Spiralock - Specialty Fasteners & Components Ltd

1 Spiralock .. The edge is in the wedge Threading Tools Product Specifications AS9100 REV B and ISO 9001:2000 Certificate Number: FM77129 1 Internal Locking Thread Form Spiralock On the following pages you will find information on Spiralock Tooling Products. The majority of the products listed in this catalog are available for prompt shipment.

2 If for any reason your required thread size is not listed in this catalog, please contact our offices at (800) 521-2688 or send an email to We are able to supply and/or design any tool your application may require. For additional information on Spiralock technology, products and applications, please visit our website, TABLE OF CONTENTS: Product Introduction .. 2 Things to Know About the Spiralock Thread Form .. 3 Tooling Product Offering .. 5 Tap 6 Tap Styles .. 7 Standard Tap Blanks .. 8 Drill Sizes for Cut Tapping Metric .. 10 Drill Sizes for Cut Tapping Fractional.

3 11 Hole Sizes for Cold Form Tapping Metric .. 12 Hole Sizes for Cold Form Tapping Fractional .. 13 Recommended Gaging Practices .. 14 Taps & Gages - Metric .. 16 Taps & Gages Fractional .. 24 Thread Milling Cutters .. 33 Carbide Inserts .. 34 2 Product Introduction Spiralock WHY USE Spiralock THREAD FORM? Prevents threaded joints from coming loose Reduces overall cost of threaded joints Eases assembly, thus reducing assembly time Improves joint fatigue life Keeps your customer happy and eliminates warranty claims WHERE TO APPLY Spiralock ?

4 Any hard joint Thin gasket application HOW TO APPLY Spiralock ? Replace standard threaded hole with the Spiralock thread form and eliminate the need for other thread locking devices! Spiralock Corporation has re-engineered the standard (female) internal thread form and added a unique 30-degree wedge ramp at the root of the thread. This unidirectional internal thread form, called Spiralock , mates with standard 60-degree male thread Fasteners . The wedge ramp allows the bolt to spin freely relative to the female threads until clamp load is applied.

5 At that point, the crests of the standard male thread are drawn tightly against the wedge ramp, eliminating radial clearances and creating a continuous spiral line contact along the entire length of the thread engagement. This continuous line contact spreads the clamp force more evenly over all the engaged threads, improving joint fatigue life as well as the integrity of the threaded joint. 3 Things to know about the Spiralock Thread Form Spiralock MATES WITH STANDARD MALE FASTENER The Spiralock thread form is designed to mate with a standard 2A/3A fractional or 6g/6h metric male fastener.

6 TORQUE/TENSION RELATIONSHIP The Spiralock thread form design creates a helical line of contact between the crest of the bolt threads and its 30-degree wedge ramp. In order to generate similar joint tension as compared to 60-degree threads, the Spiralock threaded joint generally requires 10% - 20% greater torque due to the brinelling of male and female threads as well as the slight elastic deformation of the male thread. Although higher torque is required in all Spiralock threaded joints, the increase in required torque will vary depending on the types of materials being used (nut, bolt, joint, etc.)

7 This torque/tension relationship should be evaluated in the actual joint to determine the proper torque required to develop the specified tension. Static testing by the Goddard Space Flight Center has shown that Spiralock offers a very consistent pattern of friction, especially when the threads are lubricated. Specifically, non-lubricated Spiralock threads had a coefficient of friction or k-Factor range of , while lubricated threads had a k-Factor range of Spiralock s more consistent friction factor directly relates to a more consistent joint tension or preload.

8 RESISTANT TO VIBRATION LOOSENING Test Parameters: -28 nut run @ 1200 cycles/minute of transverse movement with + amplitude. Goddard Space Flight Center determined that the Spiralock thread form was the only product that could withstand the vibrations imposed by the Space Shuttle's solid rocket boosters. The most severe vibration tests did not loosen the nuts when they were subjected to both high amplitude sine and random tests, even tests that were ten times the specifications for the Space Shuttle did not loosen the Spiralock Fasteners .

9 Title05001000150020002500300035000 102030405060708090100110 Time (seconds)Tension (lbs.)Extensive testing on Junkers transverse vibration equipment has proven that the Spiralock internal locking thread form outperforms other thread locking devices. In fact - unlike other locking devices, which lost preload within the first minute of testing - Spiralock remained tight until the bolts failed due to fatigue. SPL NutAll Metal PT Nut 4 Things to know about the Spiralock Thread Form Spiralock LOAD DISTRIBUTION Research studies performed by Lawrence Livermore National Laboratory, Massachusetts Institute of Technology and others have confirmed that the load carried by Spiralock threads is much more uniform than the standard 60-degree threads.

10 Additionally, they show that the percentage of load on the first engaged thread produced with a Spiralock tap is significantly lower, 24% versus 64% with five thread engagement. Spiralock Thread Standard 60 Thread The uniform thread loading eliminates the load concentration at the first engaged thread, thereby reducing joint failures due to shearing and improving product performance. Furthermore, the Spiralock threaded joint eliminates transverse motion that causes loosening under vibration.