This Part of BS 3876 specifies requirements for vertical spindle rope pulleys, mountings and assemblies intended for use in colliery track haulage.
NOTE 1. Where the word 'vertical' is used in this Part it refers to the installed position of the spindle.
This Part of BS 3876 applies to:
(a) pulleys, supplied without mountings, with throat diameters less than 300 mm;
(b) mountings; and
(c) pulley assemblies that comprise both the pulleys and the mountings.
The pulleys to which this Part applies are those intended to be used to deflect the haulage rope horizontally through small angles around each pulley (i.e. up to about 10°,see appendix C) from its straight line direction of travel.
NOTE 2. Appendix A gives the information which should be supplied by the purchaser, in his enquiry and/or order for pulleys, mountings and assemblies in accordance with this Part of BS 3876.
NOTE 3. Appendix B gives the information that will be required by the purchaser, to be supplied by the supplier, prior to the supply of pulleys, mountings and assemblies in accordance with this Part of BS 3876.
NOTE 4. Appendix C gives general recommendations for the design and operating speeds for colliery track haulage pulleys with vertical spindles.
NOTE 5. No inspection requirements are specified in this Part of BS 3876. However, a typical requirement that a purchaser may choose to write into his order or contract for pulleys, mountings and assemblies to this Part is given in appendix D.
NOTE 6. The titles of the publications referred to in this Part of BS 3876 are listed on the inside back cover.
BS 3876-2:1990 history
0000 BS 3876-2:1990(2011)
1990BS 3876-2:1990 Rope rollers, pulleys, mountings and assemblies for colliery track haulage - Specification for vertical spindle pulleys, mountings and assemblies