Conductix-Wampfler R Series Instruction manual

R SERIES SLIP RINGS MANUALXA-969000.9 - 01.13.23
www.conductix.us R Series Slip Rings
Installation, Operation & Maintenance
Manual

R SERIES SLIP RINGS MANUAL
2
The technical data and images which appear in this manual are for informational purposes only. NO WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE CREATED BY THE
DESCRIPTIONS AND DEPICTIONS OF THE PRODUCTS SHOWN IN THIS MANUAL. Conductix Inc. makes no warranty (and assumes
no liability) as to function of equipment or operation of systems built according to customer design or of the ability of any of its products to
interface, operate or function with any portions of customer systems not provided by Conductix Inc.
Seller agrees to repair or exchange the goods sold hereunder necessitated by reason of defective workmanship and material discovered
and reported to Seller within one year after shipment of such goods to Buyer.
Except where the nature of the defect is such that it is appropriate, in Seller’s judgment, to eect repairs on site, Seller’s obligation
hereunder to remedy defects shall be limited to repairing or replacing (at Seller’s option) FOB point of original shipment by Seller, any part
returned to Seller at the risk and cost of Buyer. Defective parts replaced by Seller shall become the property of Seller.
Seller shall only be obligated to make such repair or replacement if the goods have been used by Buyer only in service recommended
by Seller and altered only as authorized by Seller. Seller is not responsible for defects which arise from improper installation, neglect, or
improper use or from normal wear and tear.
Additionally, Seller’s obligation shall be limited by the manufacturer’s warranty (and is not further warranted by Seller) for all parts procured
from others according to published data, specifications or performance information not designed by or for Seller.
Seller further agrees to replace or at Seller’s option to provide a refund of the sales price of any goods that do not conform to applicable
specifications or which dier from that agreed to be supplied which non-conformity is discovered and forthwith reported to Seller within
thirty (30) days after shipment to the Buyer. Seller’s obligation to replace or refund the purchase price for non-conforming goods shall
arise once Buyer returns such goods FOB point of original shipment by Seller at the risk and cost of Buyer. Goods replaced by Seller shall
become the property of Seller.
There is no guarantee or warranty as to anything made or sold by Seller, or any services performed, except as to title and freedom
from encumbrances and, except as herein expressly stated and particularly, and without limiting the foregoing, there is no guarantee or
warranty, express or implied, of merchantability or of fitness for any particular purpose or against claim of infringement or the like.
Seller makes no warranty (and assumes no liability) as to function of equipment or operation of systems built to Buyer’s design or of the
ability of any goods to interface, operate or function with any portions of Buyer’s system not provided by Seller.
Seller’s liability on any claim, whether in contract, tort (including negligence), or otherwise, for any loss or damage arising out of,
connected with, or resulting from the manufacture, sale, delivery, resale, repair, replacement or use of any products or services shall in
no case exceed the price paid for the product or services or any part thereof which give rise to the claim. In no event shall Seller be liable
for consequential, special, incidental or other damages, nor shall Seller be liable in respect of personal injury or damage to property not
the subject matter hereof unless attributable to gross misconduct of Seller, which shall mean an act or omission by Seller demonstrating
reckless disregard of the foreseeable consequences thereof.
Seller is not responsible for incorrect choice of models or where products are used in excess of their rated and recommended capacities
and design functions or under abnormal conditions. Seller assumes no liability for loss of time, damage or injuries to property or persons
resulting from the use of Seller’s products. Buyer shall hold Seller harmless from all liability, claims, suits and expenses in connection
with loss or damage resulting from operation of products or utilization of services, respectively, of Seller and shall defend any suit or action
which might arise there from in Buyer’s name - provided that Seller shall have the right to elect to defend any such suit or action for the
account of Buyer. The foregoing shall be the exclusive remedies of the Buyer and all persons and entitles claiming through the Buyer.
CONDUCTIX INCORPORATED

R SERIES SLIP RINGS MANUAL
3
CONDUCTIX-WAMPFLER FIELD SERVICE
Need Field Service for our products? We Can Handle It!
Ask us for a quote on expert system installations,inspections, preventative maintenance, and repairs/retrofits.
As the world’s largest single source manufacturer of mobile electrification products, Conductix-Wampfler has the unique ability to oer a
degree of service not found anywhere else. Conductix-Wampfler’s team of highly qualified service technicians and engineers have years of
experience servicing our complete line of products.
We can provide:
• Annual Service contracts
• Installation
• Commissioning
• Installation supervision to ensure your installers avoid common mistakes.
• Troubleshooting to get you up and running.
• Pre-planned inspections to complement your preventive maintenance program.
Call 1-800-521-4888 for further details.

