How to Use this Manual
The following instructions and recommendations apply to
standard Falk 1055, 1065, & 1085 NRTH Style B backstops.
Their performance and life depend largely upon how they are
installed and serviced. Drawings are representative of this
series of backstops.
When requesting information specify the M.O. number,
backstop size, model number, maximum running rpm, torque
rating, and date indicated on the backstop nameplate.
This manual provides detailed instructions on installation,
maintenance, and parts identification. Use the following Table
of Contents to located required information.
Table of Contents
General Information . . . . . . . . . . . . . . . . . . . . . . . . . Page 1
Description and Operation . . . . . . . . . . . . . . . . . . . . Page 1
Safety Codes and General Precautions. . . . . . . . . . . . Page 1
Application Requirements . . . . . . . . . . . . . . . . . . . . Page 1-2
General Instructions . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
Long Term Storage . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3-4
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
CAREFULLY FOLLOW THE INSTRUCTIONS IN THIS
MANUAL FOR OPTIMUM PERFORMANCE AND TROUBLE
FREE SERVICE.
Introduction
Rexnord True Hold backstops are precision built safety devices
designed to protect inclined conveyors or vertical elevators
from the dangers of gravity accelerated reverse runaway. To be
assured of reliable protection and the longest possible service
life, it is important that the following recommendations be
observed for the installation, lubrication, and maintenance of
Rexnord backstops.
As soon as the backstop has been received, examine it
carefully for damage that may have occurred in transit and
report any breakage to the transit company and Rexnord
immediately. All tags and bulletins attached to the backstop
should be carefully read before placing the backstop in
operation and then filed for future reference.
The various component parts referred to may be readily
identified from Figure 1 on Page 2.
ALL BACKSTOPS ARE SHIPPED WITH OIL —
Although all
backstops are shipped from the factory with oil, it is important
to check lubrication levels prior to operation.
If the backstop is to be stored for an extended period of time
(over 3 months) before installation, see the Long Term Storage
section on Page 3 for instructions.
Warranty
— Rexnord Industries, LLC (the ”Company”)
warrants that Drive One gear drives (I) conform to Company’s
published specifications, and (II) are free from defects of
material for three years from the date of shipment.
Company does not warrant any non-Company branded
products or components (manufacturer’s warranty applies) or
any defects in , damage to, or failure of products caused by:
(I) dynamic vibrations imposed by the drive system in which
such products are installed unless the nature of such vibrations
has been defined and accepted in writing by Company as a
condition of operation; (II) failure to provide suitable
installation environment; (III) use for purposes other than those
for which designed, or other abuse or misuse; (IV)
unauthorized attachments, modifications or disassembly, or (V)
mishandling during shipping.
Safety Codes & General Precautions
Warning:
Consult applicable local and national safety codes
for proper guarding of rotating members. Lock out power
source and remove all external loads from drive before
servicing drive or accessories.
DISMANTLING, REPAIR & PARTS REPLACEMENT —
See
Figure 1, Page 2. The backstop and normal associated
equipment (shaft, pulleys, etc.) involve moving parts, therefore
consult local, state, OSHA and ANSI safety codes for proper
guarding of revolving parts and possible pinch points. (A pinch
point occurs at the contact point between the backstop torque
arm and support, and between the torque arm and stirrup.)
Carefully read and follow all supplementary instructions and
tags attached to the backstop and then file for future
reference.
Operate the backstop within the torque rating and overrunning
speed, listed on the nameplate. Follow installation and
lubrication instructions in this manual.
When removing backstop from shaft, do not apply heat to the
backstop. Apply axial force to the hub (inner race) of the
backstop only.
Damage may occur to the backstop if it remains inoperative
under full load for extended periods of time.
If the shaft was accidentally rotated in the wrong direction of
rotation at start-up, the backstop may have been damaged.
Return the backstop to the Factory for inspection.
Falk NRTH Style B backstops
use a sprag design that does not
allow motion in one direction and runs freely in the other
direction.
Application Requirements
BACKSTOP APPLICATION —
The 1055
, 1065, & 1085
NRTH Style B backstops
are designed to prevent reverse
rotation in applications such as inclined conveyors, bucket
elevators, fans, rotary pumps and kilns. If local safety codes
permit, the backstop may be used as a backup or a brake on
these applications, but NOT in people conveying systems such
as elevators, manlifts, ski tows or ski lifts. Also DO NOT use
the backstop as a substitute for a brake
.
OPERATING TEMPERATURES —
Enclosure of the backstop
may cause overheating. Provide adequate ventilation.
Backstop operating temperatures, at maximum overrunning
speed, may exceed 90°F (50°C) above ambient. Determine
the effect of this temperature on the driven equipment and
provide cooling if necessary.
If a backstop operates in the sun at ambient temperatures over
100°F (38°C), then special measures should be taken to
protect the backstop from solar energy. This protection can
consist of a canopy over the backstop or reflective paint on
Rexnord Industries, LLC, Geared Products, P.O. Box 492, Zip 53201-0492
568-102
3001 W. Canal St., Zip 53208-4200, Milwaukee, WI USA Telephone: 414-342-3131
July 2006
Fax: 414-937-4359 e-mail: [email protected] web: www.rexnord.com
Supersedes 2-05
Falk™ Horizontal Shaft Backstops
•
Installation & Maintenance
Type NRTH Style B
•
Sizes 1055, 1065, & 1085
(Page 1 of 4)
