Stearns 1-087-3XX Catalog Page
Series 87,300-00 and 87,300-02
(1-087-3XX) Motor Mounted
Division I Hazardous Location
Mounting Face: NEMA 182TC, 184TC,
213TC, 215TC, 254TC, 256TC
8.5” AK, 7.25” AJ
Static Torque: 10 through 105 lb-ft
Enclosure Material: Cast Iron
Release Type: Knob
Modification required for vertical above
mounting. For vertical below, modification
required on 50-105 lb-ft. See SAB
Modification Section..
• Self-Adjusting Design
• Epoxy Encapsulated Coil Construction,
with Class H Insulation
• NC Thermostat
• Spring-Set Electrically Released
• Lead Wire Length: 36 inches
• Maximum Speed: Horizontal 4000 rpm,
Vertical 3000 rpm
• ABS Type Approval Certified.
Brake set and release times in milliseconds,
when brake and motor are switched separately
(for T1/T2 definitions, see page 101):
Static Torque Coil Size T1 T2
10, 15, 25, 50 5 & 6 42 20
35, 75, 105 8 48 20
Hazardous-location brakes are intended essentially for non-cyclic or holding
purposes, but may be used for stopping light inertial loads.
Series 87,300-00
Enclosure Protection: Type 1/IP 40, Type 4/IP 55, or Type 4/IP 57 protection, the brake must be mounted close coupled to the motor end
bell (a motor frame adapter may be included). Hazardous Location NEMA 7, 9.
Mounting Requirements: 1-087-3XX-00 Series Hazardous Location Motor Mounted Brake is recommended for mounting close coupled
(directly) to the motor end bell. If the brake is to be mounted to a motor fan guard, or if a motor frame adapter is incorporated, it is
recommended that Series 1-087-3XX-02 be used, as it provides additional bearing support for the longer shaft that is required. The
acceptability of the brake and motor combination must be determined by Underwriters Laboratories Inc.
Certified: UL Listed, File E-14893 for Class I, Group C and D and Class II, Group F and G.
CSA Certified, File LR-9584 for Class I, Group C and D, and Class II, Group F and G.
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Installation and Service Instructions: P/N 8-078-927-03
Parts List: P/N 8-078-917-03 for IP 40 8-078-917-23 for IP 55
Outline Drawing for IP 40 & 55
Dimensions for estimating only. For installation
purposes request certified prints.
32
Dimensional Data
Model
Number
1-087-311-00-XXX IP 40
1-087-314-00-XXX IP 55
1-087-321-00-XXX IP 40
1-087-324-00-XXX IP 55
1-087-331-00-XXX IP 40
1-087-334-00-XXX IP 55
1-087-341-00-XXX IP 40
1-087-344-00-XXX IP 55
1-087-351-00-XXX IP 40
1-087-354-00-XXX IP 55
1-087-361-00-XXX IP 40
1-087-364-00-XXX
1-087-381-00-XXX IP 40
1-087-384-00-XXX IP 55
Enclosure
IP 55
Nominal
Static Torque
(lb-ft) (Nm)
10
(14)
15
(20)
25
(34)
35
(47)
50
(68)
75
(102)
105
(142)
Dimensions in Inches
(Dimensions in Millimeters)
AAEAGC
9.34
(237.33)
9.34
(237.33)
9.34
(237.33)
9.34
(237.33)
9.34
(237.33)
9.34
(237.33)
10.34
(262.73)
3.22
(81.79)
3.22
(81.79)
3.22
(81.79)
3.22
(81.79)
3.22
(81.79)
3.22
(81.79)
4.22
(107.19)
2.25
(57.2)
2.25
(57.2)
2.25
(57.2)
2.25
(57.2)
2.25
(57.2)
2.25
(57.2)
2.75
(69.9)
2.76
(70.1)
2.76
(70.1)
2.76
(70.1)
2.76
(70.1)
2.76
(70.1)
2.76
(70.1)
3.73
(94.7)
SL
± .05”
2.56
(65.0)
2.56
(65.0)
2.56
(65.0)
2.56
(65.0)
2.56
(65.0)
2.56
(65.0)
3.53
(89.7)
Weight
lbs
(kg)
62
(28.0)
63
(28.6)
63
(28.6)
63
(28.6)
64
(29.0)
65
(29.5)
72
(32.7)
Series 87,300-00
Enclosure Protection: IP 57
Certified: UL Listed, File E-14893 for Class I, Group C and D and Class II, Group E, F and G.
BACK TO T ABLE OF CONTENTS
Dimensional Data
Model Number Enclosure
1-087-318-00-XXX IP 57
1-087-328-00-XXX IP 57
1-087-338-00-XXX IP 57
1-087-348-00-XXX IP 57
1-087-358-00-XXX IP 57
1-087-368-00-XXX IP 57
1-087-388-00-XXX IP 57
Nominal
Static
Torque
lb-ft
(Nm)
10
(14)
15
(20)
25
(34)
35
(47)
50
(68)
75
(102)
105
(142)
Dimensions in Inches
(Dimensions in Millimeters)
A C SL AE G
11.57 2.76 2.56 3.22 2.25
11.57 2.76 2.56 3.22 2.25
11.57 2.76 2.56 3.22 2.25
11.57 2.76 2.56 3.22 2.25
11.57 2.76 2.56 3.22 2.25
11.57 2.76 2.56 3.22 2.25
12.57 3.73 3.53 4.22 2.75
Wt.
Lbs
(kg)**
63
(28.6)
64
(29)
64
(29)
64
(29)
65
(29.5)
66
(30)
73
(33.1)
33
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