R SERIES SLIP RINGS MANUAL
4
TABLE OF CONTENTS
SECTION 1 - SAFETY 5
1.0 Safety Information Responsibility 5
1.1 Safety Messages 5
1.2 Limitation of Liability 5
1.3 Personnel Requirements-Qualifications 6
1.4 Personnel Requirements-Unauthorized Personnel 6
1.5 Personnel Requirements - Training 7
1.6 Personnel Protective Equipment 7
1.7 Electrical Warnings 7
1.8 Operational Warnings 7
1.9 Maintenance Warnings 8
1.10 Specifications and Listings 8
1.11 Temperature and Ampere/Voltage Ratings 8
1.12 Markings 8
SECTION 2 - PRODUCT DISPOSAL 9
2.0 Product Disposal & Recycling 9
SECTION 3 - INSTALLATION 10-14
3.0 Application Types 10
3.1 Mounting 10
3.1.1 General instructions for all Assemblies 10
3.1.2 Unenclosed slip ring assemblies and slip ring assemblies with wrap around covers 11
3.1.3 Slip Ring in Revolving Covers (RU) 12
3.1.4 Slip Ring in Swivel Enclosure (SU) (RAQ/RBQ) 12
3.1.5 Explosion Proof Enclosures (XRU, XSU, and XSU with Optional Air Pass) 13
3.2 Wiring and Connections 14
SECTION 4 - MAINTENANCE 15-18
4.0 Lubrication 15
4.1 Inspections 15
4.2 Brush Holders 15
4.3 Brushes 15-16
4.4 Brush Fit Inspection 17
4.5 Brush Springs 17
4.6 Rings 18
4.7 Electrical Connections 18
4.8 Brush Rigging 18
4.9 Enclosure Inspection 18
4.10 Cleaning 18
SECTION 5 - STORAGE 19
SECTION 6 - SERIAL NUMBER RECORD 19
SECTION 7 - TROUBLESHOOTING 19
SECTION 8 - REPLACEMENT PARTS 20-24
NOTES 25

R SERIES SLIP RINGS MANUAL
5
SECTION 1 - SAFETY
1.0 Safety Information Responsibility
1.0.1 All owner, operator, and maintenance personnel must read and understand all manuals associated with this product before
installation, operation, or maintenance.
1.0.2 The manual provides information on the recommended installation, operation, and maintenance of this product. Failure to read and
follow the information provided could cause harm to yourself or others and/or cause product damage. No one should install, operate,
or attempt maintenance of this product prior to familiarizing themselves with the information in this manual.
1.1 Safety Messages
The following safety messages are used in this manual to alert you to specific and important safety related information.
CAUTION
CAUTION indicates unsafe actions or situations that have the potential to cause injury, and/or minor equipment or property damage.
DANGER
DANGER indicates hazards that have the potential to cause severe personal injury or death.
WARNING
WARNING indicates unsafe actions or situations that have the potential to cause severe injury, death, and/or major equipment or property
damage.
NOTE
NOTE is used to alert you to installation, operation, programming, or maintenance information that is important, but not hazard related.
1.2 Limitation of Liability
1.2.1 All data and information in this mounting instructions have been compiled in compliance with the applicable standards and
regulations, best practice and our many years of experience and knowledge.
1.2.2 The manufacturer accepts no liability for damages resulting from:
• Failure to comply with this document
• Improper use
• Use by untrained personnel
• Unauthorized modifications
• Technical changes
• Use of unauthorized replacement parts and accessories
• The actual scope of delivery may dier from the explanations and descriptions provided here if the model in question is a special
one, if additional equipped has been ordered or due to recent technical changes.
1.2.3 The obligations agreed upon in the delivery agreement and our General Terms and Conditions of business apply, as do the delivery
conditions of the manufacturer and the legal regulations applicable at the time the contract was concluded.
1.2.4 All products are subject to technical modifications in the context of improvement of function and further development.

