THREADING LINES
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ISCAR THREADING LINES Metric and Inch Catalog

THE STANDARDS INSTITUTION OF ISRAEL Quality Standard ISCAR has been certified by the prestigious Standards Institution, as being in full compliance to ensure delivery of the finest quality goods. Quality control facilities include the metallurgical laboratory, raw metal testing, an online testing procedure and a machining center for tool performance testing and final product inspection. Only the finest products are packaged for entry into ISCAR’s inventory. THE STANDARDS INSTITUTION OF ISRAEL THE STANDARDS INSTITUTION OF ISRAEL THE STANDARDS INSTITUTION OF ISRAEL THE STANDARDS INSTITUTION...

As a manufacturer of cutting tools, our main objective is to ensure optimal production with the most advanced and high-performance tools that meet the requirements of modern technology. Machining the thread faster and more accurately reduces processing time and cost, and also lowers the possibility of manufacturing defect parts. Although the cutting tool is often considered to be of minor value, it is the key to increasing productivity and quality. At ISCAR we understand this fact well, and our ongoing research and design activities are aimed at creating cutting tools that will improve...

THREADING CATALOG Thread Turning

THREADING CATALOG

THREADING CATALOG Thread Milling Pre-Thread Drilling

A lot of things around us, whether it be everyday objects or industrial products, have a thread connection. The history of thread connections began many years ago. The first fastening parts with threads were used in ancient Rome. However, due to the high cost, they were only used for jewelry, medical instruments and other expensive products. Bolts and nuts were widely used in the 15th century. They connected the mobile segments of armor and parts of watch mechanisms. The first printing machine, invented by Johannes Gutenberg between 1448 and 1450, had threaded connections - its parts were...

Pitch / Threads Per Inch (TPI) Pitch and Thread per Inch (TPI) define the same threading feature, only in different terms. = helix angle P = thread pitch Dpitch = pitch diameter (effective diameter of thread) ≈ 3.142 π Pitch - a main and common parameter for all types of metric threads, usually expressed in millimeters. Pitch defines the distance along a line parallel to the axis of the thread length between the sides of the thread profile placed in the same axial plane on one side of the axis of rotation. Pitch for Metric Threads pitch Thread per Inch (TPI) - a main and common parameter...

Thread Classifications Threads can be classified by the following criteria: Gender Depending on the location of the surface, the thread may be external (cut on a rod) or internal (cut into a hole). External Thread Internal Thread Pitch Thread pitch can be classified by “coarse pitch” and “fine pitch.” The terms refer to the size of the threads relative to the screw diameter and do not imply differences in thread quality, tolerances, or cost. They can be compared as follows: Coarse Pitch • Fewer threads per axial distance. • Larger thread form relative to screw diameter. • More resistant to...

Thread profile, also called thread form, which refers to the cross-sectional shape of a thread. It may be square, triangular, trapezoidal, or other shapes. According to the number of starts, the threads are divided into single-start and multi-start threads. A single-start thread has one continuous thread running along the body of the screw. A multi-start thread consists of two or more intertwined threads running parallel to one another. The lead distance of a double-start thread is twice that of the single-start thread and a triple-start thread has triple that of the single-start thread....

Thread Classifications Thread surface shape coarse pitch fine pitch

Thread Standards To ensure the interchangeability of threaded products for the main parameters of thread profiles, it is necessary to set the appropriate standards. The Most Common Standards According to Their Purpose Machinery and General Use ISO NUT REmax 0.18042TP REmin 0.15011TP SCREW Trapezoidal Worm Threads for Power Transmission Acme Stub Acme American Buttress SAGE - Metric Buttress NUT TP Oil & Gas Industry for Pipes and Couplings Exteme Line Casing API Pipe Threads (connection, Fittings and Sealing) BSPT NPT NUT Fire Fighting and Food Industry Pipe Couplings RND 0.22105TP...

Thread Accuracy In thread manufacturing, permissible limits are defined for the actual thread profile’s deviations from the theoretical thread profile. To ensure correct threading operations, the thread profile cannot cross the theoretical profile, and therefore, this permissible limit is set by tolerances. The external and internal thread should only contact the sides of the threaded profile, therefore the main parameter that influences thread tolerance is the pitch diameter. Tolerances on major and minor diameters are set in such a way as to exclude the possibility of collision on the...

external (screw) threads more precise Basic Size pich diameter minor diameter pich diameter minor diameter more precise Possible Combinations of Thread Tolerances: pich diameter major diameter pich diameter major diameter pich diameter major diameter pich diameter major diameter Thread accuracy can be classified by three classes: fine, medium, and coarse, depending on the length of thread engagement (the length of interaction between the fastener and nut member (i.e. nut or mating material for the screw) which is divided into three groups: short, normal, and long. lE - length of thread...

Recommended Tolerance Classes for Internal Threading Tolerance Class Fine Medium Coarse Recommended Tolerance Classes for External Threading Tolerance Class Fine Medium Coarse Position E normal long ----6e 7e6e 8e 9e8e Position F normal long ----6f ------- Position H normal long 4h 5h4h 6h 7h6h ----- ** bold - most common There are several options for thread description with accuracy class according to the ISO standard: Internal Threading Major Diameter Tolerance Class for Pitch Diameter Tolerance Class for Pitch and Minor Diameter Tolerance Class for Pitch Diameter Tolerance Class for...