9x20 Lathe Mandrels & Arbors
Last updated on Saturday, February 13, 2021 05:06:00 AM Mountain US Time Zone

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Mandrel Set, Specifications, Using a Mandrel,
Expanding Arbors,
Tapered Lathe Mandrels

Mandrel Set

Continuous size range from
1/2" to 2" inside diameter (ID).
Numbered on the flats, 1 through 8, shown bottom to top.

There are two parts per mandrel; a tapered arbor &
a matched flexible sleeve. The large end has a short,

straight shank allowing it to be mounded into a collet.
Both ends have been centered drilled to accomodate centers.
The flat can be clamped by a
lathe dog & driven by a face-plate,
when turning between centers. Hardened & precision ground.

EXPANDING LATHE MANDREL SET SPECIFICATIONS
# ID RANGE (in) SHANK (in) SLEEVE (in) LENGTH (in)
1 1/2 ~ 9⁄16 1/2 2-1/2 5
2 9⁄16 ~ 21⁄32 19⁄32 2-3/4 6
3 21⁄32 ~ 3/4 21⁄32 2-3/4 6
4 3/4 ~ 7/8 3/4 3-1/4 7
5 7/8 ~ 1 7/8 3-1/4 7
6 1 ~ 1-1/4 1 4 9
7 1-1/4 ~ 1-1/2 1-1/4 4 9
8 1-1/2 ~ 2 1-1/2 5 11-1/2


#1 through 5 mandrels.


Mandrels #6, 7, & 8 have two sleeves each to
enable continuous coverage of their ranges.


End view of the largest, #8 sleeve.
The inside taper matches that of the arbor.

Using a Mandrel

An expanding mandrel shown mounted using a collet &
a live center. All of them can also be mounted

between centers & driven with a lathe dog.
Tighten & loosen by tapping on the sleeve with a hard

plastic-faced mallet. This part example has a non-standard
39/64 (0.6054" or 15.377mm) inside diameter.


A 0.12" thick brass disk with a 1" hole.

Expanding Arbors

Eight expanding arbors 1/4" to 1-1/4".
Mount in the lathe, expand with the
screw, & then machine to size.

Tapered Lathe Mandrels

Small, tapered lathe mandrels in 1/8" to 15/32" by
1/32" sizes. Held between centers & driven with a dog.

Standard taper of 0.0005″ per inch with the size marked
at the larger end where a flat is provided for a lathe dog.

Made of hardened tool steel precision ground to size.


Mandrel sizes available 1/8" to 3" by 1/32".

 

 

 

 

 

 


Expanding Mandrel Set, range 1/2" to 2"
Individual sizes also available.

 
 
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Mandrel Set, Specifications, Using a Mandrel,
Expanding Arbors,
Tapered Lathe Mandrels

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