Общий каталог Yamawa 2022 - 2023 - страница 690

⑦ Special Thread Taps / Simple Inspection Tools Overall length L Thread length ℓ Thread + Neck length ℓn ℓs Shank length Shank dia. Ds Size of square K Length of square ℓk JIS SIT For GO（GB） Spiral Fluted Taps (for blind hole) ① JIS Simple Thread Inspection Tools For NOT GO （NB/WB） Spiral Fluted Taps (for through hole) ② Specification ■Specification of SIT is available up to M48 (U1 3/4). For details, please contact us. Spiral Pointed Taps (for through hole) ③ Hand Taps ④ Angle Product Features Pitch diameter of the gauge ●Blue color for GO and red color for Not Go are used for easy identification and storage. Pitch diameter of the tip ●Utilizing a high grade of HSS material, the guage life has increased significantly. Cemented Carbide Taps ●By using a stepped threads or tapered threads design at the front end of screw thread ⑤ section, the problems in inspection were reduced while the work efficiency was improved. Tapered screw The tip of SIT gauge is easy to insert into an internal screw thread as the thread height thread details. gradually becomes larger. This is particularly effective when inspecting fine pitch threads. ●Note: Stepped threaded design is not used for Not Go. Go and Not Go notations Roll Taps ⑥ These notations conform to the "gauge symbol" of JIS standards. ■Metric thread ■Unified thread Type of Thread Thread Element Types of Screw Limit Gauges Guage Symbol Type of Thread Thread Element Types of Screw Limit Gauges Guage Symbol GO screw plug gauge GP GO screw plug gauge Internal Thread Pitch Diameter GP Not GO thread plug gauge NP (common for both work and inspection) Internal Thread Pitch Diameter Special Thread Taps Simple Inspection Tools Not GO thread plug gauge for work WP The "SIT and SITD" have different dimensions like the length of the screw thread portion and ⑦ the relief shape of the threads root with respect to plug gauge, GP / NP is not used for GO use Inspection type thread plug gauge IP and GB is for NOT GO NB. For unified screw threads, for GO gauge use the GB and for a NOT GO guage use the WB. Both metric screw threads and unified screw threads are Internal pitch diameter gauge manufactured in accordance with JIS standards. For a reference Metric Thread Unified Thread GP NP GP IP WP point: the metric screw threads have been specified to be consistent For internal GO screw plug gauge. Not GO screw plug gauge. Plug Gauge for inspection. inspection. Not GO screw plug gauge for Not GO screw plug gauge for work. Pipe Taps thread diameter with ISO while the unified screw threads have been specified as it ⑧ Tolerance domain was before the introduction of ANSI standard. Thread Mills Premium Thread Mills 6H 2B ⑨ Accuracy of SIT The single pitch diameter tolerance, the thread pitch tolerance and the threads half angle tolerance are important in the internal thread accuracy measurement and are manufactured using the same accuracy of thread plug gauges. Dies ■Comparison between the screw thread "GB-6H" and the ■Comparison of Not GO thread portion "NB - 6H" and Not GO ⑩ screw thread plug gauge "GP-6H". Unit：mm screw plug gauge "NP - 6H". Unit ：mm Thread Thread Major Diameter Pitch Diameter Pitch Tol. Half Major Diameter Pitch Diameter Pitch Tol. Half Size Angle Tol. Size Angle Tol. Criteria Basic Criteria Basic Max Min Tol. Max Min Tol. （±） （± Min.） Max Min Tol. Max Min Tol. （±） （± Min.） Inch Dia. Inch Dia. GB-6H NB-6H 6.000 6.023 6.001 0.022 5.350 5.3675 5.3565 0.011 0.005 15 5.7055 5.7165 5.6945 0.022 5.500 5.511 5.500 0.011 0.005 16 M6 × 1 M6 × 1 Center Drills Centering Tools ⑪ GP-6H NP-6H 6.000 6.023 6.001 0.022 5.350 5.3675 5.3565 0.011 0.005 15 5.7055 5.7165 5.6945 0.022 5.500 5.511 5.500 0.011 0.005 16 M6 × 1 M6 × 1 The pitch diameter is a single pitch diameter tolerance. The tolerance of the pitch also includes The pitch diameter is a single pitch diameter tolerance. The tolerance of the pitch also includes the deviation of the lead. the deviation of the lead.  The screw thread precision is the same as a thread gauge, but some of the specifications like length of screw thread portion and the relief shape of the thread root are originated by YAMAWA. Therefore, these gauges are not to be called "thread gauge" and distinguished as "simple inspection tools for internal screw threads". JIS ⑦-45