R SERIES SLIP RINGS MANUAL
6
SECTION 1 - SAFETY
1.3. Personnel Requirements-Qualifications
WARNING
Inadequately trained persons are at risk of injury!
Improper use can result in serious personal injury or material damage. All activities must only be performed by qualified personnel.
1.3.1 Only persons who can be expected to perform their work reliably are acceptable personnel. People whose reactions are impaired by
drugs, alcohol or medications, for example, are not authorized.
1.3.2 When selecting personnel, follow all age- and occupation-specific guidelines applicable at the location of use.
1.3.3 The following qualifications are specified in the operating instructions for certain fields of activity.
1.3.4 Trained personnel and operators
• Will have participated in a training session, given by the owner, on the tasks assigned to them and the potential hazards in case
of improper conduct.
• The owner of the machine or system must document that the appropriate training has taken place.
1.3.5 Specialist personnel
• Will consist of persons capable of performing assigned tasks and independently identifying and avoiding potential hazards based
on their specialist training, knowledge and experience as well as their knowledge of the applicable regulations. Persons are
deemed to be technically qualified if they have successfully completed training as a master electrician, apprentice electrician,
electrical engineer or electrical technician. Persons are also considered technically qualified if they have been employed in an
appropriate capacity for several years, receiving theoretical and practical training in that line, and their knowledge and skills have
been tested by a specialist in the appropriate field of training.
• The machine or system owner must document that the appropriate certificates or other proofs of qualification have been or are
being provided.
1.4 Personnel Requirements-Unauthorized Personnel
WARNING
Danger due to unauthorized personnel!
Unauthorized persons who do not meet the requirements described here are not acquainted with the dangers in the working area. Keep
unauthorized personnel away from the working area. In case of doubt, address the person and direct them away from the working area.
Stop working, as long as unauthorized persons are in the working area.

R SERIES SLIP RINGS MANUAL
7
SECTION 1 - SAFETY
1.5 Personnel Requirements-Training
1.5.1 Before commissioning the equipment, personnel must be trained by the owner. Log the implementation of training for better
traceability.
Example of a training log:
Date Name Training Type Training Instructor Signature
11/5/2019 John Doe First safety training for personnel Dave Miller
Table: 1-1
1.6 Personal Protective Equipment
1.6.1 For every task, always use:
Safety helmet: For protection against falling or flying parts and materials.
Protective gloves: For the protection of hands against friction, scrapes, puncture or deeper wounds, as well as against contact with hot
surfaces.
Protective work clothing: Primarily for protection against entrapment by moving machine parts. Work clothing must be close fitting with
a low resistance to tearing; it must have close-fitting sleeves and no protruding parts.
Protective footwear: For protection against heavy failing parts and slipping on slippery floors.
For special tasks, specific protective equipment is required when executing particular tasks:
Safety eye wear: For eye protection against harmful influences such as strong light, chemicals, dust, splinters or weather eects.
Hearing protection: For protection against loud noises and to prevent acoustic trauma.
Breathing mask (FFP-3 - according to country-specific requirements): For protection against materials, particles, and organisms. In
this case, for protection against the dust produced by the abrasion of carbon brushes and the PVC insulation of the conductor rail.
1.7 Electrical Warnings
1.7.1 Install and ground the slip ring and the entire unit in accordance with the National Electric Code (NEC) and local codes and/or
ordinances.
DANGER
• Be aware of hazard of electrical shock or burn. Always disconnect the power from the collector ring before attempting
any service function. Follow lock out/tag-out procedures as outlined in OSHA section 1910.147 where appropriate. Do
not use this slip ring with electrical loads greater than the rated current and voltage.
1.8 Operational Warnings
1.8.1 Slip rings must be enclosed and protected from any contact by personnel. Means for the provision of this protection is the
responsibility of the user. Various enclosure styles are available from Conductix-Wampfler.
WARNING
• Modification of this equipment may cause excessive wear or failure and will void the warranty. Additionally,
modifications may cause safety and fire hazards. Contract the manufacturer regarding any modifications which could
aect safety and reliability.

R SERIES SLIP RINGS MANUAL
8
SECTION 1 - SAFETY
1.9 Maintenance Warnings
• Exercise care while servicing, adjusting and operating the slip ring.
• Periodically check all fasteners and hardware to ensure tightness.
• Install all mounting fasteners and hardware to ensure tightness under vibration.
• For further questions regarding the use/installation of the R-Series slip ring that are not answered in the manual, please contact
us at:
US: 800-521-4888
Canada: 800-667-2487
1.10 Specifications and Listings
1.10.1 The R-Series slip ring are built to manufacturer’s interpretation of NEC guidelines and UL specifications. They are not generally
certified or listed by an independent certifying or regulatory body.
1.10.2 The following specifications apply to all R-Series slip rings (contact Conductix-Wampfler for in-between sizes).
Bore Size (in.) RPM without Ball Bearings RPM with Ball Bearings
1.5 125 500
2.5 75 225
4.0 32 125
8.0 25 100
Table:1-2
NOTE:
• Standard RPM ratings may not apply in all circumstances. Consult factory for special conditions including bore sizes
not listed, very large amperage ratings, number of rings, or extreme environments.
1.10.3 The R-Series slip rings are intended for industrial use and require a permanent mounting means.
1.11 Temperature and Ampere/Voltage Ratings
1.11.1 The R-Series slip ring is rated to withstand a maximum ambient temperature of 220°F (104°C). Connections to the assembly
must be sized to the ratings of the circuit (refer to NEC tables 310.15(B)(16), 310.15(B)(17), 310.15(B)(18), 310.15(B)(19), and
applicable notes).
1.12 Markings
1.12.1 Every slip ring is marked with a label on the outboard bearing (or enclosure) which includes the Conductix name/logo, product
catalog number, and the individual product serial number.
1.12.2 The marking on slip rings include the maximum amperage and voltage, but some circuits may be lower than this maximum and or
de-rated as per each wire and or cable gauge sizes and types and or number of circuits.

