This optional sheath is specialized for two reasons – it is both “heavy duty” and “non-conductive”.
Square Drive Shafts and Heavy Duty Sheaths:
Square drive inner shafts require a heavy duty outer sheath. Foredom motors equipped with this style shaft and sheath have the letter “H” added to their part numbers. You can purchase square drive versions of an M.SR, M.TX , or M.LX that come equipped with square drive shafts and sheaths. These motors have the part numbers M.SRH, M.TXH or M.LXH. Or you can remove a key tip shaft and sheath from your Foredom motor and install square drive shafting.
Square drive flex shaft machines are considered the ultimate power tools for deburring, buffing, grinding, polishing, and metal finishing with larger rotary accessories. They are ideal for large scale woodcarving and sculpting jobs with carbide or steel burs and larger mounted grinding stones.
Keep in mind:
1. they connect ONLY to our four ‘square drive’ handpieces – H.25H, H.30H, H.28H and H.44HT and CANNOT be used with any of our 17+ standard key tip connection handpieces, and
2. the sheathing material is stiffer and less flexible than the standard type.
Non-Conductive Shafts and Sheaths:
This sheath was developed by our engineers for equine dentists and other users who may work in damp environments. It has plastic connectors in place of some of the metal components to prevent the flow of stray current down into the handpiece.