The document describes Atlas Copco's new Heavy Duty COP 1800HD series rock drills. The HD series features a stronger design than the standard COP 1800 with improvements like a thicker, four-bolt front head that is more resistant to demanding operating conditions like free-hammering. Field trials in Australia and Canada found the HD series required only normal wear part replacements and had no side bolt failures, demonstrating longer time between overhauls. The document recommends the Heavy Duty series for its potential to lower operating costs in most applications.

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Heavy Duty COP 1800HD Series
Peter Bray
Product Manager – Face Drilling Equipment

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Heavy Duty COP 1800HD Series
Background
 Do you have trouble with poor
operator practices?
 Is there a lot of free-hammering
occurring with your Boomer?
 What if you could reduce your
operating costs of your drifters?
 What if you could make your rock
drill tougher?
THE ANSWER IS TO GO
HEAVY DUTY!

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Heavy Duty COP 1800HD Series
 The HD range of drifters from Atlas Copco
feature a much stronger design.
– Based on the COP 1800 design
– No changes required to feed/hoses
– 4-bolt front head
– No all-the-way-through side bolts
– More “meat” in the front head
– Strengthened design of internal parts
– Tougher impact piston
 Available in the following models:
– COP 1638HD (16kW output)
– COP 1838HD (18kW output)
– COP 2238HD (22kW output)
Introducing the Heavy Duty HD series drifter
COP 1838HD - New
components in darker grey

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Heavy Duty COP 1800HD Series
Features and benefits
 Increased resistance to demanding
operating conditions
– Longer time between overhauls
– Increased productivity due to less down time
– Able to better withstand “free-hammering”.
 Change in side bolt design (4 front bolts, 2
rear bolts)
– Impact piston miss-alignment due to side-bolt
failures virtually eliminated
– Significantly reduced chance of secondary
damage to internal parts
– Easier side bolt torque procedures

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Heavy Duty COP 1800HD Series
Features and benefits
 38mm shank design means the rock drill is
optimized for drifting
– Smaller flushing head means more material in the
front head
– More material in the front head means forces are
better absorbed
– Extra material allows better internal design for stop
ring
 HD conversion kits available for existing COP
1800 series rock drills
– Upgrade of existing rock drills
– Gain benefits of the HD design without having to
buy complete new rock drill
– Can be ordered as a single part number kit

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 New parts for COP
1800HD series
– 2 x new castings
 Front head
 Gear housing
– Several new parts
 Front head
 Flushing head
 Front guide
 Cover
 Gear housing
 Rear side bolts
 etc
What is different?
Heavy Duty COP 1800HD Series

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 4 x front stub bolts
holding front head to gear
housing
– Bending stresses from
drill string better absorbed
 4 bolts instead of 2
– Separate front bolts from
rear side bolts
 Failure of front bolts do not
affect rear bolts
 Less complicated bolt
tensioning procedure
Heavy Duty COP 1800HD Series
What is different?

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 New cover for shorter rear
side bolts to be installed
– Impact piston section
separated from the front
 Unlikely that rear bolts will
fail
 Expensive piston cylinder
section protected
– New rear side bolt locking
head
 Better force distribution
 Longer life
Stress on
thin section!
What is different?
Heavy Duty COP 1800HD Series

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 New front head
– More “meat” in the front
head
 Stronger and better able to
withstand forces
– 4 bolt design
 Easier to remove when
changing flushing seals
 Rear of rock drill unaffected
What is different?
Heavy Duty COP 1800HD Series

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Heavy Duty COP 1800HD Series
 COP 1800 – Cross Section
– Stop ring touches flushing
head
 Excessive free hammering
can cause flushing head
damage
 Forces then applied to thin
front head material section
– Single 4mm diameter “tell-
tail” hole
 When flushing seal fails
operator can continue drilling
 Difficult to see in some drilling
positions
 Significant flushing pressure
retained, hence chance that
rear seal fails and water
enters impact area of rock
drill
The standard COP 1800 front head design

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Note! max ø38 (T38/R38) drillsteel
 COP 1800HD – Cross
Section
– Thicker material in front
head
 Stronger and better able to
absorb forces
– Stop ring does not touch
flushing head
 No forces acting on flushing
head
 Forces applied to thicker front
head material section
– Twin 10mm diameter “tell-
tail” hole front & rear
 Flushing pressure lost, hence
operator finds it difficult to
continue to drill. Must change
seals!
 Minimal chance that water
can enter impact area of rock
drill
Heavy Duty COP 1800HD Series
The heavy duty COP 1800HD front head design

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 COP 1838ME in red
– Virtually same profile
– No impact on lookout
angles
Heavy Duty COP 1800HD Series
Size comparison

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Heavy Duty COP 1800HD Series
Field trial experience
 Australia (6 x locations)
– Tested with customers that perform face
drilling, bolting and scaling (lots of “free
hammering”) with Boomers
– Owner operators and contractors
– Several sites with high saline flushing water
– High utilization of equipment
 Results
– High customer acceptance (placing orders for
conversion kits)
– During 3 month trial only parts consumed were
“soft parts” such as seals and front guide
(normal wear item)
– No side bolt failures
– Australia will standardize on HD version

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Heavy Duty COP 1800HD Series
Field trial experience
 Canada (1 x location)
– Owner operator
– Face drilling and bolt hole drilling
application
 Results
– Since start of trial only consumed “soft
parts” such as seals
– Customer acceptance has been very
positive
– Canada will standardize on the HD version
for future face drilling equipment

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Heavy Duty COP 1800HD Series
Summary
 Heavy Duty “HD” variant has proven
to last longer between overhauls in
demanding operating conditions
 Strong potential for lower operating
costs in most applications compared
to the standard COP 1800 design
 Highly recommended for both mining
and civil tunnel projects
 Existing COP 1800 series can be
upgraded via conversion kits

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Committed to
sustainable productivity.

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