Streamline Your High-Precision Tight Tolerance Hole Finishing with Engis Machines
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The new Engis Hybrid solution streamlines workflow by integrating single-pass bore finishing with a multi-stroke honing process in a single machine, thereby reducing the number of steps required to achieve tight tolerances and high precision when finishing bored components.
The new technology allows users to achieve exceptional precision when finishing bore components. It also produces sharper, burr-free corners on cross holes and metering edges within the part. The Hybrid can easily be automated producing up to 120 parts/hour.
This single-step system, designed for high-volume production of hydraulic cartridge valves and servo valve bushings, can finish hundreds of thousands of bores annually - transforming rough bores into finished products more efficiently and with greater throughput.
Contact us to discuss your requirements of Dual-Diameter Valve Honing. Our experienced sales team can help you identify the options that best suit your needs.
OP, what kind of use is this for?
Have the seats been cut or will they? No use putting in bigger valves unless the seats are enlarged. What about the guides?
I do work like this for my own use and do not have the greatest tools but it is not rocket science. Cutting OD or the backside is no worries. Cutting the 45 requires a real valve grinder for precision.
You will need to measure the seat diameter for each seat. Blue and some lapping compound may be needed to determine where the seat is. The diameter you need is the outer edge of the 45 cut in the seat. The valve 45 cut must be quite a bit wider, in both directions. Seats may not be all exactly the same. I find a magnifying head set from Amazon valuable.
Cut the valve diam to seat diam plus say 0.030" or so, others will correct me here. Then determine spring and stem installed height: If too low, cut the 45, top side down. If too high or correct, cut the underside. Margin must be at least 0.050 or so intake, a bit more on the ex side. The 45 cut on the valve must be wider than the seat contact by a good margin. The 45 seat contact width should be typically no less than 0.050 IN, maybe 0.070EX but no more than 0.080.
Valves should be lapped into the seats to check and ensure proper seal after cutting.
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