Three Things Every Entertainment Rigger Should Know About Electric Chain Motors
Entertainment | Safety and Training | Hoisting & Lifting Equipment | by Columbus McKinnon Training Team | Jan 01, 0001
During our CM-ET training classes we receive many questions, especially about chain and proper lubrication. Chain is among the most abused and neglected part of the motor. It is almost rare to find chain in the field that does not need to be lubricated unless it has just come from the factory.
Chain maintenance comes up fairly often in CM-Entertainment's training courses.
Here are the three most frequently asked questions along with our answers:
The easiest way to know if your load chain needs lubrication is by watching it as it goes into the chain bag. If it is stacking up on one side as it enters the bag, it is a sure indication that you are lacking proper lubrication.
In past years when riggers were using the old Klein-type bags with the single hook connecting to the side of the hoist, the question would come up: How do I avoid the chain coming out of the bag? When the chain is dry and it stacks up, it eventually comes out over the top of the bag.
If the chain is properly lubricated, it will flow evenly and disperse into the bag like water.
Another sure sign of a lack of lubrication is when you have a full load and you hear that “tell all” creaking sound as the chain is running over the lift wheel. What you hear is the chain actually wearing itself out by friction welding the links together and breaking that weld because there is no lube between the them. This is where you get chain wear.
The oil recommended by Columbus McKinnon is 10R made by Lubriplate. There are many other brands that are available that you can get at your local hardware store. What is important is that the lube you obtain have an “EP” additive. The “EP” is short for extreme pressure. Without that additive you will not be able to keep your lubrication between the links while under a full load. Most chain saw manufacturers produce oil for their saws that contain this additive. Most bar and chain lubrications will work.
There are many ways to lube your chain but I recommend to drop your chain into a bucket and pour the lube over the pile of chain. It is important that the chain be loose and the links separated at this point. If you spray it on while the chain is hanging you might not be able to get between all the links. After adding the lube, hang it up and let the chain drip dry as long as possible and retain as much of the run off so that you can reuse it. At this point I recommend taking some dry rags and wiping the chain down to remove as much of the excessive oil as possible. You will not be able to remove it between the links with this process, and between the links is where you want the lubrication. It is ok if the chain appears to be dry as long as the lube is between the links where it is needed.
Again, lubrication is very important and can not be neglected. Keep an eye out for dry chain.
Columbus McKinnon is a worldwide leader in training for lifting and motion control professionals. Designed by experts with decades of industry experience, our curriculum offers in-depth education for professionals working with hoists, overhead cranes, and rigging.
Training is an investment that pays. Fewer accidents, higher morale and greater productivity are but a few of the dividends. Whether you need to meet OSHA or ASME requirements, receive overhead crane and rigging certification, or simply gain the peace of mind that comes from having a safer work environment, Columbus McKinnon can help.
Articles authored by "Columbus McKinnon Training" were written by industry professionals with decades of unique and in-depth experience in the material handling industry who are no longer employed by Columbus McKinnon.
Electric Chain Hoists
By: CM Entertainment Technology