R SERIES SLIP RINGS MANUAL
9
SECTION 2 - PRODUCT DISPOSAL
2.0 Product Disposal and Recycling
2.0.1 Once the product has reached it’s end of life it must be disassembled and disposed of in accordance with local and regional
environmental requirements.
2.0.2 In the absence of a return and disposal agreement, disassembled components must be recycled as follows:
• All metallic parts must be sorted and recycled by material type
• All plastic components must be sorted and recycled by material type
• All other components are to be disposed of in accordance with their material composition. Take care with items identified as
Substances of Concern.
2.0.3 Local authorities or special disposal companies can provide information about environmentally appropriate disposal.

R SERIES SLIP RINGS MANUAL
10
SECTION 3 - INSTALLATION
WARNING
• Never support and/or carry unit by core and/or brush leads. Carry/Lift the Slip Ring Unit by supporting outboard
bearings, shaft, flange, or enclosure as applicable. Some units may have specific lifting tabs on the enclosure.
3.0 Application Types
3.0.1 Slip ring assemblies can be purchased with or without an enclosure. Such enclosures are:
• Wrap around brush carriage cover (RAU, RBU)
• Shaft/Flange stationary (Revolving/RU)
• Enclosure stationary (Swivel/SU)
• Explosion Proof revolving enclosure (XRU)
• Explosion Proof swivel with rotating junction box (XSU)
NOTE:
• User must enclose the slip ring assembly appropriately to meet safety codes and to protect the assembly.
3.1 Mounting
3.1.1 General Instructions for all Assemblies
3.1.1.1 Slip ring assemblies are to be mounted on the center axis of the application.
3.1.1.2 Unenclosed slip ring assemblies are made up of two basic components, the brush carriage and the core. The brush carriage is
made up of the brush posts, brushes, brush holders, and outboard bearings. The core is made up of the rings, insulators, drive
collar, ball or friction type bearings, and leads extending from the end of the outside of the through bore. See Figure 3-1
3.1.1.3 The slip ring assembly is through bore design and is to be mounted onto a shaft by the set screws in the drive collar.
3.1.1.4 The slip ring assembly can be operated with either the brush carriage of the slip ring core rotating and the other stationary. One of
these elements must be stationary in relationship to the other for proper operation. This is called “driving” the ring.
NOTE:
• The term “driving” is referring to holding stationary or rotating either the brush carriage or the core.
3.1.1.5 The brush carriage on a standard slip ring assembly has drive holes in the outboard bearings. See Figure 3-2
3.1.1.6 Unenclosed slip ring assemblies and assemblies with wrap around cover(s) can be installed with either the brush carriage or core
rotating. One of these items must be held stationary in relationship to the other for proper operation.
3.1.1.7 On enclosed slip ring assemblies, the brush carriage is driven by enclosure and the core is driven by the shaft. One of these items
is to be held stationary in relationship to the other for proper operation.
3.1.1.8 Due to some types of applications and/or the size of the slip ring assembly, the brush carriage may be required to be driven
from both ends. Driving the brush carriage from both ends will prevent the carriage from racking or twisting. Special slip ring
assemblies may have a special drive arm type device(s) for driving the brush carriage.
3.1.1.9 When driving and to avoid putting strain on the slip ring assembly, the brush carriage or core MUST be driven by a “loose link” or
“floating” type drive connection or mechanism. Meaning that there is to be “play” between one of the slip ring driven items, which
is either the brush carriage or core, and the device that it is driving it.
NOTE:
• The “loose link” or “floating” type drive connection or mechanism is required due to run-out and or deflection that may occur
during operation.
• If not followed, premature wear or failure of slip ring assembly will occur. (See 8.0 REPLACEMENT PARTS for optional bolt on
drive brackets).

