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Keystone Gear Boxes
CUSTOM-BUILT
HYPOID GEAR
DRIVE SYSTEM
QW3-4.88-DOS
Short Input
QW4-6.14-DOS
Long Input
“Silos Since 1901 – Unloaders Since 1963”
Keystone Gear Boxes
Keystone’s Custom Built Hypoid Gear Boxes are a result of years of research and development.
They have an outstanding design and are built with state of the art manufacturing machinery by
workmen with many years of experience. Keystone’s Hypoid Gear Boxes are engineered and
built with precision and close tolerances to perform reliably and quietly in rugged applications
and conditions. All gear box housings are built with high tensile ductile iron and are available in a
multiple range of ratios. Custom output shaft configurations are designed and built for site specific applications. Synthetic oil is used to provide maximum protection and performance under
the most demanding conditions.
Series QW Gear Box Dimensions
Keystone QW3-DOS
Keystone QW4-DOS
Weight: 350 lb.
Weight: 460 lb.
7
16
.781 Typ
2
8
215
16
35 21
4
3 INPUT
28
3
5
616
2 15
16
10 21
5 21
5
12 16
7
68
7
38
29 41
36 3
8
5 21
5
13 8
Silo Unloader Applications - 10' - 40' Diameter
K
Keystone QW3-DOS in a Chain Drive 300 Series Industrial Silo Unloader
K
Keystone QW4-DOS in a Top-Mount Direct Drive 400 Series Industrial Silo Unloader
Ratings
Ratings
Hypoid
Gear
Boxes
WEAVER
Keystone
Hypoid
Gear
Boxes
RATIO
4.88
6.14
RPM
RPM
(Pinion Gear)
(Ring Gear)
540
1000
1800
110.65
204.91
368.85
540
1000
1800
87.94
162.86
293.16
TORQUE
“Q”
(Ring Gear)
(Ring Gear)
17,715
2.258
17,513
2.284
Bending Stress
(P.S.I.)
HP
Rating
40,000
40,000
40,000
31.10
57.59
103.67
40,000
40,000
40,000
24.43
45.25
81.46
Keystone Gear Boxes
EXPLODED VIEWS
QW4-6.14-DOS
Long Input
QW3-4.88-DOS
Short Input
“Silos Since 1901 – Unloaders Since 1963”
Keystone Silo Systems Dealer:
SILO SYSTEMS, INC
P: 1-941-750-6156
C: 1-717-507-2235
www.keystonesilos.com
sales@keystonesilos.com
6156 9th Avenue Circle NE, Bradenton, FL 34212
The information contained herein is general in nature and is drawn from sources deemed to be reasonably reliable. Any application to a particular operation requires the
advice of qualified experts and is subject to limitations of good management, weather and other conditions present at the individual location. Keystone Silo Systems assumes
no responsibility whatsoever for the design or integrity of any structure or plant its equipment is installed or operated in. The liability of such structure or plant is the exclusive
responsibility of the operator and or owner. This also applies to any and all operations of Keystone Silo Systems beyond their intended use and warranty limitations. Company
reserves the right to change specifications and designs without notice. This literature cancels and supercedes all previous literature on this subject.
Catalog No. KGS-1201 Copyright 2012 Printed in USA