A huge amount of technological bearing info and method is offered by most bearing producers. If you are like me, you basically do not have the time, tolerance, or desire, in wading by means of all of this details, with cost effectiveness becoming unsupported by the frequent require to outsource bearing maintenance, but yet do have an desire in running value reduction for your tree stump grinder. Alternative bearings cost above £100 every, and represent a huge part of overall device maintenance expenses. This guide is meant for individuals who wish to decrease value by escalating bearing support life. Bearing failure or untimely bearing put on on stump grinders is mainly due to inadequate maintenance of clean lubricant. I use a pneumatic grease dispenser driven by an air compressor at each and every times stop of stump grinding, with a grease leading up, out in the area, making use of a typical hand-held grease pump. I use a wonderful offer of grease but it is much cheaper than alternative bearings. When I re-grease bearings, I completely purge out the contaminated grease, till clear grease exudes from the bearing. A substantial melting position EP-2 grease is important. fag bearing desire a molybdenum disulphide (moly) enriched EP-2 complicated grease due to the fact it is a heavy-responsibility grease. So, to sum up this paragraph, there are 3 principles of maximizing bearing existence insofar as lubricants are concerned:
decide on the right grease
utilize the appropriate grease appropriately e.g in the correct amount
re-grease usually
A 2nd widespread explanation for premature bearing dress in on stump grinders is inadequate or incorrect bearing adjustment ( for individuals equipment with an adjustable bearing use takeup) Now, I know how uncomfortable accessing bearings for adjustment, can be on stump grinders. I made up some specialised equipment out of allen keys, owing to their tough, substantial top quality metal content, as a function close to to the awkward obtain issue I have on my grinder. I basically ground away excessive content with a bench grinder to form an allen important into a correct-angled punch. If you are cozy doing this, you should be sure to frequently amazing the allen crucial in water. Do not permit it turn blue in color. I arrive from an engineering qualifications, and accept that a lot of who may read through this, do not. Numerous may possibly come to feel this to be considerably out of their depth. This is why I’m creating this hard work to keep away from technicalities as significantly as feasible with emphasis on minimal salient factors. I’m not conversant with bearing entry configurations on all brand names of stump grinders, but I can’t in excess of emphasis how, with a bit of initiative and determination, the significance to overcome a bearing obtain difficulty is. It will conserve you cash.
The detection and evaluation of untimely bearing failure is by its nature a technological subject involving specialised gear e.g. heat sensors, vibration sensors, infrared sensors, oil and ultrasound examination products. All of this tools generates a wonderful offer of info, is extremely high priced, and entirely impractical out in the subject. A non specialized tree stump grinder who is dependent upon the continual procedure of his stump grinding machine will effortlessly be place off by this circumstance. The simplest, most practical and non complex way to roughly monitor bearing overall performance is to rest your hand on the pillow block bearing soon after running it for a reasonable duration of time, say at minimum a single hour. If you need to get rid of your hand because the bearing is as well scorching, this suggests a worn bearing. Adjustment to just take up extreme engage in in the bearing be made in accordance with manufacturers recommendations. If the sound of a bearing “knock or rumble” is also read, this usually means it is excessively worn and wants substitution. For those who my be interested, there are four phases of bearing failure which I will touch on, as it does get involved and is not in trying to keep with this scope and its aim.:
Phase 1. Vibration evaluation detects the earliest indication of bearing failure. Sign information appears in the ultrasonic frequency selection band all around 250 to 350 Kilo Hz.. At this stage there is about ten-twenty percent remaining bearing life.
Phase 2. Bearing failure begins to “ring” at its organic frequency (500 – 2000 Hz) At this level there is 5 to ten% bearing life remaining.
Stage three. bearing failure harmonics are clear with defects in the inner and outer races. Temperature improve is now clear with 1 to 5% bearing life still left
Stage four. High vibration is obvious with random ultrasonic sounds drastically increased, temperature boosts swiftly. A single hour to one % remaining daily life.
It is unlucky for all stump grinder operators, that by the time a bearing knocks, rumbles, or noticeably heats up, it is shortly on its way to failure. There is no functional way for the regular operator / operator to accurately decide the size of serviceable time remaining in a stump grinders bearing even though out in the field.
From this viewpoint, I am creating an attempt to try out to collect some useable knowledge out in the discipline, which may possibly demonstrate to be a functional and affordable way to check bearing serviceability. I will be setting up thermocouples (heat sensors) to the bearings. If a working typical temperature gradient can be proven, it could show useful to those stump grinders who are concerned with maximizing their equipment bearing existence, by basically adjusting up their bearings, when its temperature rise signifies time to do so. This will need some energy on the portion of individuals intrigued. They way too will need to have to fit thermocouples to their bearings to monitor temperature as the only price-powerful, and functional way to know when to modify up their bearings.
This effort will be completely negated if a rigid and sufficient re-greasing system is not taken care of. What would be the point of standard, timely, bearing changes, if the bearings regularly ran in a mattress of contaminated grease. I feel the reader will concur, is a whole waste of time and work.