R SERIES SLIP RINGS MANUAL
11
SECTION 3 - INSTALLATION
3.1.2 Unenclosed slip ring assemblies and slip ring assemblies with wrap around covers (RAU/RBU)
3.1.2.1 Install slip ring assembly on the shaft and lock into place with set screws provided in the drive collar. The mounting shaft must
extend at least 80% of the length of the slip ring assembly core. It is recommended to dog point the shaft for the drive collar set
screws when mounting the assembly onto the shaft to prevent the core from coming loose. This is recommended for 2.5” Bore
or larger, or applications where extreme speed/torque/vibration are present. Do this by positioning the slip ring on the shaft and
marking the set screw holes. Then use a drill bit close to the same size as the set screw to dimple the shaft and prevent screw
slippage. On slip ring assemblies with a 2.5 inch through bore or larger, a key-way slot in the drive collar is also provided to
reduce chance of the drive collar slipping on the shaft. Always use thread locking compound.
3.1.2.2 When driving the slip ring assembly, locate the torque arm, bar, pin, bolt, or suitable member to loosely capture the drive holes
in the outboard bearings or drive slot along the outside of the brush carriage. To avoid putting strain on the assembly, the drive
connection must be a “looselink” or “floating” type drive connection. Because of the run-out and/or deflection that may occur
during operation, there is to be “play” between the slip ring driven item and the device that is driving it.
3.1.2.3 Make electrical connections at lugs on the brush holders and at the ends of core lead wires, buss bars, or at the core lead
terminal shaft. Core leads may be cut to desired length at time of installation. If equipped with wrap around cover, route brush
leads through the side of the assembly (NPT hub if provided) and connect brush holders or terminal strips. Be sure electrical
connections to the brush holders do not interfere or exert tension on the brush holders and/or carriage assembly. We recommend
using flexible wire for brush and core lead terminations. All wire sizes and types must be appropriate to the required amperage
and voltage (refer to NEC tables 310.15(B)(16), 310.15(B)(17), 310.15(B)(18), 310.15(B)(19) and applicable notes).
WARNING
• During installation of the slip ring, proper air gap must be maintained between conductive items, and all terminal
connections. Refer to U.L. 508C standards.
Brush
Outboard Bearing
Insulator
Brush Carriage
User Shaft
(not shown)
0.53” Drive Holes
on (standard)
Set Screw
Brush Holder
Bore B.C.
1-1/2” 4-1/2”
2-1/2” 8-1/4”
4” 12-3/8”
8” 16”
Consult factory for special or
other bore sizes.
Figure 3-1
Brush
Drive Holes
Core lead terminal block
and terminal strip
Drive Link or Pin
(supplied by others)
Minimum Clearance .030”
Figure 3-2

R SERIES SLIP RINGS MANUAL
12
SECTION 3 - INSTALLATION
3.1.3 Slip Ring in Revolving Enclosure (RU)
3.1.3.1 Mount the assembly by either the shaft flange or internal threads at end of shaft to rotating or stationary point. Can be mounted
with either the enclosure or shaft/flange rotating.
3.1.3.2 Slip ring is accessed by removal of enclosure cover.
3.1.3.3 Electrical leads to brush carriage of slip ring come through the side of enclosure (NPT hub if provided) and connect to screw or
bolt connectors on brush holders or terminal strips. Electrical lead connections to the core, come through the middle of the shaft
and connect to core leads of the Slip Ring. See Figure: 3-3
3.1.4 Slip Ring in Swivel Enclosure (SU) (RAQ/RBQ)
3.1.4.1 Mount the enclosure using the mounting straps or mounting flange provided. The assembly can be operated with either the
enclosure or swivel rotating.
3.1.4.2 Slip ring is accessed by removal of enclosure cover.
3.1.4.3 Connect core electrical leads through the swivel elbow provided. Swivel elbow is either held stationary or rotated with a suitable
link mechanism such as mechanical or conduit connection.
3.1.4.4 Electrical leads to brush carriage of slip ring come through the side of the enclosure (NPT hub if provided) and connect to brush
holders and/or terminal strips. See Figure: 3-3
Figure 3-3
NOTE:
• Enclosure to be driven, held stationary or rotating, by means of suitable loose link or floating type connection such as a
mechanical driven arm or the conduit connection. This is to avoid putting strain on the assembly due to the run-out and or
deflection that may occur during operation. This is to be “play” between the slip ring driven item and the device that is driving it.
(See Section 8.0 REPLACEMENT PARTS for optional bolt on drive brackets).
Enclosure
Cover
Entrance
Ring
Mounting Holes
1.0” NPT
(Hollow shaft
for core leads)
Shaft Flange
Four 7/16” holes
Mounting
Feet
HUB
(for brush leads)
Swivel Elbow
(for core leads)
RU Enclosure SU ENCLOSURE

