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whats the purpose of a brush cutter
- Thread starter stanmondz
- Start date
Charlie-III
I wanna be Dave
Different diameter cutters can fit any brush to a certain diameter comm (there are 3 typical diameters). This means you can cut brush inventory down if you run many types of motors.
You can also use a cutter to resurface a brush when you cut a comm.
You can also use a cutter to resurface a brush when you cut a comm.
marzzz23
Rock Crawler
its also to serrate or cut a slot to provide more surface area for the brush on the comm....more contact equals more power,torque, etc etc depending on what you do to them.
That is a Brush Doctor, which is a bit different than a brush cutter. A cutter cuts serrations on the brush, the Doctor grinds a new face on the brush.
Typically I'll just bump mine up against the stone to clean the face up, or if I'm doing a junkyard rebuild, reshape the face to make better contact with the comm if it appears its wearing heavily on one edge or the other.
EddieO
I wanna be Dave
Post a pic of what you have and I will tell you what it is....there were MANY things like this out there...
Unless its cutting new serrations, most of the stuff out there doesn't have much use in crawling. I've tried lots of cuts and such on brushes.....while the results show up on the Dyno, they have little effect out on the rocks...except on drag brake, as reducing the surface area of the brush always effects the break.
I may mess more with cuts in the future....maybe when I actually have time to! Finally taking a weekend off, Emerald City Comic Con this weekend!
Later EddieO
Unless its cutting new serrations, most of the stuff out there doesn't have much use in crawling. I've tried lots of cuts and such on brushes.....while the results show up on the Dyno, they have little effect out on the rocks...except on drag brake, as reducing the surface area of the brush always effects the break.
I may mess more with cuts in the future....maybe when I actually have time to! Finally taking a weekend off, Emerald City Comic Con this weekend!
Later EddieO
Yup, same thing I've got.
EddieO
I wanna be Dave
I think we have some mislabeled stuff here.
Your unit is a racetech unit, which looks to be the brush shaper by the pic if I am seeing the bit right. They also made a brush serrator that looks identical except the different bit.
For Brush tools, we had serrators, shapers, and a cutters.......along with COMBO units that did mulitple.
A shaper will basically do just that, it will reshape the face of the brush to a set radius. We often used these to resurface the worn faces of the brush, but also could use them to speed up break in or prepare a brush for a larger comm....
A serrator does something similar to the shaper, but at the same time installs serrations into the brush. No serrations you do will EVER be as good as the stock ones.
A cutter cuts! A cutter is used to put different style cuts into the brush. A h-cut, x cut, horizontal cut, vertical cut, timed cut (BS in most cases), etc. People tried every cut you can think of.....these typically used a dremel disc of some sorts to accomplish the task. I always enjoyed watching idiots trying to use a dremel itself to cut a brush....talk about SAFE!
And for the record, there is 7.5mm and 9mm shaper and serrator tools, but I've never seen a 10mm tool of any type. The 10mm comm was never used in racing....only reason it exists in crawling is it was termed request on the initial order of teardowns.
Later EddieO
Your unit is a racetech unit, which looks to be the brush shaper by the pic if I am seeing the bit right. They also made a brush serrator that looks identical except the different bit.
For Brush tools, we had serrators, shapers, and a cutters.......along with COMBO units that did mulitple.
A shaper will basically do just that, it will reshape the face of the brush to a set radius. We often used these to resurface the worn faces of the brush, but also could use them to speed up break in or prepare a brush for a larger comm....
A serrator does something similar to the shaper, but at the same time installs serrations into the brush. No serrations you do will EVER be as good as the stock ones.
A cutter cuts! A cutter is used to put different style cuts into the brush. A h-cut, x cut, horizontal cut, vertical cut, timed cut (BS in most cases), etc. People tried every cut you can think of.....these typically used a dremel disc of some sorts to accomplish the task. I always enjoyed watching idiots trying to use a dremel itself to cut a brush....talk about SAFE!
And for the record, there is 7.5mm and 9mm shaper and serrator tools, but I've never seen a 10mm tool of any type. The 10mm comm was never used in racing....only reason it exists in crawling is it was termed request on the initial order of teardowns.
Later EddieO
Scattman
Official Cook of the ECC
Yep, got one of those as well.
Manning
RCC Addict
I only use my cutter/shaper/surfacer thingy to change standups to laydowns or vice versa.
I use mine to serrate a brush from a motor that I just did a comm skim on for faster break in so the brush's arc matches the smaller diameter of the comm faster. And to serrate new brushes, again for faster break in to become a fully seated, full faced brush sooner.
I tried slices and cuts of varying sorts, and saw no difference out on the rocks or trails, and just figured I'm wasting brush lifespan, which I may be doing with the quick serration hits also, but in my mind, they make sense so I do them.
Mines looks likes this.
I tried slices and cuts of varying sorts, and saw no difference out on the rocks or trails, and just figured I'm wasting brush lifespan, which I may be doing with the quick serration hits also, but in my mind, they make sense so I do them.
Mines looks likes this.
Attachments
igbandy
Pebble Pounder
I use the same device as mr eepee to serrate brushes, I also have some of the fuzzybrush items that do the same job as well.
I too have experimented with cuts to the brushes and I didnt find that it helped much. However the one thing that I did that seems to make the motor smoother and just feel better is to use a slapmaster tool to drill a hole down the dead centre of the brush.
I too have experimented with cuts to the brushes and I didnt find that it helped much. However the one thing that I did that seems to make the motor smoother and just feel better is to use a slapmaster tool to drill a hole down the dead centre of the brush.
