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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.
Feed Opening Size Feasibility
Posted by Sid from New Delhi, AL, IN on June 19, 2009
There’s a 36″ X 38″ jaw crusher up for sale at quite a reasonable price. I find the feed opening size quite odd as I had heard about 36″ X 36″ and 36″ X 42″ size, but never about 36″ X 38″. I have doubts about the feasibility of the crusher. Can you tell me the relation between the feed opening size and feasibility? To what limit is it feasible to keep the shorter dimension of feed opening constant (36″ in this case) and keep on increasing the larger dimension (38″ in this case)?
Thanks in advance
Sid
Typically the designation or size of jaw is called out by it top opening. The first dimension is usually the distance between the stationary and movable jaws and the second dimension is the roughly the distance between the cheek plates -- thus the “usable opening”.
I agree with you when you say that the jaw size”36 x 38” is a bit odd. I checked back into the records at my disposal and found that most of the companies that manufacture jaws have a 36 x 42 or a 36x 48. This seems to be the norm for a 36” opening between the stationary & movable jaws. That’s not to say there has not been one made with the dimensions you have called out.
I’m not sure just what you mean by feasibility. Any given crusher manufacturer can, and at times has made jaw sizes out of this normal range of widths. What initially comes to mind are the jaws which have been produced to accommodate the recycling industry. In some cases there have been width increases to allow longer “slabs” of material to readily enter the chamber without bridging & plugging up the crusher.
If I were to have the manufacturer of the jaws you are reviewing, I would be happy to look into it further. If you choose, you can contact me directly at steve_dz@columbiasteel.com.
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.