Chris
As Corus notes, BS7608 "Fatigue Design and Assessment of Steel Structures" is very helpful. It is often used in design of large rotating equipment such as grinding mills and should provide reliable data.
Another standard that may help is BS7910 "Guide on Methods for Assessing the...
My experience with worm boxes has been that under a reverse load condition they will almost certainly creep backwards. They cannot perform the function of a holdback or holding brake safely. Vibration as noted by Denny D makes all the difference. Reverse efficiency calculations do not provide...
You can check alignment as per the good advice you've been given.
This may sound somewhat basic but have you checked:
# The shaft design for deflection and angle of deflection at the gear. Poor shaft design can result in gross misalignment under load.
# That the bearing type and arrangement is...
The lubrication system in a splash lubricated gear reducer can be such as to favour one particular direction of rotation. When the lubrication system relies on one or two gears throwing enough oil up to fill internal oil chanels and splash onto other gear mesh, the direction of rotation, fill...
This may be long shot but a number of years ago, it was possible to purchase second hand gun barrel material. I worked for a company that made extrusion die containers using this material at relatively low cost and with great success. Alternatively have you looked at forging the shape you want...
Re Pinion pitting
One of the main reasons for mill gear and pinion problems has been incorrect lubricant and/or incorrect application of lubricant. Misalignment of pinion with the gear can make the problem much worse. It is essential to get both lubrication and alignment right to avoid problems...
For safe working in a confined space such as a vessel, it may be necessary to have such a valve installation. The Statutory Authority responsible for Occupational Health and Safety in your area is a good start. Australian Standard AS2865 titled "Safe working in a confined space" makes...
http://www.jacmor.com.au/ I suggest you refer your query to a reputable designer manufacturer. This manufacturer JACMOR ENGINEERING is known as such in Australia at least. PS I have no connection with JACMOR but have used their equipment.
It all sounds like a very temporary fix. Welded shafts, particularly when the weld or heat affected zone sees any cyclic stress, can be a receipe for disaster. British Standard BS7608 titled "Fatigue design and assessment of steel structures" and possibly BS7910 titled "Guide on...
Talk to SKF, Timken, FAG or relevant bearing supplier. Shrink fits used with bearings will affect the bearing clearances. They are normally specified by bearing manufacturers and the manufacturers should be able to provide sensible info re removal.If you use an open flame to heat the bearing be...
Measure the drive power and calculate the operating drive belt tension. kW(power) = kN (Belt tension force)* m/s ( belt velocity).
Clamp the loaded belt at the tail end and using a hydralic cylinder and clamp at the head drive end, tension the belt to the maximum operating tension. Measure the...
Before you start spending money I suggest you make sure you have the detail history on the complete installation: Has the noise been there since the original installation??; If not what has changed ??; Is the present installation still installed/adjusted correctly??. Has the drive been...
