GB1352876A - Finishing article and drive member therefor - Google Patents

Abstract

1352876 Abrasion tools NORTON CO 15 April 1971 9536/71 Heading B3D A finishing article 11, Fig. 3, comprises finishing material 15 on one side thereof, and a drive member 18 having a flange 20 and a hollow boss 22 permanently affixed on the other side thereof, the hollow boss defining a central opening at its outer end and having an annular lip 24 thereat formed to define an internal screw thread. The finishing material may consist of a disc or sheet of vulcanized fibres having abrasive particles 25, such as aluminium oxide secured thereto by a layer 27 of adhesive which may have a sand size layer 29 to move firmly bond the particles 25. A cloth disc 16 may be secured to the other side of the material 15 by a layer 33 of polyvinyl acetate; and the drive member 18 secured to the cloth disc 16 by a thermoplasticthermosetting adhesive 37. The adhesive engages a metal flange 20 of the drive member which is formed with the hollow boss having its lip 24 curved to form a peripheral shoulder 26 and broken at 28 to form the screw thread. The finishing article 15 can be mounted on a support member 12, Fig. 1, having a shaft 13 for engagement with a power tool. The support member has a cylindrical core 30, Fig. 4, formed with a bore 32 into which is press fitted a stud 36 at one end formed with threads 40 and at the other end being integral with or, as shown, provided with a spindle 48. The threaded end 40 of the stud projects into a larger bore 39 in the core 30 which receives a socket 41 having a thread for engaging the threads 40 and a hollow 55 for receiving the boss 22 of the finishing articles which is threaded on to the threads 40 until its end abuts the end 57 of the hollow. A body portion 56 of a support component is moulded around the core and has a layer 54 of fabric, such as neon-impregnated cloth, secured to its lower surface. The boss 22 acts as a female component in receiving the stud 36 and as a male component in entering the socket. In another embodiment, a support pad 62 has a central core member 64, Fig. 5, threaded on to the projecting stud 68 of a power tool 88. A washer 92 spaces the core member from a socket 76 which is disposed in a recess 70 in the pad, the socket being screw-threaded on the stud and having a recess 84 for receiving the boss 22 of a finishing article which also is threaded on to the stud.