9x20
Lathe Mandrels & Arbors
Last updated on
Wednesday, January 30, 2013 07:01:12 AM
Eastern US Time Zone
Mandrel Set, Specifications, Using a Mandrel, Expanding Arbors, Tapered Lathe Mandrels
Mandrel Set
Continuous size range from
½" to 2" inside diameter
(ID). Bottom to top numbered (on the flat) 1
through 8.
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.
The flat can be clamped by a
lathe dog
when turning
in-between centers.
Hardened & precision ground, throughout.
| EXPANDING LATHE MANDREL SET SPECIFICATIONS | ||||
| # | ID RANGE (in) | SHANK (in) | SLEEVE (in) | LENGTH (in) |
| 1 | ½ ~ 9⁄16 | ½ | 2½ | 5 |
| 2 | 9⁄16 ~ 21⁄32 | 19⁄32 | 2¾ | 6 |
| 3 | 21⁄32 ~ ¾ | 21⁄32 | 2¾ | 6 |
| 4 | ¾ ~ ⅞ | ¾ | 3¼ | 7 |
| 5 | ⅞ ~ 1 | ⅞ | 3¼ | 7 |
| 6 | 1 ~ 1¼ | 1 | 4 | 9 |
| 7 | 1¼ ~ 1½ | 1¼ | 4 | 9 |
| 8 | 1½ ~ 2 | 1½ | 5 | 11½ |
#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
in-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.
Expanding Arbors
Eight expanding
arbors ¼" to 1¼". Mount in the lathe, expand with the screw, & then
machine to size.
Tapered Lathe Mandrels
Small, tapered lathe mandrels in ⅛"
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 the dog.
Made of hardened tool steel precision ground to size.
Mandrel Set, Specifications, Using a Mandrel, Expanding Arbors, Tapered Lathe Mandrels