Company: Goodson Tools & Supplies
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Hyper-Finish Diamond Valve Guide Sizing System
GOODSON Tools & Supplies expands Hyper-Finish Diamond Valve Guide Sizing System to include six new sizes.
In response to customer requests, Goodson recently introduced six new mandrel sizes for its exclusive Hyper-Finish Diamond Valve Guide Sizing System. “These sizes are aimed at today’s cylinder heads with smaller valve guide bores,” says Goodson sales manager, David Monyhan. “The smallest size we offer now is 4.0mm, making them ideal for multi-valve heads.” Other sizes that have been added are 4.5mm, 5.0mm, 5.5mm, 6.0mm and 6.5mm. These are in addition to the original 7.0mm, 5/16˝, 11/32˝ and 3/8˝ mandrels.
According to Jim Tapp, Goodson Tech Services Manager, the diamond abrasive delivers a fine finish on even the hardest guides. “As guides continue to be made of harder and harder materials, traditional abrasives just can’t cut it anymore,” Tapp said. “We’ve tested the diamond abrasive on a variety of materials and it produced a 25 Ra finish in soft guides and between an 8 and a 10 in hardened guides.”
“One of the coolest features of the Hyper-Finish System is the adjustment range on the mandrels,” Monyhan said. “The mandrels allow for between .010˝ and .040˝ of adjustment (depending on the mandrel size) so there’s an almost infinite range for guide sizing.”
The key to the Hyper-Finish Diamond Valve Guide Sizing System is the driver head. It features a fully balanced yoke and body so that everything stays centered when in use. “You get a straight cut every time,” Tapp claims. “The other thing that makes the drive head a success is the easy-to-read adjustment knob. Each witness mark equals an increase in diameter of about .001˝.”
GOODSON offers this exclusive system in a Master Kit that includes four mandrel assemblies (7.0mm, 5/16˝, 11/32˝ and 3/8˝) that include both the mandrel and the abrasive along with the drive head, honing oil and valve guide brushes. Monyhan adds, “With the addition of the new mandrel sizes, we’ve decided to offer the customer the opportunity to make his or her own kit by allowing them to put any four mandrels in their kit. Everything else stays the same, though we will adjust the sizes on the valve guide brushes to correspond with their mandrels.
"Remember,” Monyhan continued, “mandrels are also available on an individual basis and replacement parts are available. If you don’t need the full kit, you can start small and work your way into new sizes as needed.”
One caution though, these abrasives will only fit these mandrels and these mandrels will only fit this driver head.
For more information about the Hyper-Finish Diamond Valve Guide Sizing System, go to www.goodson.com or contact the Goodson orderdesk at 1-800-533-8010.