KAMY offers unmatched quality, value, and innovation in our rock and concrete cutting products. Our expertise in engineering and our quality, US manufactured tunneling, mining and construction equipment is unparalleled to others in the industry.
KAMY is the leading manufacturer of roadheaders in the weight class of 13-100 tons weight. Our roadheaders offer interchangeable cutter heads, both transverse and axial and are custom engraved for each project. Our hydraulic cutters are suitable for material with uniaxial compressive strength ranging from 500 to 25,000 pounds per square inch. All of our products can be utilized in a variety of applications from rock excavation, trenching, demolition and concrete, to underwater cutting, tunneling, and scaling.
Technology led the establishment of the quality assurance after-sales service, improve the management system.
Production license of the product ensure that the license number, approval date and expiration date.
Product packaging in line with national regulations, due to packaging damage caused by the products borne.
Any difficulties encountered by customers, we will do our best in the first time to provide perfect service.
World's biggest tunnel machine Bertha emerges from - Autoblog
Bertha, the world's largest tunnel-boring machine, ends its journey today. It has spent four years traveling less than two miles to build a new car tunnel underneath Seattle.Learn More
Prediction of roadheader performance by artificial neural
Performance prediction is one of the major parameters for the success of roadheader applications and generally deals with machine selection, production rate, and bit consumption. Instantaneous cutting rate (ICR) is defined as the production rate during aLearn More
Bertha Finally Breaks Through In Seattle : The Two-Way : NPR
Bertha Finally Breaks Through In Seattle : The Two-Way After a two-year delay for repairs, the giant tunnel-boring machine has completed its mission far beneath the city's streets.Learn More
A new model to predict roadheader performance using rock
Prediction of roadheader performance plays a significant role in the plan of tunnel construction, which is influenced by different key parameters, including rock strength, discontinuity in rock mass, type and specifications of roadheader machine, and britLearn More
Big Bertha, world's largest tunnel-boring machine, arrives
With a 57-foot diameter and a length of a football field, Big Bertha is the world’s largest tunnel-boring machine. She’s quite hefty too. Bertha is assembled from 41 parts, the largest of ...Learn More
Inside the Massive Tunnel Seattle Built to Replace an
Seattle's waterfront is getting a makeover. It hasn't been a particularly rapid affair (certainly nothing for Elon Musk to measure himself against), but the workers building a tunnel to replace a section of elevated roadway, and reopen up the city to theLearn More
Bertha | The Seattle Times
Read more about the technical challenges and rising costs of the Highway 99 tunnel project, and the successes and travails of Bertha, the biggest-ever boring machine.Learn More
Follow Bertha's breakthrough - The WSDOT Blog
The tunneling machine Bertha will mine ... Below is footage of Bertha's breakthrough, ... http://www.king5.com/news/local/seattle-tunnel-boring-machine-bertha ...Learn More
Watch Bertha, the world’s largest tunnel boring machine
From the dark depths beneath Seattle, Bertha the SR 99 tunnel machine headed out of the muck and into daylight on ... the world’s largest tunnel boring machine, ...Learn More
Hemisphere | Definition of Hemisphere by Merriam-Webster
Hemisphere includes the prefix hemi-, meaning "half". The northern and southern hemispheres are divided by the equator, the circle halfway between Earth's two poles. The eastern and western hemispheres aren't divided so exactly, since there are no poles iLearn More
Big Bertha: Mystery object blocks Seattle's tunnel drill
The world's biggest tunnel boring machine, named after Seattle's first female mayor, has been brought to a halt ... Big Bertha: Mystery object blocks Seattle's tunnel drill. ... The $80 million ...Learn More
Big Bertha – world’s largest tunnel boring machine
Named after one of Seattle’s early mayors, the $80 million drill Big Bertha is 326 feet long, weighs 6,700 tons, and does much more than drill. John Blackstone reports on what the high-tech ...Learn More
Seattle’s Tunnel Boring Machine Bertha - Video Results
More Seattle’s Tunnel Boring Machine Bertha videosLearn More
The Brilliant Vigilance of Seattle's Huge New SR-99 Tunnel
How do you keep a tunnel safe? Hundreds of cameras, 17 jet fans, and a sprinkler system that can out-hose Splash Mountain.Learn More
ROADHEADER PERFORMANCE PREDICTION - bamfordrocks.com.au
Correlations of observed roadheader performance with each author’s combination of laboratory measurements, with or without rock mass characteristics, have led to some success in “ball-park” predictions of future field performance.Learn More
Save time, stay dry on foot in Seattle’s ‘hidden
Eric Makus uses this tunnel to walk underground from the King County Administration Building on Fourth and James to the Goat Hill Parking structure on Sixth and Jefferson.Learn More
Bring Back the Thor Automagic, the 1940s Hybrid
The Large Hadron Collider, a particle accelerator located at CERN outside of Geneva, Switzerland, is the largest machine in the world: It has a circumference of almost 17 miles and took around a decade to build.Learn More
Big Bertha, world's largest tunnel-boring machine, arrives in
The owner of the tunnel-boring machine is Seattle Tunnel Partners, the contractor chose by WSDOT for the tunnel project. Bertha even has her own Twitter account and it’s quite entertaining. Nice ...Learn More
The World's Largest Tunnel-Boring Machine Must Be Saved
The World's Largest Tunnel-Boring Machine Must Be Saved. Bertha has stalled deep beneath Seattle, leaving the city's planned waterfront renaissance hanging in the balance.Learn More
Alaskan Way Viaduct - Tunneling
The tunneling machine known as Bertha began tunneling ... the machine's cutterhead being lowered into the launch pit near Seattle's stadiums). The machine ...Learn More