Rotabroach cutters

[Zebbedee]

anyone care to recommend the best cutters and where to buy? Been buying genuine rotabroach ones on e-bay but fairly disappointed with them tbh so best suggestions please and before anyone mentions we always cut as slow as machine will go with proper cutting fluid as well thanks

 

[Deutzdx3]

Try some other makes. No guarantee they are genuine on eBay. I borrow one off a friend every now and then. I’ll find out what cutters he has. Never had an issue with them.

 

[nick...]

Got mine from magdrill.com
Nick...

 

[Dmc]

Magdrill.com

 

[Zebbedee]

Think the ones I have came from magdrill.com through eBay

 

[the-mad-welder]

If I need any extras I normally go here

https://www.orbitalfasteners.co.uk/en/categories/magnetic-drilling-cutters-accessories

They also do some tct ones that are good for certain jobs but you need to be careful with them but it sounds like you are. I re drilled some subsoiler legs which a normal one wouldn't touch with a tct bit and lots of patience and cutting fluid! The bit certainly paid for itself on that one job.

Your local saw sharpening place should be able to re grind them for not a lot if they do go blunt. I've had some that cut better once they have been sharpened than when they were new.

 

[Hesston4860s]

All mine except 1 are made by Evolution, they last well and cut well mostly used with sealey cutting oil.

Generally keep an eye on eBay and buy em if there cheap enough !.

 

[collie]

Screw fix last well and reasonable prices

 

[davidcardiff]

Highly recommend UNIBOR stuff they seem to last a long time if treated right and made in Sheffield
have started to use a couple of HMT tct tip ones for drilling stainless and they walk through it the one in the photo has drilled over 50 holes in stainless with no coolant or cutting compound

 

[Gus]

Evolution or Unibor. One breaks occasionally usually due to trying something where the magnet hasn't got enough to get hold of but I don't think I've ever blunted one enough to scrap it or get it sharpened.

If I need any extras I normally go here

https://www.orbitalfasteners.co.uk/en/categories/magnetic-drilling-cutters-accessories

They also do some tct ones that are good for certain jobs but you need to be careful with them but it sounds like you are. I re drilled some subsoiler legs which a normal one wouldn't touch with a tct bit and lots of patience and cutting fluid! The bit certainly paid for itself on that one job.

Your local saw sharpening place should be able to re grind them for not a lot if they do go blunt. I've had some that cut better once they have been sharpened than when they were new.

I'm interested by what you say about TCT cutters. I bought some to drill Hardox and each one lasted a hole and a half using slow speed and cutting fluid. At £70/each they were expensive holes.

 

[the-mad-welder]

Evolution or Unibor. One breaks occasionally usually due to trying something where the magnet hasn't got enough to get hold of but I don't think I've ever blunted one enough to scrap it or get it sharpened.



I'm interested by what you say about TCT cutters. I bought some to drill Hardox and each one lasted a hole and a half using slow speed and cutting fluid. At £70/each they were expensive holes.

Not sure exactly what the leg was made from but a regular bit wouldn't drill it but the tct one did with patience. They weren't cheap holes either but they were still cheaper than a new leg! There are various grades of hardox, perhaps you had one of the higher ones?

 

[milkloss]

Needed to drill the bucket edge to put on a new bolt on edge. TCT cutter from orbital wouldn’t touch it, not saying their cutters aren’t any good necessarily, perhaps our bucket edge was just really, really hard! Had to gas the holes in.

 

[Gus]

Not sure exactly what the leg was made from but a regular bit wouldn't drill it but the tct one did with patience. They weren't cheap holes either but they were still cheaper than a new leg! There are various grades of hardox, perhaps you had one of the higher ones?

Needed to drill the bucket edge to put on a new bolt on edge. TCT cutter from orbital wouldn’t touch it, not saying their cutters aren’t any good necessarily, perhaps our bucket edge was just really, really hard! Had to gas the holes in.

It would have been 400 or 500 grade. The cutter went really well to start with but as soon as it was blunt that was it, wouldn't cut with any amount of pressure.

@milkloss I've converted a few buckets to bolt on edges. I usually plasma cut a hole, weld a plug of mild steel in and then drill it. Not ideal but it seems to work.

 

[stablegirl]

Found the rotabroach drills distinctly average.

Bought a hmt tct as mentioned recently for a job and it wasn't in a different league!

 

[d20]

Found the rotabroach drills distinctly average.

Bought a hmt tct as mentioned recently for a job and it wasn't in a different league!

I use HMT TCT cutters every time, but remember TCT needs to cut at 30-50 M/min so don't run them too slow (unless you are cutting some hard plate)

 

[TripleSix]

I've a set made by Alfra Rotabest and they're pretty good.
I've had blunt bits that I've been gifted resharpened locally and they seem to work well.

I've a set of twist drills for the mag drill too, they don't see much work but are handy.

 

[madmatt]

I have a set of Rotabroach cutters i bought with my machine from magdrill and they are proving very good.

I admit to a schoolboy error this week purchasing a countersink bit off eBay i put it in the machine tonight and sunk one hole and the edge has gone totally looks like i am going to have to stomach the best part of 100 quid for one!