Общий каталог Widia 2017 - страница 693

• 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

Technical Information TopThread™ American Buttress (7° Pressure Flank Leading) NTB-A Inserts • Push Type Insert vs. Toolholder Orientation chuck chuck anti-clockwise anti-clockwise external internal rotation rotation 7º feed NTB-2RANTB-3RA NTB-4RA 7° pressure flankof the thread beingthe leading flank NTB-2LANTB-3LA7ºNTB-4LAfeed seatingseatingsurfacesurfacein barin toolholderinsert insert notch NTB-2RA 7° pressure flank notch NTB-3RA of the thread being NTB-4RA the leading flank NTB-2LA NTB-3LA NTB-4LA external buttress internal buttress 7° pressure flank leading 7° pressure flank leading Reference Dimensions Infeed Angle vs. Chip Load: 7° Pressure Flank Leading “A” reference .010" infeed .010" infeed nose radius .0052" .007" chip load D maximum .0039"chip load chip load .0012"chip load depth with “A” style insert 15º infeed angle 0º infeed angle feed direction feed direction insert D “A” ref. nose radius pitch based on NTB-A insert (inch) (inch) (inch) maximum radius NTB-2A .133 .024 .002–.004 16–20 TPI NTB-3A .171 .031 .005–.008 8–16 TPI NTB-4A .218 .049 .008–.012 4–6 TPI NOTE: For balanced chip load, 15° infeed angle is suggested. Internal Threading Limitations internal threading limitations internal threading limitations NTB-2A Buttress threading inserts NTB-3 and NTB-4A Buttress threading inserts TPI nominal minimum minor TPI nominal minimum minor thread size diameter thread size diameter (inch) (inch) 8 1-3/4 1.600 4* 2-1/2 2.200 10 1-5/8 1.505 5 2-1/4 2.010 6 2 1.800 12 1-1/2 1.400 8 1-3/4 1.600 16 1-1/4 1.175 10 1-5/8 1.505 20 1-1/16 1.002 12** 1-1/2 1.400 *NTB-4A insert only. **Can cut 16 or 20 threads per inch provided minor diameter is 1.375" or larger. Threads per Inch vs. Maximum Root Radius Chart (Inch) TPI 20 16 12 10 8 6 5 4 3 2-1/2 2 1-1/2 1-1/4 1 maximum root radius .0036 .0045 .0059 .0071 .0089 .0119 .0143 .0179 .0238 .0268 .0375 .0476 .0572 .0714 NOTE: Special Buttress forms are available upon request. widia.com F95