- Solid End Milling • High-Performance Solid Carbide End Mills
- Solid End Milling • General Purpose Solid Carbide End Mills
- Solid End Milling • High-Performance High-Speed Steel (HSS-E/PM)
- Solid End Milling • Burs
- Holemaking
- Holemaking • High-Performance Solid Carbide Drills
- Holemaking • Modular Drills
- Holemaking • Indexable Drills
- Holemaking • Modular Drills
- Holemaking • Indexable Drills
- Holemaking • Hole Finishing
- Tapping
- Tapping Portfolio
- Index by Order Number
- Index by Catalogue Number
- Global Contacts
- Informational Icons Guide
- Material Overview • DIN
Tapping Speeds
Factors when trying to determine the best tapping speeds: The method of feeding the tap, and the type of equipment
- Material to be tapped for driving, also infl uences the permissible speeds. If taps are
mechanically fed at the proper rate of advance, they can be
- Length of chamfer on tap
operated at higher speeds than if they are required to feed
- Percentage of full thread to be cut themselves and pull some part of the machine along with them.
- Length of hole (depth of thread)
Speeds may be modifi ed to take into account any or all of
- Pitch of thread these factors:
- Cutting fl uids
- Speeds must be lowered as length of thread increases
because, in deep thread holes, the accumulated chips
- Machine equipment
increase friction and interfere with lubrication.
- Horizontal or vertical tapping
- Bottoming taps must be run slower than plug taps.
| The best and most effi cient operating speeds for taps cannot be | • Tapping full height of thread calls for slower speed than if |
| calculated with the same certainty, as for many other metalcutting | the commercial 75% height only is required. |
| tools. | • Coarse-thread taps in the larger diameters should be run |
| With other tools, the feed per revolution can be set at any desired | more slowly than fi ne-thread taps of the same diameters. |
| point and can be varied as conditions demand. Taps, on the other | • The quantity and quality of cutting fl uid may affect the |
| hand, must always be advanced at a rate equal to one pitch for | permissible speeds as much as 100%. |
every revolution. The style of tap may vary the conditions.
- Taper threaded taps, such as pipe taps, should be
| For example, with a bottoming tap, the fi rst thread on each land | operated from 1/2–3/4 the speed of a straight thread tap |
| cuts the full height of thread, while, with a taper or starting tap, a | of comparable major diameter. |
number of threads do their share of the cutting before the full height of thread is reached. The depth of thread also varies, depending on the pitch. The coarser the thread, the greater the advance of the tap per revolution
and the greater the amount of material removed.
RPM Formulas
| SFM = Surface Feet per Minute | S m/m = Surface Metres per Minute |
| RPM = Revolutions per Minute | / = 3.1416 |
| IPM = Inches per Minute | mm/min = millimetres per minute |
| TPI = Threads per Inch | P = Pitch (1/number of threads per inch) |
Inch Sizes
| SFM | = | RPM x tool diameter | 0.26 x RPM x tool diameter or |
| 3.82 | |||
| RPM | = | 3.82 x SFM | |
| tool diameter | |||
| IPM | = | *P x RPM or RPM | |
| TPI* | |||
| Metric Sizes | |||
| S m/m = / x tool diameter x RPM | |||
| 1000 | |||
| RPM | = | mm/m x 1000 | |
| / x tool diameter | |||
| mm/min | = | mmPxRPM |