Обший каталог Yamawa 2016 - 2017 - страница 530

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Special Thread Taps / Simple Inspection Tools Spiral Fluted Taps (for blind hole) SIT Simple Thread Inspection Tools Spiral Fluted Taps (for through hole) Specification ■Specification of SIT is available up to M48 (U1 3/4). For details, please contact us. For icon explanation, refer to P.50 Spiral Pointed Taps (for through hole) TYPE：1 TYPE：2 TYPE：3 Hand Taps TYPE：4 TYPE：5 TYPE：6 Cemented Carbide Taps Roll Taps Product features ●SIT can minimize the jobs on inspection process and improve the inspection efficiency by adopting step screw thread. ●Premium HSS material extends the tool life dramatically. Special Thread Taps Simple Inspection Tools ●Tool for through hole or blind hole is available individually. ●Color case and color mark on the tool simplify tool storage control. Inclination ●What is the step screw thread ? Pitch diameter of first thread profile Pitch diameter of gauge thread profile 　YAMAWA new thread gauge（for through hole）has the step screw thread on its Pipe Taps end where the whole profile of screw thread becomes incrementally larger. Details of step ー Due to this feature, the gauge enters easily the internal screw and works screw thread efficiently particularly when checking the screw threads with fine pitches. Note : Step screw thread is not applied to the gauge for blind hole（NP gauge） Thread Mills Accuracy of SIT In SIT, tolerance of simple pitch diameter, pitch tolerance and tolerance of thread half Dies angle, 3 important factors on measuring internal screw threads, are same with those of thread plug gauge. ■Comparison between GB-6H/and GP-6H/thread plug gauge unit：mm ■Comparison between NB-6H/and NP-6H/thread plug gauge unit：mm Pitch Tolerance Pitch Tolerance OD PD tolerance for thread OD PD tolerance for thread Center Drills Size half angle Size half angle Basic Max Min Tolerance Basic Max Min Tolerance （±） （± minute） Basic Max Min Tolerance Basic Max Min Tolerance （±） （± minute） size size size size GB-6H 6.000 6.023 6.001 0.022 5.350 5.3675 5.3565 0.011 0.005 15 NB-6H 5.7055 5.7165 5.6945 0.022 5.500 5.511 5.500 0.011 0.005 16 M6 × 1 M6 × 1 GP-6H 6.000 6.023 6.001 0.022 5.350 5.3675 5.3565 0.011 0.005 15 NP-6H 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 simple pitch diameter. Pitch tolerance includes error of thread lead. The pitch diameter is simple pitch diameter. Pitch tolerance includes error of thread lead. Centering Tools ※Main specification of SIT is same with that of thread gauge. But SIT has partly Yamawa's own design in the length of thread and bottom part relief. Due to these features, Yamawa has adopted the name "Simple Inspection Tool or SIT" instead of using the name "thread gauge". JIS ST-3 526 For improvement, spec may change without advance notice.