Cutwel offer 6 holders for £99, which is a pretty good price – and they don't sell cr4p. They seem to come in 3 flavours, each with a DIN spec. I bought a load of ISO40 holders – mix and match different sizes:
- DIN2080 (aka ISO30/ISO40/ISO50)
- DIN69871 (aka SK30/SK40/SK50)
- DIN69893 (aka HSK50/HSK63/HK100)
If you have an imperial thread, it might be NMTB30/40/50 which seems to be the imperial version of ISO30/40/50.
The main problem with Cutwel may be that they may not ship to your region. It all depends on what exclusivity agreement they have with their suppliers. They refused to ship to me when I lived in Canada because a Canadian supplier had that sales territory for Korloy. Instead I got stuff shipped to my mum's and took it from there.
Murray
PS: to be certain, look up the DIN specs to check the key dimensions. Above all, check if imperial or metric. If it's metric it will surely be one of the DIN stds. If it's imperial it may be one of the myriad US specs, with different names etc.
I'm pretty certain you won't want an ISO30 holder if your machine takes an SK30. ISO30 and NMTB30 have a long parallel shank and the drawbar is correspondingly shorter.
Edited By Muzzer on 15/02/2017 13:27:46