Routers

[jfc]

Anyone agree with this fella ?.............................

There's absolutely no need for variable speed. What you want is the fastest rpm (for the cleanest cut) and the most powerful (so you can feed it quick without the revs dropping). 1/4 shank bits are a complete waste of time, and you should know that you need TCT bits if you want to machine any composite board (chipbd, ply, mdf) or for the boat Teak. HSS cutters will go up in smoke before you know it, and vairable speed will make the problem worse.

I've owned routers from handheld trimmers of 300 watts up to the current 16kw with water cooling. Speed is always the fastest it'll go.

[engineerone]

what a load of cobblers. you need variable speeds to ensure that the peripheral speed of the bit is not too high to be safe.

as for the cutters, well it depends on the quality of the tct cutters as to whether they are better than hss for different woods/ mdf.

paul

[mailee]

Where on Earth was that posted? Cloud Cukoo land!?

[sainty]

I very rarely change the speed on my handheld routers. Occaisionally on the router table I might drop it a bit for something like my big mitre lock cutter. I probably(?) dont use a cutter, hand held, that needs the router to be slowed down.

rgds

Stu

[engineerone]

have you checked your speed charts sainty. it is surprising how quickly the rim speed increases with only a small increase in shaft speed. trend i know provide them.

other thought, of course the 6mm shank is about 15% stronger than the 1/4 since it is that much more meaty.

paul

[sainty]

speed what?

[engineerone]

sorry i forgot about reminding you about peripheral speeds ;D

actually, if you get a cmt catalogue, or a freud one, they give you maximum speeds for the cutters.

paul

[promhandicam]

Dec 1, 2008 22:41:58 GMT engineerone said:

snip . . . the 6mm shank is about 15% stronger than the 1/4 since it is that much more meaty.

paul

6mm dia is smaller than 1/4" which is 6.35mm - so how can it be 'more meaty' ?

Confused of Surrey ;D

[jfc]

Occaisionally on the router table I might drop it a bit for something like my big mitre lock cutter

And just how big is that ?

[jake]

My grecian ogee cutter from Wealden is 8k max.

[engineerone]

oops sorry steve, i did not look at my box of cutters from woodrat, where in fact it is the 8mm cutters which are proposed instead of 1/4 and they of course are bigger

paul.

[sainty]

Dec 1, 2008 23:29:42 GMT jfc said:

Occaisionally on the router table I might drop it a bit for something like my big mitre lock cutter

And just how big is that ?

3ft. Its my log cabin mitre bit.

[cuttingsolutions]

I have just replied on that thread:

OK...
From the professionals.....Titman, (www.titman.co.uk) who make the biggest range of cutters produced in the UK.

Safe RPM:
Cutter Diameter
1/8" - 1" = 24000 RPM
1" -2" = 18000 rpm
2" - 3" = 16000 rpm
3" - 4" = 12000 rpm

there are then a whole load of recommended feed rates for various diameter cutters at various rpm's...on the info pages of the website.

Jason.
Not replying to you obviously but it looks like we have someone dangerous spouting off on here. If you are talking CNC machines (which we are not) the figures might be quite different.

there is some VERY dangerous information given above!!!!!!!!



I can also supply a nice boxed set of 12 routers on 1/2" shank sorry dont have a picture and too busy to find one from someone elses site.....(45 Deg chamfer with bearing/ Rounding over bit R=1/4" with bearing/ cove bit R= 1/4" with bearing/ rounding over bit R=3/8" with bearing/ cove bit R=3/8" with bearing/ roman ogee bit R=1/4" with bearing/ straight 2 flute with bottom cut x 5/16"/ straight 2 flute with bottom cut x 5/8"/ flush trimming with bearing x 1/2" diameter/ cove bit (pencil groove) R=1/4"/ dovetail 9/16" and 60 degree Vee bit 19/32"
All for £22.00 +P&P + vat

Dave

[jfc]

Just seen that ;D That was cuttings reply . Not calling sainty dangerous ;D
That mitre lock cutter is 44mm isnt it ;D

[tusses]

so - wots the right speed for a 1" cutter ? 18 or 24 ! there's a huge difference there

[lynx]

the lower end i would say. You can usually hear if it's too low

[cnc paul]

It's all about chip load.

Using the correct revs for a given diameter of router cutter reduces wear on the cutter considerable.




Paul

[sainty]

Dec 2, 2008 13:04:07 GMT jfc said:

Just seen that ;D That was cuttings reply . Not calling sainty dangerous ;D
That mitre lock cutter is 44mm isnt it ;D

44mm's for wimps! Its this one part T5596-1/2

I think that I might review my router usage. Problem is, I always forget to check the speed.

rgds

Stu

[jfc]

You wont forget once you have had a cutter fly past your head because you forgot to check the speed

[Keith]

I recon if I have to slow a cutter down then it is better used in a table, even if the manufacturer doesn't specify table use only.

Decent quality large cutters normally have the max speed etched onto the shaft btw.