Whetstones tend to break when you drop them on hard things. My bregenzer stone broke some months ago. Okay, it didn’t break, I broke it. Thankfully it’s the only one I’ve ever broken so far.
I don’t tend to use it much for field mowing anymore, as the rozsutec stones are finer and seem to suit the fine edges of the Falci blades better. But the bregenzer is a good intermediate step between a coarse stone and the very fine rozsutec, when I’m preparing a blade for a customer, so I like to keep it in action.
I glued it together with a two part mix, which did a good job. It held out for months until a couple of days ago; I left the join submerged in the whetstone holder, which seemed to have weakened the glue and it broke again while I was honing. So I glued it together just now, and took some pics to give you some ideas.
The glue I used is “Bondmaster E32”, a two part epoxy. “Golf bond” was a similar product, and was used to glue the heads of golf clubs onto their shafts – not sure if it’s still around. We use the stuff to glue fibreglass fingers into vibrating heads on a harvester. A tube costs significantly more than a new whetstone, so it’s not something I’d recommend buying specifically for this purpose. But if you’ve got a broken whetstone, and you’ve got some half-decent glue around, which will work on porous surfaces, it’s worth a try – I’ve got months of extra use out of mine by repairing it.
Do keep in mind that the join may give way, but if you’re using a safe honing method you’ll be working away from the edge anyway.
~~ Also, Ashley Vido has pointed out that another great (and lower tech) option is to heat a bit of poly pipe and force the stone into that – poly handle! ~~