Thread: NT30 spindle vendor for RF45 mills?

Sorry about that, all cleared up now.

The place is Machine tool warehouse, and they are around $100 for the spindle.
https://www.machinetoolswarehouse.co...e-p-16133.html

Dave

Link to spindle

https://www.machinetoolswarehouse.co...e-p-16261.html

Dave

Thanks Dave! I have been hunting one of these for a while..

Not a problem, glad I could help.
A guy over on the candle power forum just converted one to a BT with a pull stud set up, but I think you need to be a member to see it.

Dave

Originally Posted by Dave J

Not a problem, glad I could help.
A guy over on the candle power forum just converted one to a BT with a pull stud set up, but I think you need to be a member to see it.

Dave

Now that is very interesting. I might have to dig out my old membership.

Sending pm.

Dave

HI,
That is a great find Dave . I wonder if it would fit the TopTech DM45 Mill Drills ?. Out of interest variant22 what Taper is on Your Mill ? , mine is R8. The trouble with the Seller being in Cananda is that the Postage is Expensive from there to here. Is ISO 30 Taper self releasing like the R8 ?.

Originally Posted by steran50

Is ISO 30 Taper self releasing like the R8 ?.

If I can but in with a question?
Self releasing taper? The 2 mills I have experience with ( HM 52's -one had R8 and the other SO 30) had a long draw bolt

Both required me to back off the bolt with a spanner and then apply violence to the head of said bolt, through a soft hammer to release the tool from its taper.
Does that fall under the meaning of "self releasing" or am I missing the meaning of this term?

I too , am hoping that the available replacement might fit a locally available RF clone. A RF45 clone would come within my budget and space requirements if it had a ISO spindle or (second best ) an R8 spindle.

I have lusted for a RF clone for a while but discounted the locally available models as they were Morse taper spindles.

Now that that a replacement spindle could be available, I might be back in the game.


Thanks

Grahame

Hi Guys, they have been available for a year or two now.
They would be available direct from China and would be cheaper to buy a box of 5 or so, you would just need to contact one of the machine builders there, preferably in Chinese as they get confused translating.

With the 30 taper, I use a Chinese's 22mm open end ring spanner. I use the open end to undo the draw bar as it's square and it only takes a tap with the the open end to come out.
To do it up it only takes a thump on the ring end with your palm of your hand.

When they are set up as a BT with a stud, the air cylinder pushes it out.

Dave

Originally Posted by Grahame Collins

If I can but in with a question?
Self releasing taper? The 2 mills I have experience with ( HM 52's -one had R8 and the other SO 30) had a long draw bolt

Both required me to back off the bolt with a spanner and then apply violence to the head of said bolt, through a soft hammer to release the tool from its taper.
Does that fall under the meaning of "self releasing" or am I missing the meaning of this term?

I guess it depends on the level of 'violence' applied. Yes, I have to give my R8 taper machine a firm tap to get it to release. Much less force than a Morse taper though. ISO 40 taper, often it'll drop free - I'm tempted to say always, but not so with mine.

As I've said elsewhere, both the Morse and R8 transmit torque due to the taper friction fit so the taper is performing both alignment and drive. With the ISO tapers, the taper *only* performs alignment, and controls depth of insertion as well. Drive is via the spindle dogs fitting into the taper shank slots.

If you ever want to have the ability to swap out tools with known repeatability, the ISO taper is the way to go. Someone said they had an R8 taper CNC mill. I bet they don't have a tool changer on it.

I'm kind of tempted to buy one of these spindles so I have one in search of a problem.

PDW

Originally Posted by PDW

I'm kind of tempted to buy one of these spindles so I have one in search of a problem.
PDW

Funny, I was thinking along similar lines, I'd be thinking along the lines of cutting splines on it so I could fit one to the drill press, then of course I could always fit a NT30 to MT3 adaptor for the odd times when I want to use a morse taper drill bit. Mostly it would just have a drill chuck, but, it might be handy to be able to use the NT30 boring head when the mill is setup for other stuff...

The ability to use ER32 collets on the drill press might be a handy thing as well....

Regards
Ray

Instead of this guy getting an over load of emails from Australia asking for postage prices, maybe one member could ask and post it here.

Also it would be cheaper to send 2-3-4 spindles together surely, so if those that want them could post or PM others they could see if another members are in the area to save on postage.

I don't see this as a group buy, but just to see if any other members here are interested and then if they are do it though email off the forum.

Dave

Heading further on the self releasing tangent, I always find the ISO 30 to come out with a light tap. But the 40 has taken considerably more to get it free. Maybe I'm overdoing the drawbar, but a few times now I've had to reach for a hammer, the spanner won't do a thing. Is there a torque spec for drawbars? Just so I can see if I'm in the ballpark?

Originally Posted by PDW

I guess it depends on the level of 'violence' applied. Yes, I have to give my R8 taper machine a firm tap to get it to release. Much less force than a Morse taper though. ISO 40 taper, often it'll drop free - I'm tempted to say always, but not so with mine.

As I've said elsewhere, both the Morse and R8 transmit torque due to the taper friction fit so the taper is performing both alignment and drive. With the ISO tapers, the taper *only* performs alignment, and controls depth of insertion as well. Drive is via the spindle dogs fitting into the taper shank slots.

If you ever want to have the ability to swap out tools with known repeatability, the ISO taper is the way to go. Someone said they had an R8 taper CNC mill. I bet they don't have a tool changer on it.

I'm kind of tempted to buy one of these spindles so I have one in search of a problem.

PDW

You and I both understand tapers that but many of the engineering kids, I taught, suffered a severe lack of cognitive ability. To them," just nip it up" meant tighten the draw bar till your eyeball pops, hence a great deal of difficulty for yours truly in removing the ER collet fixture for a face mill to be used. In the case of the R8, they totally unthreaded the draw bar from the R8 spindle and the beat the be jesus out of the end of the then separated draw bar thereby deforming the opposite threaded end to a point of it being unusable. The spindle was hard enough not to be damaged.

Back on track. I sent an email (job ticket ) enquiring the postage shipping on 4/5 units.

Grahame