I'd like to personally thank Philbert for encouraging me to put my HF grinder back into service. I use it primarily for lowering raker (depth gauge) height but it comes in handy now and then for other tasks. I still admire at how quiet it is because my ears need a break in the action now and then. My Oregon 511A is old and starting to sound like a tank as its motor bearings slowly give up.Summary (sort of) . . .
6 years and 16 pages (!), based on a taunting dare from a fellow member. At one point, I had 11 of these puppies in my basement, trying out different variations. I still refer people to this thread when they ask about HF grinders. So, here is sort of an interim summary. 'Interim', because I may get drawn down that rabbit hole again.
- These grinders are attractive due to their low price. But they also take up little space in use; are compact and portable to transport and store; and pretty quiet, compared to 'conventional' grinders. In a sense, they are 'cute'!
- They have limited power and limited adjustability.
- If you are satisfied with the 'standard', fixed angles, are mostly 'touching up' worn edges, and understand what a finished cutter looks like, you can absolutely improve chains with these tools. If you are planning on custom angles, fixing badly damaged chains, or setting up a sharpening service, keep looking.
- Many of these are of 'modest' quality (some are junk). Repair or replacement parts may not be available. Some of them are of decent quality, but those tend to cost more. Although, price and quality are not always linked, 'you get what you pay for', should be in the back of your mind.
- *The grinding wheels are critical*. Better wheels grind better. Some of the 'better' wheels cost more than some of the cheap grinders (!). Many of these grinders only accept 1/8" thick wheels, which means that you will need to reposition larger pitch chains (multiple passes) to get a 'proper' grind.
As with any grinder (or sharpening method), it takes some knowledge, some experience, and some skill to become competent and efficient. These could even be considered a low cost, fun thing to try, for less than the price of a couple of pizzas, movie tickets, etc., if you understand the limitations. I absolutely prefer my 5-3/4" Oregon / Tecomec grinders over these for regular use, but understand that the $200 - $300 price of these is more than some guys can justify. For some guys, filing chains is a better option.
Most of my 'HF-style' grinders have now been sold off on CraigsList or garage sales: I just was not going to use them. I did keep a pair of the Forester 04844 / Oregon 310-120 style grinders, with better quality wheels installed, for fun, light-duty use.
https://www.arboristsite.com/community/threads/forester-04844-chain-grinder.347765/
All that rationale stuff aside, my head still turns instinctively when I see one in a store, on-line, CraigsList, garage sale, etc. I have to remind myself that I am not running a museum, adoption shelter for grinders, etc.
Philbert
I suppose the man who gave me my HF about nine years ago would be proud to know that I have it in service again. He passed away last August after a long battle with colon and lung cancer. I repaired his chain saws for quite some time and this was his only way of paying me for my work.
Be careful outdoors this weekend, Philbert. The weather boys are talking about some really cold air in our neck of the woods, and you can safely expect about -20 F where you are. Burrrrr...