Nexen BTBA-10 927409 - Manual (Page 5)

FORM NO. L-21180-E-0111 5
INTRODUCTION
The Nexen BTBA is a tension control brake designed for shaftless unwinds. It is ideal for web control applications such as
corrugating and labeling or any application that requires web control.
The BTBA, a pneumatic brake, uses individual pistons to achieve different torque ranges. All pistons are the same size and
they each push on individual facings. The facings are quick change facings which are easily replaced in minutes. The brake
features an aluminum protective guard that covers the rotating parts of the brake. This guard also houses an electric fan
that cools the rotor and maintains a high thermal dissipation at low rotational speeds. The BTBA brake is shaft mounted
with a Taper-Lock
® bushing. Bore sizes that are under the model’s max bore size require a straight support bushing.
For Installation:
Phillips head screw driver
Mechanical press
7/32 inch Allen wrench or hex socket (BTBA-10)
1/4 inch Allen wrench or hex socket (BTBA-12)
10 mm Allen wrench or hex socket (BTBA-12)
8 mm Allen wrench or hex socket (BTBA-10)
For Air Line Connections:
7/16 inch open end wrench
For Friction Facing Assembly:
Insulated gloves
For BTBA Brake Replacement Assembly:
Phillips head screw driver
Retaining ring pliers (for both internal and external
retaining rings)
Mechanical press
6mm Allen wrench or hex socket (BTBA-10) - 8mm
(BTBA-12)
Safety Solvent
Loctite ® 242 and 680
Small clamp
Insulated gloves
For Fan Replacement Assembly:
Loctite ® 242
3mm Allen wrench
Insulated gloves
W
hat you Will need
:
A
K
(Approx.)
B C (2 at 180°)
Anti-rotation holes
3 Conductor Cable
18 AWG Wire
115 VAC, 61 W
Air Fitting Accepts
4.00 Tube
0.156 (5/32)
D
H
M
J
45.0° G
F
E
N
O
(2 at 180°) P
anti-rotation holes
Q
(BTBA-12 Shown)
Figure 1 / Table 1
BTBA-10 & -12 Approximate Dimensions mm
[in]
Model A B C D E F G H J M N O P Q
BTBA-10
ø240.00
[9.449]
10°
13.49
[0.531]
ø277.0
[10.91]
124.95
[4.919] 109.75
[4.321] 24.49
[0.964]
163.03
[6.418] 210.8
[8.30] 275.0
[10.83]
187.9
[7.40] 240.00
[9.449]
M12-1.75 110°
BTBA-12
ø300.00
[11.811]
42° M12-1.75
ø330.00
[12.99]
123.69
[4.870]
119.81
[4.717]
25.0
[0.98]
191.3
[7.53]
ø263.9
[10.39] ø327.4
[12.89]
220.5
[2.68] 300.00
[11.811]
13.49
[0.531]
4.5°