HALDER Main catalog standard parts Strana 941
Nabídka komerčních zákazníků **Nejlépe prodávané z HALDER Normalien
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Technical Appendix Torques POLYAMIDE THREAD LOCKINGS POLYAMIDE SPOT COATING AND ALL-AROUND COATING IN COMPLIANCE WITH THE REQUIREMENTS OF DIN 267, PART 28 Description Polyamide spot coating is a plastics material which is applied onto a part of a thread and which develops a clamping effect when screwed in. The axial play existing between the screw thread and the nut thread is filled up by the Polyamide material. Thus, a high surface pressure between the opposing uncoated flanks of the threads is achieved. This connection prevents a loosening of the threaded parts when subject to dynamic load. Dimensions and designation Clamping thread lockings include all-around coatings, spot coatings and strip coatings. Standard version - DIN 267, part 28 If not specified otherwise, the coating is located within a linear range of 1,5 x d ± 2 P for P < 1 and 1,5 x d ± P for P ≥ 1 measured from the tip of the screw.The first 2 or 3 threads remain uncoated in order to facilitate the screwing-in procedure. 2 to 3 thread turns almost free from coating d = nominal diameter P = thread lead Versions with coating in special length or in special place The measurements lo and a must be stated in your order. Polyamide spot coating is a favourably priced method of counteracting a self-loosening and self-releasing of screws and threaded parts. By applying Polyamide spot coating, a connection is created which can be released at any time while maintaining its locking effect even after a repeated insertion or removal of the screw. lo = length of coating a = position of coating from screw end P = thread load For lo and a, the tolerances ± 2 P when P < 1 and ± P when P ≥ 1 apply. Properties Field of application M 3 - M 16 Polyamide spot coating can be applied onto screws and threaded pins made of steel or stainless steel. This method is suitable for galvanic as well as organic/ anorganic surface treatments. • Reusable (up to 5 times). • Temperature-resistant from - 50° C up to + 90° C, for short intervals up to + 120° C • Unlimited shelf life • The screw and the locking element form a unity • Forgetting to apply the locking element does not happen any more • Mounting aid (red or blue colour) • Can be inserted immediately - no cure time • Resistant against almost all aggressive substances (documentation can be made available on request) • Polyamide spot coating can be adapted to suit specific requirements 941 13
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