Friction stabilizers provide instant ground support through a single pass installation process. They are made from high tensile steel formed into a tubular shape with an opening along the length. When installed into a drilled hole, the compression of the tube against the tighter hole generates friction resisting pull-out. Friction stabilizers can be tested after installation and are used with a range of plates and tools to provide flexible ground support.

1. Friction stabilisers provide
instant ground support and
offer the advantage of a single
pass installation.
A Division of Fero Group
1.1 Friction Stabilisers

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All specifications are applicable at the time of publication and may be amended from time to time.
Friction stabilisers are made from high
tensile steel that is roll-formed into a tubular
section containing a continuous longitudinal
opening along the length of the tube. A steel
ring is fixed to the collar end of the tube and
when the stabiliser is installed onto the stabiliser
plate it establishes a compressive force against
the rock. The ring-in combination with a pull
collar also enables load testing once the bolt
has been installed. The tapered end of the
friction stabiliser enables easy insertion into
the drilled hole. Friction stabilisers can also
be manufactured with no taper for installation
direct into paste.
The compression of the tubular shape of the
bolt into a slightly smaller diameter hole generates
a load transfer from the steel to the rock.
The tubular shape of the bolt enables increased
contact of the steel against the rock generating
radial pressure and creating frictional resistance to
the pull-out load of the tube from the hole.
When additional load bearing capacity is
required, friction stabilisers can be grouted.
Once installed load pull-out capacity can be tested
as required by attaching a pull collar to the steel
ring fixed to the collar end of the friction stabiliser
and measuring with a pull testing unit. Friction
stabiliser bolts can be installed with either hand
held or mechanised equipment such as Jumbos.
Fero friction stabilisers are manufactured to exceed
Australia’s high quality standards and are quality
tested in-house and in-situ. Contact the Fero Strata
technical services team for technical and product
advice, operator training and in-situ-testing.
Contact the Fero Strata team for more information
at sales.strata@fero.com.au
1.1 Features
Provide instant ground support
Single pass installation
Made from high tensile steel
Able to be tested in situ
Available in hot dip galvanised or
untreated steel
Available in a range of sizes
1.0 Friction Stabilisers
Friction stabilisers have been used by the metaliferous mining
and tunneling industry for decades and are considered the simplest
and most cost effective form of ground support
Ring end
Taper end
A range of accessories available

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All specifications are applicable at the time of publication and may be amended from time to time.
1.2 Friction Stabiliser Range
Fero Strata friction stabilisers are manufactured in 33, 39 and 47mm diameters and various lengths.
Lengths typically range from 600mm to 3000mm in 300mm increments. Other lengths and customised
product to suit specific requirements are available on request. Fero friction stabilisers are available in
galvanised or untreated steel in packs of 150 or 300 for 33mm stabilisers.
33mm Stabiliser
The 33mm friction stabiliser is primarily used to establish ground support when
hand-held mining operations (Air Leg mining) are required.
39mm Stabiliser
A 39mm stabiliser is primarily used for securing strata mesh by installing into existing
47mm Friction Stabiliser in conjunction with a smaller plate. Longer lengths are also
used as primary ground support when drilling smaller diameter holes.
47mm Stabiliser
The 47mm friction stabiliser is used as a primary support in mechanised jumbo
development and production mining.

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All specifications are applicable at the time of publication and may be amended from time to time.
FS33
Minimum
FS33
Typical
FS39
Minimum
FS39
Typical
FS40
Minimum
FS40
Typical
FS45
Minimum
FS45
Typical
FS47
Minimum
FS47
Typical
Physical Properties
Stabiliser Diameter (mm) - 33 - 39 40 - 45 - 47
Steel Thickness (mm) - 2.3 - 2.3 - 3.2 - 3.2
Mass per metre (kg) - 1.53 - 1.75 - 2.4 - 2.74 - 2.74
Installation Details
Hole Diameter Range (mm) - 29-31 - 35-38 - 41-43 - 43-45
Mechanical Properties
Yield Strength (MPa) 415 510 415 510 350 460 350 450 350 450
Yield Force (Metric Tonne) 8.5 10.4 9.3 11.4 9.7 13.0 12.3 15.8 12.3 15.8
Ultimate Tensile Strength (MPa) 510 600 510 600 430 520 460 520 460 520
Ultimate Tensile Force (Metric Tonne) 10.4 12.2 11.4 13.4 11.9 15.8 16.1 18.2 16.1 18.2
Cross sectional area (mm2
) - 204 - 223 - - 350 - 350
Elongation on 80mm sample (%) 16 - 16 - 20 - 20 - 20 -
Testing Standards
Material
Galvanising
Welding
2.0 Physical & Technical Properties
3.0 Associated Accessories
Fero Strata manufactures and supplies a
comprehensive range of accessories for use with
friction stabilisers. It is recommended that friction
stabilisers be used with associated Fero Strata
products.
For more detailed information contact the
Fero Strata technical services team to ask for
a Fero Accessories brochure.
Email: sales.strata@fero.com.au
AS1594/AS2505/AS1391/AS1365
AS4680
AS1554 Part 1 2004

