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Q/A Archives
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ATTENTION: New Expert!!
Steve Dolezal
Product Engineering Manager
Columbia Steel Casting Co., Inc.
(800) 547-9471
Steve Dolezal has been a crusher wear parts engineer at Columbia Steel for 21 years. His knowledge includes a wide variety of jaw, cone and roll crusher makes and models, as well as their specific industry applications and equipment conditions. He works closely with customers to recommend and develop wear parts to better meet their needs, often resulting in increased service life, throughput, or both. Doug Henderson will answer questions about gyratory crusher wear parts with his expertise as a product engineer at Columbia Steel for over 10 years.
Featured Question
Increased Feed Opening
Posted by John from Peoria, IL, US on April 6, 2007
What is the value of an increased feed opening design in a set of cone crusher liners?
The value in making cone liners with an increased feed opening is not about allowing for greater reduction ratios, but about insuring that the liner set provides a consistent output rate through full expenditure.
The concept is to remove steel where it’s not needed (at the feed end) and apply the wear steel where it is needed (at the discharge end). Most cone liners are removed when the feed opening closes off enough to reduce the output rate. A proper feed opening dimension that is in ratio with the thickness of the bowl and mantle, with proper feed size, will wear to full expenditure while maintaining a constant output rate.
Increasing the feed opening and thickness of cone parts takes considerable care in order to minimally affect the included angle between the liners, and not cause an adverse reaction to the size of feed material. Each category of crushing cavity -- fine, medium and coarse -- requires its own ratio of feed opening to length and thickness. In some cases, these categories of crushing are split even more finitely. This subject is closely related to determining the optimum feed size for a particular set of liners.
Columbac II - Epoxy Resin and Hardner Mix Ratio
Posted by Eugene from Newark, CA, US on May 28, 2009
What is the mix ratio of the epoxy resin and the hardner for the Columbac II?
Each “kit” of backing Columbia supplies comes with premeasured quantities of epoxy and catalyst. However, the ratio for both of our types backings are as follows:
Type of Backing................By Volume...............By Weight
Regular……………………100 / 10.9…………..100 / 6
Hi-Impac…………………..100 / 12.6………… 100 / 7.3
As always, the directions should be currently affixed to each container and they should be followed explicitly.
high abrasive material
Posted by Dhruv from Nangal, OT, IN on April 29, 2009
Dear Sir, I am crushing river bed material which has silica around 70%. Please advise me which mateial jaw plate I should use that will give me longer life.
There is more than one thing that determines the alloy recommended in jaw crushers. Given all other things equal, if the silica content is 70% and the compressive strength of the stone is above 40,000 psi than we would recommend a premium grade of manganese. If the compressive strength is below this number, chances are that the manganese will not work harden to its full extent. This basically means that you could by the premium grade of manganese and not achieve its full benefits.
Used Manganese Liners
Posted by Lynne from Mission, BC, CA on April 20, 2009
We have about 10 sets of manganese cone liners and some jaw plates –do you recycle these? Would there be any discount on the new jaw plates or liners if we traded the worn out ones for new ones?
Columbia Steel does purchase used manganese crusher liners and can also apply credit from used liners against new orders. It would be best if you contact Columbia Steel's purchasing manager Marty Slagle at marty_s@columbiasteel.com for more information.
Roll Bearings
Posted by Gary from Durango, CO, US on April 13, 2009
We have 1953 Pioneer roll crusher. I work for Niel’s Exc. Do you know were we can get parts? Bearing went out on one of the rolls. Can you help?
Columbia Steel is a wear parts supplier. For rolls crushers we typically supply the roll shells & the side or key plates. One would need to attain the bearings from the manufacturer of the machine or from a reputable bearing supplier. If a bearing supplier is engaged, they will typically need to know the physical dimensions of the existing bearing as well as its type.