Corner Pulley

Corner Pulley

The problem, and what changes

Until the Corner Pulley, a scraper could not be taken around a 90° corner. The turn was where cleaning stopped: material built up, restricted scraper movement, damaged air and water services and eventually held up production, and the only answer was another winch on the other side of the corner. This is not a refinement of an existing method — it is a capability that did not exist. The Corner Pulley gives the rope controlled, stable guidance through the turn, so one winch cleans multiple panels around it, gulleys are established from the first blast in ledging, and production carries on through the corner instead of stopping at it.

Underground application

90° corners in ledging, board & pillar and pillar mining
Gulley and ASG intersections
Finger raises
Slusher gulleys
Any layout where a winch per panel is not possible

Watch it running

Our equipmentCorner Pulley — surface demonstrationA surface rig, not an underground panel — set up so the rope path through the turn can actually be seen. There is no “before” clip to put beside this one: until the Corner Pulley, a scraper could not be taken around a 90° corner at all. The turn was simply the point where cleaning stopped.

Trialled and tested

Anglo American PlatinumNow Valterra Platinum. Approved for use. Proof of concept and production trial completed at Amandelbult, Tumela 16 West Shaft.2016

Sibanye-StillwaterStock item.2018

CSIR destruction testingCertificates T14201–T14204. Four units carried 634.89, 672.85, 729.67 and 804.13 kN against a 400 kN specification minimum.SANS 1819

Specifications

Scraper attachments: Required. Sold in sets of two, fitted to the mine's existing scraper — whether one part of the system is used or all three.
Assembly: Left- and right-hand snatch blocks on a 1 150 mm spreader beam, both swivelling in both directions. Integral toolbox.
Safe working load: 10 tonne, referenced to SANS 1819:2006
Mass: 82.5 kg assembled — 33.9 kg per snatch block, 11.8 kg spreader beam

Sheave: Ø230 mm from solid EN8 bar, on two 7208 bearings per block
Materials: S355JR plate; VRN400 abrasion-resistant arms; EN8 shafts and sheave stock
Rope: Sized for Ø19 mm scraper rope
Engineering: SB-GA-00 Rev 0, issued for fabrication 9 June 2025; signed off by a registered professional engineer 7 July 2025

Patent & design: ZA 2016/01725 (D0309ZA) · ZA 2006/09906 (P0018ZA)
Design life: 6 months · 3-month warranty
Suggested spares: Defined spares set per system
Implementation: 1 month underground with your crew

Download the spec sheet PDF · 2 pages

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