Dings Dynamics Group 70 Series Coupler NEMA 4X - Manual (Page 2)

MANUAL RELEASE
(See Figure 4)
To operate release, rotate two nuts (16) clockwise until stop
screw (14) hits pin. Brake will remain in released position until rods
are manually returned to original position, or until electrical power
is restored, automatically resetting the brake.
TORQUE ADJUSTMENT
(See Figures 2 & 4–Table 1)
Brake is factory set for rated torque per spring length “H”. To increase
stopping time and lower torque, turn two locknuts (9) counterclockwise,
increasing dimension “H”. Both springs must be set to the same length.
Do not decrease spring length “H” as this may cause coil to burn out.
MAINTENANCE AND SERVICE
WEAR ADJUSTMENT
(See Figures 2 & 4– Table 1)
Magnet gap “D” increases as friction discs wear. When gap approaches
“D” max., adjust gap to “D” min. dimension by turning nuts (23 and 24).
Magnet gap can vary from nominal + .005” between corners. After
setting gap, readjust torque spring length “H”.
CAUTION: MAGNET GAP MUST NOT EXCEED
“D” MAXIMUM.
FRICTION DISC REPLACEMENT
(See Figure 4 & Table 1)
When the rotating friction disc (4) wears down to a thickness of 7/32”,
replace disc. Remove brake from its associated equipment (reducer-
motor-etc.). Remove retaining ring (28) and press shaft (1) out of
bearing in brake case (25). A wheel puller, utilizing openings in side of
case, can be used. Continue disassembling in this order: two nuts (26),
brake case (25), roll pins (17), manual release knobs (16), manual
release screws (14), manual release washers (12), manual release
shims(13), two nuts (24), magnet mounting plate assembly (18), two
nuts (23), two nuts (9), torque spring washers (8), torque springs (7),
pressure plate assembly (6) and discs (4) (5).
Lay bracket (2) on a flat table. Place shaft (1) in center of bracket, with
a spacer under hub. Spacer thickness to be 13/16”. Replace worn
friction discs (4) and reassemble disc pack. Continue reassembling in
reverse order, setting torque spring dimension “H,” and magnet gap “D”
min. (Table 1.). When assembling manual relase, turn release rod (10)
counter-clockwise until screw (14) strikes pin. Wind torsion spring (11)
about 1/4 turn and hook spring over pin.
NOTE :
When assembling manual release mechanism, add only
enough shim washers (13) to obtain proper release
action. With too many shim washers, brake will not
automatically reset when electrical power is applied.
With too few shim washers, motor shaft will not turn
freely with brake in manually relase position.
IMPORTANT: Make sure relase is working properly
before proceeding.
Place case (25) over shaft (1). Release brake by turning two nuts (16)
clockwise. Press bearing (in case) onto shaft by applying pressure to
bearing inner race. Complete assembly in this order: snap ring (28)
and two nuts (26).
NOTE:
Units with 1-3/8” dia. output shafts–remove brake case by
first removing outside retaining rin (41) and two nuts (26).
Then press shaft (1) out of bearing. Next remove
remaining retaining ring (41) and pull shaft out of brake.
MODEL
NUMBER
WASHDOWN
Torque
Lb.Ft.
No. of
Friction
Discs
Weight
lbs.
Thermal
Capacity
HPS/Min
Inertia
WK 2
LB-FT 2
DIMENSIONS
AC C
D
H
AH (Motor Shaft Length)
Max. Min.
1.125 Dia. 1.375 Dia.
Max. Min. Max. Min.
4-71010-105 10 1 45 11 .069
1.19 6.84
.07 .030 1.31
2.81 2.50
*1.81 *1.69
4-71015-105 15 1 45 11 .069 .07 .030 1.31
4-72025-105 25 2 49 12 .110 1.63 7.47 .07 .035 1.31 *2.44 *2.31
4-73025-105 25 3 53 13 .150 2.25 8.09 .07 .040 1.25 3.13 2.94
4-72035-105 35 2 49 12 .110 1.63 7.47 .07 .035 1.21 *2.44 *2.31
4-73035-105 35 3 53 13 .150 2.25 8.09 .07 .040 1.27 3.13 2.94
4-73050-105 50 3 53 13 .150 2.25 8.09 .07 .040 1.25 3.13 2.94
4-74075-105 75 4 57 14 .190 2.88 8.72 .07 .040 1.21 3.25 3.00
Figure 2. Outline Drawing
Table1. List of Models and Dimensions
*Std. NEMA Motor Shafts will have to be shortened.
2
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