Korea Vibro ripper

Significantly wider offering & 4 market segments enable further success

Sterling Ripper

Sterling Ripper literally means excellent and outstanding rock breaking equipment!

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Job Applications

Significantly wider offering & 4 market segments enable further success
Mining

Mining

Downtown construction

Downtown construction

Tunnel Construction

Tunnel Construction

Underwater operation

Underwater operation

Tip(Tooth) type

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Chisel type

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Model Unit SR25 SR30 SR40 SR50 SR80
Suitable Excavator ton 20~25 28~34 36~43 46~60 70~90
Frequency bpm 2,500~3,500 2,500~3,200 2,000~2,800 2,000~2,800 2,200~2,500
Weight(Incl. Mounting cap) kg 2,300 3,450 4,150 5,100 10,500
Operating Pressure bar 180~220 180~220 210~250 210~250 240~270
Oil Flow lpm 170~200 180~220 240~280 250~310 500~560
Dimension (A x B x C) mm 787x1,148x2,870 863x1,321x3,231 915x1,401x3,385 1,060x1,554x3,665 1,300x2,100x4,200
Tool Diameter mm 110 120 130 140 180

Sterling Ripper offers three options in Tip type for soft & medium hard-rock, Chisel type for hard-rock and Compactor type for compacting ground.
Single Sterling Ripper body has three optional tools! You can simply change it at site any time depending on rock types and various application!



Cartilage-link structure and double bearing structure of Sterling Ripper
  • Maximizing productivity and minimizing down time by on-site parts replacement
  • Minimizing vibration transmitted to excavator and operator even at hard-rock
  • Keeping constant and high productivity at hard-rock job site
  • Rigid and higher durability at hard-rock job site

Comparison chart

Available equipment for rock hardness

Big class Sterling Rippers can work well at hard-rock without problems most vibratory rippers have, thanks to its cutting-edge technology, Non-link structure

The bigger class of Sterling Ripper, the much higher productivity than hydraulic breaker up to soft medium hard-rock, and perform well at hard-rock job site compared to hyd. breaker.

Strong points of Sterling Ripper

Higher productivity than hydraulic breaker 2-8 times better productivity than hyd. breaker depending on type of rocks
More powerful than other vibratory rippers Unique structure and design specially bigger and double eccentric weight
enable Sterling Ripper most powerful Ripper in the same class.
Selective tool options – Two tools for one Ripper Chisel type for hard rock and Tip(Tooth) type for Soft & mid hard rock
Two optional tools enables Sterling Ripper to offer wider selections of application than
competitors at rock breaking job sites.
Minimum vibration to excavator and operator at hard-rock Non-link structure of Sterling Ripper allows more powerful striking
force but less vibration transmitted to excavator and operator.
Less impact to excavator and less fatigue to operator
Minimum noise Sterling Ripper’s unique Non-link structure technology allows minimum noise at max.
90db and downtown building construction can be done without restrictions.
Unique design of double bearing structure allows at least 2 times longer life time of bearings
Easy on-site maintenance & low maintenance cost Concise structure of components
and double bearing structure most parts can be replaced at job site.
No need to return it to repair shop. Less number of parts than competitors
enable low maintenance cost. Bolt type of diamond-shape tip(tooth) enables fast
and easy replacement of the tip.Maximum productivity can be achieved by reducing down time
by on-site parts replacement and fast tip(tooth) replacement
Under water operation without special devices All kinds of work under water can be done without any expensive and complicated preparations.

Hyd. Breaker vs Vibratory Ripper

Vibratory Ripper’s advantages compared to Hyd. Breaker

1. Higher productivity than hydraulic breaker

  • Up to 5 times higher productivity than hyd. breaker at less hardness rock formation
  • The bigger class of Ripper, the higher productivity
  • The less hard rock formation, the higher productivity
  • Constant high bpm by vibratory power

2. Less noise than hydraulic breaker

  • 10~30% less noise than hyd. Breaker
  • Less noise(under 90dB) than silent hyd. Breaker
  • The less hard rock formation, the less noise
  • Minimizing noise at job site allows demolition work in downtown or noise restricted area

3. Under water operation without special devices

  • All kinds of work under water can be done without any expensive and complicated preparations.
  • No need to invest on renting or purchasing air compressors ex) USD150~450 per day
  • No need to spend fuel cost for air compressors ex) 50liter diesel per hour x 8 hours = USD400~500 per day
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Vibratory Ripper’s draw back compared to Hyd. Breaker

1. Lower productivity than hydraulic breaker at hard-rock job sites
2. Frequent breakdown in operation at hard-rock job sites due to repulsion energy and constant fatigue to links and bearings of Ripper
3. Impact or damage to excavator and increasing operator’s fatigue due to vibration and repulsion transmitted to the excavator and the operator

Solution of Sterling Ripper for Vibratory Ripper’s draw back

1. Solution for lower productivity than hydraulic breaker at hard-rock job sites

 Solution How to do & Effect
Maximize vibration power
  • Change the size of eccentric weights to maximize centrifugal force
  • Change the shape of eccentric weights to maximize centrifugal force
  • Optimize correlation between hyd. motor and eccentric weights
  • Maximize durability of components which can withstand extra impact due to power increase
Selective tool options – Two tools for one Ripper
  • Chisel type for hard rock and Tip(Tooth) type for Soft & mid hard rock
  • Two optional tools enables Sterling Ripper to offer wider selections of   application than competitors at rock breaking job sites.
By maximizing vibration power

