S190
Starrett Little Giant Jack Screw
190 Series
2-1/4″–3-3/8″ / 57-85mm
191 Series
1-1/2″–2-1/4″ / 38-57mm
“Little Giant” Jack Screws are very handy for
leveling work on planer beds, upright drills,
setting up machinery, and for general use in
the toolroom or machine shop.
190 and 191 have 20-pitch screws and for
those who desire a finer adjustment, the F190
has a 40-pitch screw.
An auxiliary pointed screw (D) is supplied,
to be used in place of the screw with swivel
cap. Extension base (E) is furnished for places
where it is not possible to obtain a bearing on
a flat surface. Extension V base (F) is for use
against a cylindrical form.
| Specifications | 190 | 191 | ||
| Range | 2-1/4 – 3-3/8″ |
57-85mm | 1-1/2 – 2-1/4″ |
38-57mm |
| Maximum Height with Attachments |
6-3/8″ | 162mm | 3-3/4″ | 95mm |
| Jack (A) Base Diameter |
1-1/4″ | 32mm | 1″ | 25mm |
| Extension (B) | 2″ | 50mm | 1″ | 25mm |
| Extension (C) | 1″ | 25mm | 1/2″ | 13mm |
| 190 & 191 “Little Giant” Jack Screws |
|||
| Photo Key | Description | Catalog No. | Catalog No. |
|
Set Complete, with Fine-Adjusting
Screw and All Attachments |
SF190
|
||
|
Set Complete with All Attachments
|
S190
|
S191
|
|
|
A
|
Jack Only, with Fine-Adjusting Screw
|
F190A
|
|
|
Jack Only
|
190A
|
191A
|
|
|
B
|
Extension Base
|
190B
|
191B
|
|
C
|
Extension Base
|
190C
|
191C
|
|
D
|
Auxiliary Pointed Screw with Fine-
Adjusting Screw |
F190D
|
|
|
Auxiliary Pointed Screw
|
190D
|
191D
|
|
|
E
|
Extension Base
|
190E
|
191E
|
|
F
|
Extension V Base
|
190F
|
191F
|
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