1/2" arbor 6 ft-lbs
3/4" arbor 22 ft-lbs
1.0" arbor 45 ft-lbs
1.25" arbor 55 ft-lbs
1.5" arbor 55 ft-lbs
2.0" arbor 60 ft-lbs

Unless specified, yes our shell mill tool holders are coolant compatible. In most cases the company supplying the coolant thru shell mill will provide you a proper arbor screw that supports coolant thru and will adapt properly to the specific shell mill that you have. Every shell mill is different so we cannot provide a proper coolant thru arbor screw for every situation. In case they did not provide such a screw we recommend simply grinding or milling a flat on the arbor thread screw that you plan on using. Even a .03 deep flat will allow plenty of coolant flow and will not reduce strength or function of the screw. Second option is to drill 2 intersecting holes in the screw like a banjo bolt.

Yes the drive keys can be easily removed. Spare drive keys can also be purchased if yours are damaged or lost. Please contact sales if needed.