Expansion Shells

Physical Properties

Bolt Diameter	Thread Form	Nominal Hole Diameter	Shell Length	Wedge Length	Net Weight
mm		mm	mm	mm	kg
16	M16	26	54	41	0.12
16	M16	30	54	50	0.15
20	M20	35	83	54	0.24
24	M24	45	83	57	0.60
22.7	U227	45	83	57	0.60

General Features

DSI expansion shells hold in any rock strata which is sufficiently competent to provide adequate anchorage. They are designed to anchor in soft ground or hard rock. In good strata the anchorage exceeds the ultimate strength of the steel bolt. All expansion shells require competent strata in the anchor zone. The suitability of the anchorage and the specific expansion shell to be used is best determined by physical load testing.
DSI expansion shells feature parallel contact with the hole wall, with sharp serrations on the outside leaves that ensure positive holding power.
The expansion shell assembly is securely held by a strong protective sleeve, to save installation time and prevent loss of parts while handling. The sleeve must be removed prior to installation.
Corrosion protection may be provided by hot dip galvanizing (refer to Section G) or zinc plated to AS1789-1984

Packaging

All 16mm expansion shells are contained in cardboard boxes then packed on pallets.

Notes

Only DSI rock bolt components should be used in order to obtain optimum performance of the bolt system.
DSI's Mining Products Division is Quality Assured to ISO 9001:2000, Registration No.QAC/R61/0315.

PRINTED December 2006: All dimensions, weights, quantities and specifications are those applicable at the time of publication and may be amended from time to time.