Conventional Ripper eccentric weights

Sterling Ripper eccentric weights

Conventional Ripper eccentric weights Sterling Ripper eccentric weights
R distance
(from center of gravity to edge)
R  < A/2 R > A/2
Shape of eccentric weights Semicircle Long board shape and double eccentric weights
C distance
(from gyrocenter to center of gravity)
C distance is short. C distance is long.
Effect Low centrifugal force = Low vibration power High centrifugal force = High vibration power


Solution of Sterling Ripper for Vibratory Ripper’s draw back

1. Solution for lower productivity than hydraulic breaker at hard-rock job sites - By Chisel type Sterling Ripper

 Solution How to do & Effect
Selective tool options – Three tools for one Ripper
  • Chisel type for hard rock and Tip(Tooth) type for Soft & mid hard rock
  • Compactor type for compacting ground
  • Two optional tools enables Sterling Ripper to offer wider selections of application than competitors at rock breaking job sites.
Sterling Ripper offers three options in Tip type for soft & medium hard-rock, Chisel type for hard-rock, and Compactor type for compacting ground. You can simply change it at site any time depending on rock types and various application!

2.Solution for frequent breakdown in operation at hard-rock job sites due to repulsion energy and constant fatigue to links and bearings of Ripper

3.Solution for impact or damage to excavator and increasing operator’s fatigue due to vibration and repulsion transmitted to the excavator and the operator

 Solution How to do & Effect
Cartilage-link structure Use damper cushions with a link instead of bearings with the links to get less repulsion, less noise and no chance of link bearing broken & easy on-site maintenance
Double bearing structure Unique design of double bearing structure allows at least 2 times longer life time of bearings
Centered double eccentric weights Unique design of centered double eccentric weights allow better durability of bearings
 Solution How to do & Effect
Cartilage-link structure Use damper cushions with a link instead of bearings with the link to get less repulsion, less noise and no chance of link bearing broken & easy on-site maintenance

Main drawback of the Link structure

The links and bearings break easily working at hard-rock job sites and Ripper should be sent to maintenance shop to fix it. It takes a lot time and cost which affect total operating cost eventually.

Conventional Ripper

Main advantage of the cartilage link type

Sterling Ripper has adopted damper cushions with a link type instead of link bearing type. It is a very simple process of replacing cushions by simple unscrewing and screwing covers on-site, which allows can save a huge down time and maintenance cost.

Sterling Ripper

Main drawback of the Link structure

F₁* A = B * C Thus, the farer distance A is, the more load on C.
Tugging rocks and soil causes huge load to upper links and bearings due to principle of levers. The load increase at hard-rock job sites and it damages to the links and bearings. When links and bearings are broken, they should be sent to maintenance shop and it takes long time to fix it with a lot of cost. And vibration is easily transmitted to excavator and operator through the links.

Main advantage of the cartilage link type

In the cartilage-link type of Sterling Ripper, one link and dampers disperse load and reduce vibration transmitted to excavator and operator. So cartilage-link type protect from impact and damage to excavator and minimize operator’s fatigue. And the damper cushions can be replaced on-site and it takes short time to maintenance with few cost. Most importantly it is not necessary sent to maintenance shop and maximize productivity by cutting down time so much.


Conventional Ripper’s bearings



Sterling Ripper’s bearings

Number of bearing Single bearing per each side of axis Double bearing per each side of axis
Advantages - High vibratory power at the same size of bearings
- At least two  times longer life time of bearings
- Higher durability at hard-rock job sites
 Solution How to do & Effect
Centered double eccentric weights Unique design of centered double eccentric weights allow better durability of bearings


Conventional Ripper’s bearigs



Sterling Ripper’s bearings

  Conventional Ripper’s bearings Sterling Ripper’s bearings
Distance from axis A A=B+C, B > C A=B+C, B = C
Center of gravity B and C ≠ A/2 B and C = A/2
Weight distribution “Bearing B” has more weight than “bearing A”. Weight of “A bearing” and “B bearing” is the same.
Effect Life time of both “A bearing” and “B bearing” is shorten due to imbalance of their weight. Longer life time of both “A bearing” and “B bearing”

Summary of Sterling Ripper’s selling point

Feature How to do & Effect
1. Unique shape and size of Sterling Ripper’s eccentric weights Maximize vibration power by optimizing centrifugal force
2. Selective tool options – Two tools for one Ripper
  • Chisel type for hard rock and Tip(Tooth) type for Soft & mid hard rock
  • Two optional tools enables Sterling Ripper to offer wider selections of application than competitors at rock breaking job sites.
3. Cartilage-link structure and double bearing structure of Sterling Ripper
  • Easy maintenance – On site parts replacement
  • Concise structure of components with links and bearings
  • Maximize vibration power by optimizing centrifugal force
  • Minimizing vibration transmitted to excavator and operator even at hard-rock
  • Minimizing noise (15% ~20% lower noise than traditional vibratory ripper.)
4. Double bearing structure Unique design of double bearing structure allows at least 2 times longer life time of bearings
5. Centered double eccentric weights Unique design of centered double eccentric weights allow better durability of bearings
6. Bolt type of diamond-shape tip(tooth)
  • Bolt type of diamond-shape tip(tooth) enables fast and easy replacement of the tip.
  • Maximum productivity can be achieved by reducing down time by on-site parts replacement and fast tip(tooth) replacement