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All specifications are applicable at the time of publication and may be amended from time to time.
3.1 Stabiliser Plates
Fero manufactures a range of stabiliser and
duplex plates for use with friction stabilisers,
wriggle bolts and cable bolts.
Fero Strata stabiliser plates are designed
in-house and quality tested to a high-load
capacity to provide optimal surface support in
a range of ground conditions. Fero stabiliser
plates are available to suit any bolt type and
diameter in the Fero range. Strata plates most
typically used with friction stabilisers are:
125 or 150 Stabiliser Plate
A general purpose plate, both the 125 and
150 stabiliser plates are manufactured from
4mm material to suit 33mm and 39mm friction
stabilisers; and can be used with a 47mm friction
stabiliser. The dome assists in stabiliser alignment
and provides additional strength. The hanger lug
provides support of service products.
300 Duplex Stabiliser Plate
The duplex plate is a 4mm thick 125 or 150
stabiliser plate welded to a 1.9mm thick 300 x
280mm strata plate, the pressed rib sections in
the 1.9mm material provide additional strength
and minimise deformation upon installation. The
Duplex plate gives greater surface coverage when
supporting strata-mesh or when used directly
on rock surface. User friendly round edges for
increased safety and mesh protection.
200 or 225 Stabiliser Plate
A specialised plate, the 200 and 225 stabiliser
plate is also manufactured from 4mm material.
The 225 stabiliser plate was developed as a cost
saving alternative to the duplex plate. The 225
plate provides slightly less surface coverage than
the duplex plate. However, as it is made entirely
from 4mm material, it provides higher grade
coverage over a larger surface area than the
larger 1.9mm material area of the duplex plate.
The plate is designed to deform during the
installation process to prevent damage to strata-
mesh and to minimise point loading of the ring.
The 200 or 225 plate is typically used with 47 mm
stabiliser but can also be used with 33mm and
39mm friction stabiliser. Dual hanger lugs provide
extra versatility for support of service products.
300 Strata Plate
This lighter gauge 1.9mm plate is used when
greater surface coverage is required in fractured
ground. The plate is manufactured with four
pressed rib sections on the outer perimeters of
the plate to provide more strength to the lighter
gauge material. The 300 strata plate can be used
with any size bolt and in conjunction with smaller
diameter plates

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All specifications are applicable at the time of publication and may be amended from time to time.
3.2 Driver Tools
Fero supplies a full range of purpose designed
driver tools for use with both mechanised and
hand-held bolting equipment. Fero driver tools
and spiral bar are manufactured from high grade
heat treated steel. Threading meets Australian
Standards AS1275. Fero Driver Tools are supplied
loose per unit. Other packing quantities are
available on request.
Driver Tools for Fero friction stabilisers include:
33mm Stabiliser Driver Tool
The 33mm stabiliser driver tool fits directly
into the chuck of the hand-held unit and is
available in male and female configurations
to suit the 22mm hex adaptor.
39mm & 47mm Stabiliser Driver Tools
Our 39 or 47mm stabiliser driver tools are
attached to the rock drill by a spiral bar.
This allows the stabiliser driver tool to
extend outside the front centraliser for
ease of installation of friction stabilisers.
Available in an R38 or T38 thread.
Spiral Bar
The spiral bar is manufactured with a cold
rolled thread over its entire length and supplied
in standard lengths of 3100mm or 3600mm.
The spiral bar is cut to the desired length on
the mine site and used as a joiner between the
rock drill and the 39mm and 47mm stabiliser
driver tool.
3.3 Drill Bit Gauge
3.4 Pull Testing Collars
The pull collar is placed on the friction stabiliser
during the installation process to enable the load
capacity of the bolt to be pull tested and verify the
effectiveness of friction stabiliser upon completion
of installation and periodically over time. Fero
Strata supplies either carbon hollow bar or forged
pull collars to fit 33mm, 39mm and 47mm diameter
friction stabilisers. Available untreated or hot-dip
galvanised in packs of 50.
The diameter of the drill hole is critical for
ensuring the effectiveness of the friction stabiliser.
A bit gauge is used to measure the diameter of
the drill bit which drills the hole for the friction
stabiliser to be inserted into. The drill hole
diameter should be slightly smaller (typically
2-4mm smaller) than the friction stabiliser to be
used. In soft ground it may be necessary to further
reduce the bit size to increase contact between
the steel and the hole thus generating greater
load transfer and increasing pull-out load.
Spiral Bar39 & 47mm Stabiliser Driver Tool33mm Stabiliser Driver Tool Pull Testing Collars

