Also, all seats have a fully finished inside diameter to assist gas flow and swirl. Q, N, and S series inserts are individually cast and have a true radius on the lead-in edge to facilitate the press fit. A cobalt-based alloy used in a very limited range of specialized applications where additional abrasion resistance is necessary. Our austenitic (non-magnetic) nickel-based alloy designed for natural gas, LPG, propane, and other extreme heat applications.ĭenoted by the suffix "N". All 20- and 21- prefixes without a suffix are cast in Q material. I'll re-examine the fitting when I have a moment - but tomorrow we're invited to our son's house to meet his in-laws, so I expect I'll be on duty preparing for this encounter.īy the way, do people make remarks to you about Beowulf? And do you live in the fens? "Forth from the fens, from the misty moorlands, Grendel came gliding, grim wrath he bore.Our high-chrome alloy designed for unleaded fuels which enables Rockwell Rc40 hardness combined with easy machinability.įeatures excellent resistance to high temperature corrosion in applications to 1150☏. I'm resigned to just opening up the head and pulling out another few inches of cord when it wears down. Next job is to prepare for planting - bean poles and removing weed fabric from a few beds.īut all is not entirely good with the strimmer - for some reason the cord doesn't feed out when I bump the head. After an hour of strimming I have trimmed down the worst on the path adjacent to Colin's plot. The weeds were about knee high everywhere - we've had guests last weekend and it's rained a lot, so you can imagine the result. So I headed off to the plot without delay. It works fine as a result - doesn't wrap itself round the head at all. I also cleaned out some old strands of vegetation that has accumulated. Some success! I took the head apart and rewound it a bit looser, and I limited the amount of cord out to 4" as you said.
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