rotating rotation of the cutting bit 40 promotes even wear and reduces the likelihood of premature bit failure a more detailed view of the seal 60 is shown in fig3 and 4 according to one embodiment of the present invention fig3 shows a top face 130 of the seal 60 the top face 130 of the seal 60 may have a top surface 132 which seats against the shoulder 36 of the wear sleeve 30 a bottom surface 134 of the seal 60 may seat against the shoulder 22 of the support block 22 the annular distribution channel 90 which is in the bottom surface 134 of the seal 60 opposite the depressions 136 receives fluid from fluid passage 80 of the support block 20 as mentioned above openings 136 intersect the annular distribution channel 90 at one or more locations the openings 136 extend to the top face 130 of the seal 60 and transfer fluid from the annular distribution channel 90 to the fluid conduit 34 in certain respects the seal 60 is made from polyurethane nitrile rubber fluoroelastomer ethylene propylene natural rubber silicone rubber poly tetrafluoroethene ptfe polyoxymethylene and like material in other respects the seal is a metallic material although the seal 60 is shown as an annular ring coaxially.