[4]

Correct taper name ?

[3]
[10] Like what you see?
Click here to donate to this forum and upgrade your account!

mmcmdl

H-M Supporter - Gold Member
Staff member
H-M Supporter - Gold Member ($25)
Joined
Jan 31, 2016
Messages
779
Likes
638
#1
This is an old Enco boring head with a 40 taper I believe . Is this called an MT 40 or what ? I can't remember !
 

Technical Ted

H-M Supporter - Gold Member
H-M Supporter - Gold Member ($25)
Joined
Nov 5, 2016
Messages
680
Likes
673
#2
This is an old Enco boring head with a 40 taper I believe . Is this called an MT 40 or what ? I can't remember !
There's no picture, but maybe a CAT40? MT means Morse Taper usually...

Ted
 

BaronJ

Brass
Registered
Joined
Aug 7, 2018
Messages
660
Likes
334
#3
Hi Dave,

A 40 taper is a non locking taper ! A Morse taper is the opposite, a locking taper.
You are probably referring to a NMTB 40 quick change taper.

1543855306699.png
 

JimDawson

Global Moderator
Staff member
H-M Platinum Supporter ($50)
Joined
Feb 8, 2014
Messages
7,254
Likes
5,548
#4
Could be an NMTB 40 or Cat 40 And I think there is another that I can't remember.
 

mmcmdl

H-M Supporter - Gold Member
Staff member
H-M Supporter - Gold Member ($25)
Joined
Jan 31, 2016
Messages
779
Likes
638
#5
Well heck , no pic ! :rolleyes:
 

mmcmdl

H-M Supporter - Gold Member
Staff member
H-M Supporter - Gold Member ($25)
Joined
Jan 31, 2016
Messages
779
Likes
638
#6
This is it . The mind is always second to go ! Yes , this mill had a draw bar type system , 30 years ago ! Not new , no retention knobs or such .
 

Attachments

JimDawson

Global Moderator
Staff member
H-M Platinum Supporter ($50)
Joined
Feb 8, 2014
Messages
7,254
Likes
5,548
#8
OK, that is an NMTB 40
 

mmcmdl

H-M Supporter - Gold Member
Staff member
H-M Supporter - Gold Member ($25)
Joined
Jan 31, 2016
Messages
779
Likes
638
#9
Thanks Jim , found it in one of my drawers . :grin:
 

JimDawson

Global Moderator
Staff member
H-M Platinum Supporter ($50)
Joined
Feb 8, 2014
Messages
7,254
Likes
5,548
#10
Correction: I think that is an NMTB 30, looks too small for a 40
 

benmychree

John York
H-M Supporter - Gold Member ($25)
Joined
Jun 7, 2013
Messages
2,571
Likes
1,888
#11
30 or 40, appearances are relative to the size of the boring head, some scale or measurement is necessary to determine number, but having said that, that computer plug in must be awful big to call it a 40 ------ perhaps 30 is more likely, a 30 measures about 1 1/4" diameter at the big end, a 40 measures about 1 3/4" diameter at the big end, and yes, it is the NMTB designation. CAT would have a big vee groove in the flange, which is absent in this example. The NMTB type tapers go down as small as #5, and up to #60.
 

mmcmdl

H-M Supporter - Gold Member
Staff member
H-M Supporter - Gold Member ($25)
Joined
Jan 31, 2016
Messages
779
Likes
638
#12
Gotta be a 40 as I thought . 1.730 diameter at the large end .
 

NortonDommi

Active Member
Registered
Joined
Nov 15, 2016
Messages
361
Likes
243
#13
BaronJ nailed it NMTB commonly called NT.
Here's some info on tapers from 'Machinery's Handbook'.
 

Attachments

Cooter Brown

H-M Supporter - Gold Member
H-M Supporter - Gold Member ($25)
Joined
Nov 23, 2017
Messages
372
Likes
597
#14
NMTB30,40,50 tapers can also be listed as ISO30,40,50.....
 
[6]
[5] [7]
Top