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CHOCKS – ALDON
CHOCKS
CAST STEEL WHEEL CHOCKS - INFO (MADE IN USA)
Why Use Wheel Chocks?
LOCOMOTIVES & RAIL CAR STOPPING DEVICES
A gust of wind is enough to cause a 118,000kg
freight car to start rolling. Thanks to roller bearings,
freight car wheels offer very little resistance to
movement. In fact, the contact area of each wheel
on the rail is smaller than the size of a dime. This is
why moving heavy loads by rail is so efficient! But
at the same time, all this mass, so easily moved,
needs to be securely blocked while the car is being
worked.
Loading freight cars increases the strain on the
car brakes. Liquid pouring into a tank car or a
forklift moving back and forth in a boxcar create
dynamic forces which can overcome the holding
power of the brakes. slack in mechanical car brakes
can be enough to allow a wheel to move forward
approximately 50mm and dislodge a dock board or
strain a hose line. This why OsHA mandates the use
of wheel chocks in addition to car brakes wherever
rail cars are being worked. Photo by courtesy Baden Tidd
Aldon Chocks have the Edge
In 1955 Aldon Company introduced cast steel chocks with the unique feature of
replaceable spurs (or teeth). The spur is the key to effective chocking. Under wheel
pressure the spur bites into the hard, smooth surface of the rail to keep the chock
from sliding. But eventually, like the blade of a knife, the spur edge will become dull
from use. A dull spur can’t bite into the rail to keep the chock from sliding. You can
keep the sure grip of an Aldon wheel chock by turning the spur to three new sharp
edges and then replacing the spurs at nominal cost instead of buying a new wheel
chock.
It’s easy to turn and replace worn spurs in Aldon Chocks
Chock spurs have four edges. When the first edge becomes
www.specialisedforce.com.au
dulled from use, you can tap the spur out of its slot and
re-insert it with a fresh edge exposed. By turning the spurs SCAN
at intervals you extend the service life and effectiveness & PLAY
of your wheel chock. Ask for our free booklet on changing
out spurs or go to www.aldoninfo.com and watch our two-
minute video on chock spur maintenance.
MODEL NO. 6008
Replacement Spurs
Made of 12.7mm sq. tool steel, heat treated for a hard and sharp edge.
130 SYDNEY Head Office (02) 9547 1844 Adelaide (08) 8352 8866 Brisbane (07) 3256 6011 Townsville (07) 4728 8756
Darwin (08) 8984 4453 Melbourne (03) 9761 4199 Perth (08) 9354 8544 Port Hedland (08) 9172 1113 Tasmania 0427 423 217