Walter Expands the Range of its Paradur and Prototex Taps
The Walter Paradur® and Prototex® taps are the aerospace specialists for threading titanium and nickel-based super alloys.
Posted: September 25, 2024
Walter has expanded the range of its Paradur Ti Plus and Paradur Ni 10 and Prototex TiNi Plus tap lines, specifically by increasing its existing portfolio for J profiles with extensive new dimensions. Screw threads with J profiles feature a root radius, which improves the tensile stress area of the fastener and helps reduce the stress concentration factor in the thread to make the thread stronger. The minor diameter of J-profile threads is curved to minimize stress points created by sharp edges or corners, which can break due to vibration. Threads with the J profile are particularly preferred in the aerospace industry for difficult-to-machine materials.
Paradur Ti Plus and Prototex TiNi Plus taps are now available to produce UNJC4 – UNJC3/8, UNJF6 – UNJF5/8 and MJ3 to MJ10 thread sizes, and the Paradur Ni 10 taps are available to produce UNJC4 – UNJC3/8, UNJF6 – UNJF7/8 and MJ3 to MJ6 .
The Paradur Ti Plus taps are for threading blind holes with a geometry specially developed for machining titanium alloys with a tensile strength of at least 700 N/mm2 using emulsion instead of oil. The tool has a wear-resistant, titanium-free ACN coating to prevent built-up edge, a 15° helix angle with chamfer form C, and an enlarged core diameter for a high level of stability and process reliability. The Paradur® Ti Plus tap performs up to 2×DN in the standard range. Potential benefits include a high level of process reliability because of elevated tool stability, long tool
life because of the hard coating and stable cutting edges that prevent fractures.
The Paradur Ni 10 taps are also for threading blind holes. Walter specially developed the geometry for tapping nickel-based super alloys, such as Inconel 718, with a tensile strength up to 1,450 N/mm2. The uncoated tool is also cost-effective when tapping stainless steel with difficult cutting properties and steel with a tensile strength from 1,200 to 1,600 N/mm2. The cutting edges are stable due to the reduced 10° helix angle in the chamfer section. The usable length is up to 1.5×DN in the standard range.
The Prototex TiNi Plus tap is effective for through-hole threading. Walter specially developed the geometry to thread titanium and nickel-based super alloys (ISO S material group) with a tensile strength of 700 N/mm2 or higher using emulsion. It provides effective depths to 2×DN in the standard range. In addition to aerospace components, the Prototex TiNi Plus tap excels threading components for the medical device industry.
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