R SERIES SLIP RINGS MANUAL
13
SECTION 3 - INSTALLATION
3.1.5 Explosion Proof Enclosures (XRU, XSU, and XSU with optional air pass) Figure: 3-4
3.1.5.1 For all explosion proof enclosures, user must seal incoming and outgoing electrical conduit according to National Electric Code.
For XSU models there is a cavity behind the conduit fitting(s) for sealant for the brush leads and the core leads in the enclosure
housing and core lead junction box. For XRU models there is a cavity behind the conduit fitting(s) in the entrance ring for the brush
leads and threads at the top of the shaft inside the enclosure for the core leads for sealant.
3.1.5.2 Slip Ring is accessed by removal of enclosure cover, side panels, or bolted cover.
XRU = Screwed on cover, loosen the set screw and use a strap wrench to turn the cover counterclockwise. XSU= bolted on side
panels and should be torqued to 14 ft-lbs.
3.1.5.3 For XRU explosion proof assembly mounting and wiring instructions, refer to section 3.1.3.3 slip ring in RU style Revolving
Enclosure.
3.1.5.4 For XSU explosion proof assembly mounting and wiring instructions, refer to sections 3.1.4.3 and 3.1.4.4 slip ring SU style Swivel
Enclosure.
Figure 3-4
NOTE:
• Enclosure to be driven, held stationary or rotating, by means of a suitable loose link or floating type of connection such as
a mechanical drive arm or the conduit connection. This is to avoid putting strain on the assembly due to the run-out and or
deflection that may occur during operation. This is to be “play” between the slip ring and the device that is driving it.
Fittings for
Brush Leads
Enclosure Cover
Entrance Ring
Mounting Holes
(4 places, 8-15/16” x 8-3/4” Bolt Pattern)
Fittings for
Brush Leads
Conduit Fitting
for Core Leads Air Pass
(Optional)
Access
Panels
Panel
Screws at
14 ft-lb.
Enclosure
XRU
XSU

R SERIES SLIP RINGS MANUAL
14
SECTION 3 - INSTALLATION
3.2 Wiring and Connections
3.2.1 Perform all wiring according to National Electrical Code guidelines and any applicable codes. (Refer to NEC tables: 310.15(B)(16),
310.15(B)(17), 310.15(B)(18), 310.15(B)(19).
3.2.2 We recommend using flexible stranded wire for brush and core lead terminations. All wire sizes and types must be appropriate to the
required amperage and voltage. (See 3.2.1 for NEC Tables)
3.2.3 When making electrical connections at lugs on the brush holders and at the ends of core lead wires, busbars or terminal block
should be used. Core leads may be cut to desired length at time of installation. Be sure electrical connections to the brush holders
do not interfere or exert tension on the brush holders and/or the carriage assembly.
3.2.4 Connectors in the optional core lead terminal blocks require 5/16” of stripped insulation.
3.2.5 The optional core lead terminal block provides connections to the rings. Use the appropriate crimp connectors if the terminal block is
not supplied.
3.2.6 Screws used in the electrical connections must be tightened to achieve the designated electrical rating.
3.2.7 Brush lead connections are numbered to correspond to core lead connections. The lock washer used on brush lead terminals
should NOT be placed between the brush shunt(s) and the brush lead. It may be placed above or below the group as needed.
See Figure: 3-5
3.2.8 For wiring the optional heater with thermostat: from the power source, connect one lead to the power and the other lead to the
neutral or negative. If 3 phase power is used, the heater wire will be hooked up to only one phase and neutral/ground. Make sure
the power source matches the voltage rating on the thermostat.
NOTE:
• If the thermostat is supplied separate from the heater, the thermostat is to be wired in series with the power lead.
WARNING
• During installation of the slip ring, proper air gap must be maintained between conductive items, and all terminal
connections. Refer to U.L. 508C standards.
Figure 3-5