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All specifications are applicable at the time of publication and may be amended from time to time.
3.5 Pull Testing Unit
Pull testing equipment is essential to verify friction stabiliser and other rock bolt system performance.
Fero supplies both hand operated and battery operated pull testing units for in-situ testing of most rock
bolt systems. The unit is easily transportable. Alternatively, the Fero Strata technical service team can
provide full underground pull testing services.
4.0 Product Codes, Weights & Pack Sizes
Fero
Product
Code
Fero
Product
Description
Diameter
(mm)
Length
(mm)
Surface
Finish
Weight
Each
(kg)
Pack
Qty
Pack
Weight
(kg)
Ring
Colour
ID
FS33-0900 Friction Stabiliser 33 x 900 33 900 Un-Treated 1.50 300 450 -
FS33-1500 Friction Stabiliser 33 x 1500 33 1500 Un-Treated 2.40 300 720 -
FS33-1800 Friction Stabiliser 33 x 1800 33 1800 Un-Treated 2.75 300 825 -
FS33-0900G Friction Stabiliser 33 x 900 - HDG 33 900 Hot Dip Galvanised 1.50 300 450 -
FS33-1500G Friction Stabiliser 33 x 1500 - HDG 33 1500 Hot Dip Galvanised 2.50 300 750 -
FS33-1800G Friction Stabiliser 33 x 1800 - HDG 33 1800 Hot Dip Galvanised 3.00 300 900 -
FS39-0600 Friction Stabiliser 39 x 600 39 600 Un-Treated 1.20 150 180 -
FS39-0900 Friction Stabiliser 39 x 900 39 900 Un-Treated 1.70 150 255 -
FS39-2400 Friction Stabiliser 39 x 2400 39 2400 Un-Treated 4.25 150 638 -
FS39-0600G Friction Stabiliser 39 x 600 - HDG 39 600 Hot Dip Galvanised 1.20 150 180 -
FS39-0900G Friction Stabiliser 39 x 900 - HDG 39 900 Hot Dip Galvanised 1.70 150 255 -
FS39-2400G Friction Stabiliser 39 x 2400 - HDG 39 2400 Hot Dip Galvanised 4.50 150 675 -
FS40-900G Friction Stabiliser 40 x 900 - HDG 40 900 Hot Dip Galvanised 2.25 150 338 -
FS40-2400G Friction Stabiliser 40 x 2400 - HDG 40 2400 Hot Dip Galvanised 6 150 900 -
FS45-2400G Friction Stabiliser 45 x 2400 - HDG 45 2400 Hot Dip Galvanised 6.95 150 1043 Blue
FS47-0900 Friction Stabiliser 47 x 900 47 900 Un-Treated 2.50 150 375 -
FS47-1800 Friction Stabiliser 47 x 1800 47 1800 Un-Treated 5.10 150 765 -
FS47-2100 Friction Stabiliser 47 x 2100 47 2100 Un-Treated 6.10 150 915 -
FS47-2400 Friction Stabiliser 47 x 2400 47 2400 Un-Treated 6.70 150 1005 -
FS47-3000 Friction Stabiliser 47 x 3000 47 3000 Un-Treated 8.60 150 1290 -
FS47-0900G Friction Stabiliser 47 x 900 - HDG 47 900 Hot Dip Galvanised 2.75 150 413 -
FS47-1800G Friction Stabiliser 47 x 1800 - HDG 47 1800 Hot Dip Galvanised 5.20 150 780 Red
FS47-2100G Friction Stabiliser 47 x 2100 - HDG 47 2100 Hot Dip Galvanised 6.20 150 930 Green
FS47-2400G Friction Stabiliser 47 x 2400 - HDG 47 2400 Hot Dip Galvanised 6.95 150 1043 -
FS47-3000G Friction Stabiliser 47 x 3000 - HDG 47 3000 Hot Dip Galvanised 8.80 150 1320 Yellow

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