Cutting 8mm chain

No prob at all with a hacksaw and I've often cut chain like that; unless that is you are dealing with G80 or something like that.
 
Hacksaw will be fine. Would need some pretty heavy duty bolt croppers.
Or a grinder, but that risks spraying little fragments of hot steel everywhere. They will embed themselves in your gelcoat and weep rust forever.
 
I've done it with a hacksaw under water while dangling myself from a rubber dinghy. (We anchored where the HM said we could and picked up something on the bottom which no amount of effort would free us from, though it may have been 6mm chain).
 
I've done it with a hacksaw under water while dangling myself from a rubber dinghy. (We anchored where the HM said we could and picked up something on the bottom which no amount of effort would free us from, though it may have been 6mm chain).

Sawing underwater seems a good method to prevent flying rust ;-)
 
Hacksaw or a small angle grinder as long as you can secure the link firmly.
Laying the chain on something solid and applying a sharp cold chisel and a lump hammer will only take a few seconds. Wear eye protection.
 
Bolt croppers - not huge ones - did the job for me fairly easily, out on the pontoon, without the faff of putting a link in the vice to hacksaw it. In fact, I had already tried unsupported hacksawing and given it up as a bad job, before I thought of the croppers.

Actually, this is absolutely the only time in twenty years that I have ever used the croppers in anger and I was pleased to see them working so well. I have always been careful with them, cleaned regularly, liberally coated with grease and stored rolled in a greasy rag inside a dry plastic bag in the driest part of the boat, a cupboard above the engine.
 
I've cut chain several times out on my mooring when adjusting/relaying. There's no electric obviously so an angle grinder can't be used and the bottom is sand. I use a hacksaw and hold the chain by sticking a nail bar through the link and into the sand. It takes a couple of minutes to saw through a chain or shackle and the tools can easily be carried.
If I had bolt croppers, I'd probably try them but hacksaw works well for me.
 
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