R SERIES SLIP RINGS MANUAL
15
SECTION 4 - MAINTENANCE
4.0 Lubrication
4.0.1 All bearings are lubricated for life at the factory. Additional lubrication should not be required.
CAUTION
• Do not apply any lubrication or solvent cleaning agents to any part of the slip ring. Use only dry air to clean slip ring
assembly.
4.1 Inspections
CAUTION
• Before performing inspections and maintenance procedures, ensure all power is disconnected and all safety procedures (lock-
out / tag-out) are followed.
4.1.2 Make the first inspection shortly after installation and/or operation to ensure all electrical connections are tight and all mechanical
items are properly adjusted. Make continuing preventative inspections on a regular basis after every 200-400 hours of operation
under normal conditions. The need for periodic preventative maintenance inspections can be tailored and/or varied depending on
the application requirements.
4.2 Brush Holders
4.2.1 Inspect brush holders for proper alignment. Locate brush holders so that the entire brush contact surface rides squarely on the
ring with the brush moving freely in the brush holder. Position brush holders so the brush makes contact with the middle of the
conductor and is not oset. See Figure: 4-3
4.2.2 Check brush holder clamps for tightness. Set clamp bolt at 10 in-lb. max.
4.2.3. Inspect brush terminations at the holder to assure that no external force is imposed on the holder. We recommend flexible or soft
wire leads for these terminations. Use external clamps to support the entire weight of the leads.
4.3 Brushes
4.3.1 Inspect for wear.
a. Style with the spring on the top of the brush See Figure: 4-1: If the distance from the top of the insulator to the lower part of the
brush spring is 093” or less, replace the brush.
b. On the metal type DF holder assembly with dual brushes See Figure 4-2: If the wide portion of the brush is worn to 050” or less,
replace the brush holder assembly.
4.3.2 Inspect brush contact surface by removing the brush if required. Remove surface dirt, oxidation, pitting, or other contaminants by
using a brass or poly brush or 320 grit sand paper. Slip ring cleaning kit available (see 8.0 REPLACEMENT PARTS, for optional slip
ring cleaning kit). Care is to be taken not to load-up the brush surface with dust or contaminants.
4.3.3 To remove and replace brush on square post mounting brush holder See Figure: 4-1:
1. Remove the brush shunt lead and brush lead wiring from top of brush holder by removing top terminal screw.
2. Lift spring slightly with a hook type tool.
3. Tilt brush out from under the spring and away from holder for removal.
4. To reassemble, replace the brush in the reverse fashion.

R SERIES SLIP RINGS MANUAL
16
4.3.4 To remove and replace brush holder assembly on square post See Figure: 4-1:
1. Remove brush per Section 4.3.3.
2. Remove allen screw located on side of holder between top terminal screw and spring.
3. Remove holder assembly from post.
4. To reassemble, replace the assembly in the reverse fashion. Set clamp bolt at 10 in-lb. max.
SECTION 4 - MAINTENANCE
Brush
Spring
Allen Screw Brush Post
4.3.5 To remove and replace metal type DF style brush holder assembly on fiberglass brush post See Figure: 4-2:
1. Remove the brush shunt leads and brush lead wiring from top of brush holder by removing cable connection bolts and or lugs.
2. Remove top brush holder clamp.
3. Slide the remaining brush assembly frame out from under the brush post.
4. To reassemble, replace assembly in the reverse fashion. Torque clamp bolts to 96 in lbs.
Clamp
Brush Post
Shunt Leads
200 Amp Brush
Frame
Spring
Figure: 4-1
Figure: 4-2

R SERIES SLIP RINGS MANUAL
17
SECTION 4 - MAINTENANCE
4.4 Brush Fit Inspection
4.4.1 The brush spring cross-bar must be seated in the brush slot. See Figure: 4-3
NOTE:
• Brushes must run at 90° ± 3° square on the rings. If the brush is not square, adjust position of brush holder on brush post.
• Brushes do not need to run on the center of the rings, but there should be no forceful friction against the insulators.
Figure: 4-3
4.5 Brush Springs
4.5.1 Inspect and test brush springs to assure uniform brush pressure. If brush springs fall below the recommended pressure, replace
entire brush holder.
Figure: 4-4
NOTE:
• If bush posts are mounted separate from slip ring assembly, follow manufacturer’s recommendation on mounting distance from
rings.
90˚
±3˚
Brush
Ring SurfaceInsulator
Cross-bar Seated
in Brush Slot
Brush Holder
5 lb. Scale
Brush Spring
Brush Spring
15 1.0 lb. minimum
35 1.5 lbs. minimum
70 3.0 lbs. minimum
200 2.5 lbs. minimum

