Re: 14-1/2 spindle nose and taper


Most South Bend used a .602 taper which is not a MT4.5.  It is propitiatory and unique to SB.

On Sunday, May 29, 2022, 04:15:52 PM CDT, mike allen <animal@...> wrote:

        I might be thinking that South Bend was a pretty large factor in the early days of the Machinery Handbook& maybe it was included in teh book cause there were/are so many of them out

        there ? Or I could just be pounding sand ?


On 5/28/2022 10:28 PM, rlm_mcv via wrote:
I am surprised it is listed in 1957.  That is nearly 100 years after the Morse standards were created.  We don't know when it showed up but seems relatively new compared to the original standards with the info that has be expressed so far.  It would be interesting to find why for sure that 1/2 size was created latter too, rather than having to speculate.

On Sunday, May 29, 2022, 12:19:42 AM CDT, wlw19958 <wlw-19958@...> wrote:

Hi There, 

My SBL Tooling Spec Sheet lists two sets of specifications for the 14.5"
lathes.  There is the 14.5" - 3/4" collet and the 14.5" - 1-1/16" collet. 

The specs for the 14.5" - 3/4" collet has a gage line of 1.325",
and a Taper per inch of .602". 

The specs for the 14.5" - 1-1/16" collet has a gage line of 1.629",
and a Taper per inch of .602".

As to the Morse 4-1/2 taper,  It isn't listed in the Morse Taper chart but
in my Machinery's Handbook 15 Ed. (1957) page 1416 under standard
tapers is table #5 - American Standard Self-holding Tapers - Basic Dimensions
(ASA B5.10-1953), it lists a 4&1/2 taper under the Morse Taper Series.  It is
listed as having a Taper per Inch of 0.62400" and a Gage line of 1.50000".

So, I don't think that using the 4&1/2 Morse taper designation is particularly

Good Luck!
-Blue Chips-

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