36 THE DISTRIBUTOR’S LINK Barnaby Myhrum Barnaby Myhrum is an Applications Engineer at Applied Bolting Technology in Bellows Falls, VT. He has over 25 years of experience in engineering and manufacturing companies in roles as an engineer, manager, executive and consultant. He earned a Bachelor of Science in Mechanical Engineering from the University of Vermont, and a Masters of Business Administration from Carnegie Mellon University. He can be reached by email at barnabym@appliedbolting.com. MORE SPECIAL SQUIRTERS FOR SPECIAL PROJECTS Since 1994, Applied Bolting has manufactured and sold tens of millions of Squirter DTIs. They are used all over the USA, Canada, Central America, South America, throughout the Middle East and the Pacific Rim. Our standard product line encompasses imperial sizes ” through 1-1/2” in grades A325 and A490, and metric sizes M12 though M36 in grades 8.8 and 10.9. We also have sizes M36, M42 and M48 designed to serve the wind energy market. Occasionally we get requests for non-standard loads and sizes. We love solving problems for our customers, and we travel all over the world to do it. Sometimes the special request involves modifying the Squirter DTI dimensions to fit in confined areas. We’ve done this in sizes M24 through M36 grade 10.9 for numerous wind energy companies and for a provider a revolutionary space frame structural system in 1” and 1-1/4” grade A490. Other requests are for non-standard loads for special applications. Examples of this are for low-load 1” anchor bolts and M24 and M42 roof bolts for a mining application. In all cases our customers were aware of the benefits of using Squirter DTIs. They wanted to achieve the same level of quality assurance provided by Squirters in their non-standard applications. The roof bolts developed for the mining industry provide yet another example of the steps we follow to develop new products for new applications: 1. Define the desired Squirter inner and outer diameters, the minimum and maximum bolt preloads and the desired finish (plain, MG, Dac, etc.). 2. Define the installation details: will the Squirter be installed under the head or under the nut; are special washers required to accommodate oversized holes. 3. Design the DTI using Applied Bolting’s proprietary Bumpology to achieve the desired loads. 4. Manufacture or modify tooling to produce the Squirters. 5. Produce and test prototypes to verify proper load performance. 6. Select the squirt media fill levels to achieve DTIS (Drive it Till It Squirts). 7. Release design for full scale production. 8. Monitor and document manufacturing quality. 9. Ship the product and provide bolt installer training as necessary. The photograph below shows a few of the prototypes and finished products. We classify all of these products as Low Load High Visibility Squirters, and a patent is pending to protect the new technology. In one case the orange squirt media was hard to see in the dark, reddish underground conditions. No problem: we switched to a higher contrast green media. M42 Squirter Installed in a Roof Bolt Assembly (courtesy of www.rusmining.com.au) Specially Designed Squirter DTIs for Mining Roof Bolts please turn to page 159
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