R SERIES SLIP RINGS MANUAL
18
SECTION 4 - MAINTENANCE
4.6 Rings
4.6.1 Inspect the ring surface for dirt, oxidation, or other contaminant’s. A properly operating ring will have a film that appears burnished
in color with a darker surrounding color where the brushes track. If the ring requires cleaning, order Slip Ring Polishing Kit
Part No. XA-41286. Refer to Section 4.10 Cleaning
4.7 Electrical Connections
4.7.1 Inspect all electrical connections for corrosion and tightness. Loose and/or corroded terminations will cause a concentration of
excessive heat.
4.8 Brush Rigging
4.8.1 Brush posts are supported between two outboard bearings. The brush posts extend to the outboard bearings and are secured by a
notch in the outboard bearing. The notch prevents rotation of the brush post.
4.8.2 Spacing between the outboard bearings is critical to ensure the free rotation of the brush carriage rigging. The brush posts are cut
to an exact length in order to provide the proper spacing.
a. For 1.5” bore slip rings, locate the outboard bearings against the insulator and have a 0.20” clearance without deformation of the
material.
b. For 2.5” bore and larger without ball bearings, end play tolerance between the core insulators and both sides of the Out Board
Bearing must NOT be less than .030” and no more than .090”.
CAUTION
• End play should be checked in every slip ring assembly with the appropriate feeler gauge, dependent on the bore size
of the ring. Failure to do so can result in damage to the Out Board Bearings (OBB) or brush posts.
• Do not overtighten the outboard brush post nuts. Torque 0.75” brush posts to 25-30 in-lbs. Make a final check to
ensure there is no binding of the outboard brush rigging or binding of the brushes with insulator barriers.
4.9 Enclosure Inspection
4.9.1 Moisture is the major cause of slip ring deterioration. Water will corrode parts and breakdown insulation. Dust and dirt present within
the enclosure will aect the proper operation of the assembly. Most dusts cause excessive brush and slip ring wear, and conductive
dust, if allowed to accumulate will form a path for short circuiting.
4.9.2 A properly designed NEMA 4 enclosure will be dust tight and watertight. However, NEMA 4 enclosures do not eliminate internal
condensation. Condensation can be eliminated with the addition of a breather, drain and a thermostatically controlled heater. Consult
factory for details.
4.9.3 Periodically perform an inspection by removing the enclosure and checking for condensation, water and dust collection. If
contaminant’s are found, wipe the enclosure and the assembly with a lint free cloth. If the problem persists, take steps to remedy
the leakage or condensation problem.
4.10 Cleaning
4.10.1 In addition to using the slip ring polishing kit No. XA-41286 clean the slip ring using only clean, dry, low pressure air or a vacuum
cleaner to remove the contaminants from the rings. Do not use any solvents, aerosol sprays, or liquid cleaners on the slip ring
assembly.

R SERIES SLIP RINGS MANUAL
19
SECTION 5 - STORAGE
5.0 When storing the slip ring, keep it at room temperature in a clean, dry, protective place. Place self-contained or bagged absorbent
material (desiccant) in the collector ring enclosure during extended periods of storage. Remove absorbent material before putting
collector ring into operation.
SECTION 6 - SERIAL NUMBER RECORD
6.0 Make the following information available when ordering replacement parts or discussing the slip ring with the factory by recording the
information in the spaces provided here. This information is located on your packing slip, factory invoice, and serial number tag.
Catalog Number of Slip Ring:
Serial Number:
Date of Purchase:
SECTION 7 - TROUBLESHOOTING
7.0 Some possible problems are addressed in the table here, otherwise, contact the factory at the numbers provided on the back page.
Problem What to Check
Intermittent Signal or Loss of Signal.
Verify brush wear per Section 4.3.1
Check spring pressure per Section 4.5
Check contact surfaces for cleanness.
(Ring Polishing Kit No. XA-41286)
Visually check for spring fit and function. Adjust or replace as necessary.
consider silver graphite brushes and/or silver plated rings for sensitive
data signals and very low amp/volt signals.

R SERIES SLIP RINGS MANUAL
20
SECTION 8 - REPLACEMENT PARTS
NOTE:
• DRIVE ARM BRACKET FOR LOOSE LINK OR FLOATING TYPE DRIVE CONNECTION RU/SU STYLE ENCLOSURE. Consult factory for
pricing (part number and/or serial number required for verification of fit).
Figure 8-1
Figure 8-2 Spare Parts overview (1.5” Bore Ring show, other bore size parts may dier slightly. Contact factory for questions).
NOTE:
• Always have Part and or Serial Number when ordering
Flange Enclosure
No. of Studs O.D. Inches Part No. Bore Size
8 10.25 XA-531705 1.5”
8 17.0 XA-531449 2.5”
8 20.0 XA-531114 2.5”, 3.0”
6 17 XA-532201 2.5”, 3.0”