Standard air motors are not normally designed for a drill chuck or collet and the high shaft loading of drilling, grinding or operations.
So, Deprag offer some motors made especially for these applications.
Drills are available in the power of 80W, 170W, 250W, 400W and 600W, with drilling capacity in steel of upto 13mm, max speeds of upto 24,000rpm. Most of these motors are available with a collet holder or a drill chuck.
Milling and grinding motors are now available in 150W, 250W, 300W, 400W, 700W and 1,000W with speeds from 15,300rpm up to 47,000rpm.