DX Engineering DXE-BBGK-3-55-P Instructions manual

Thrust Bearing Bypass Ground Kit

Part Number

Description

DXE-BBGK-2-25-P

Bearing Bypass Ground Kit for 2” Mast for Rohn 25G/45G

DXE-BBGK-2-55-P

Bearing Bypass Ground Kit for 2” Mast for Rohn 55G

DXE-BBGK-3-25-P

Bearing Bypass Ground Kit for 3” Mast for Rohn 25G/45G

DXE-BBGK-3-55-P

Bearing Bypass Ground Kit for 3” Mast for Rohn 55G

DXE-BBGK-SERIES-INS Rev. 0b

The DX Engineering Thrust Bearing Bypass Ground Kits are used as an added lightning protection scheme allowing
energy an easy path from the tower mast to a leg on the tower. This alternate path helps to avoid energy that would
normally flow through the thrust bearing which could freeze up or otherwise ruin the bearing. The kits are available
for two inch and three inch diameter mast sizes and the round tower legs found on Rohn 25G, 45G and 55G tower
sections. The Flexible Bypass Cable is 10 feet long and made of 1 AWG (780 strands of 0.010”) copper wire with a
flexible UV resistant EPR insulation. The ends of the Flexible Bypass Cable are terminated with ring terminals (1/4”
at one end, 3/8” at the other end) and sealed.

There are four Bearing Bypass Ground Kits available:

Each kit contains: One Flexible Bypass Cable, one DX Engineering Super Duty Clamp, one DX Engineering Heavy
Duty Clamp, Backing Plates and hardware for mounting the clamps and the flexible bypass cable. Parts needed but
not supplied are: JTL-12555 Jet-Lube™ SS-30 Anti-Seize and TES-06132 Scotch 33 Electrical Tape.

Installation is straight forward and is shown in the drawings below. Use the Jet-Lube SS-30 on all of the hardware
and on the mating surfaces of the clamps where they contact the mast and
tower leg. Install the two clamps - the larger one on the mast and the
smaller one on a tower leg as shown. Install the Flexible cable on the
clamps as shown below. Once installed on the clamps, the
Flexible Bypass Cable is positioned and held to the
antenna boom with tape. The Flexible Bypass
Cable is taped with the antenna feedline and
forms a large loop to allow full rotation of the
antenna without hanging
up the cable.

Examining the Flexible Bypass Cable should be part of your annual tower inspection and it should be replaced if the
cable shows signs of wear or cracking insulation or other signs of damage.

Optional Accessory Items

JTL-12555 Jet-Lube™ SS-30 Pure Copper Anti-Seize 12555

Jet-Lube™ SS-30 Pure Copper Anti-Seize is the top choice of engineers and technicians in government, industry and leading Amateur Radio
contest stations, for protecting mechanical assemblies of aluminum tubing, general hardware and copper grounding systems.
On bonded metal surfaces Jet-Lube™ SS-30 assures electrical and RF conductivity while preventing oxidation and corrosion.
Surpassing the capabilities of other aluminum anti-oxidants, the wide temperature range of Jet-Lube™ SS-30 prevents long­term drying and caking, and allows easy disassembly and effortless cleaning of parts. An environmentally preferred thread
lubricant and conductive termination compound, Jet-Lube™ SS-30 helps keep your equipment in serviceable condition. It
contains a high concentration of copper flakes, a requirement for heavy loads or compression; controlled frictional
characteristics allow the surfaces of nuts and bolts to be tightened to their design torque specifications. This anti-seize product
assures full hydraulic efficiency by allowing the metal surfaces to slide over each other without damaging metal-to-metal
contact. Jet-Lube™ SS-30 is also designed to work as a similar and dissimilar component between two metal surfaces to
prevent seizing and galvanic action. The SS-30 compound formula improves conductivity and ground continuity - and will not
melt in high temperatures.
Jet-Lube™ SS-30 Pure Copper Anti-Seize Features include:

* Meets MIL-PRF-907E spec
* K-factor: 0.13
* Service rating: -65 degrees F (-54 degrees C) to 1800 degrees F (820 degrees C)
* SS-30 Resistivity (ohm-CM x 108) 5

TES-06132 - Scotch® Super 33+.

Highly conformable super stretchy tape for all weather applications. This tape provides flexibility and easy handling for all
around performance. It also combines PVC backing with excellent electrical insulating properties to provide primary electrical
insulation for splices up to 600V and protective jacketing.

Technical Support

If you have questions about this product, or if you experience difficulties during the installation, contact DX Engineering at
[phone]. You can also e-mail us at:

[e-mail]

Warranty

All products manufactured by DX Engineering are warranted to be free from defects in material and workmanship for a period of one (1) year from date of
shipment. DX Engineering’s sole obligation under these warranties shall be to issue credit, repair or replace any item or part thereof which is proved to be other
than as warranted; no allowance shall be made for any labor charges of Buyer for replacement of parts, adjustment or repairs, or any other work, unless such
charges are authorized in advance by DX Engineering. If DX Engineering’s products are claimed to be defective in material or workmanship, DX Engineering
shall, upon prompt notice thereof, issue shipping instructions for return to DX Engineering (transportation-charges prepaid by Buyer). Every such claim for
breach of these warranties shall be deemed to be waived by Buyer unless made in writing. The above warranties shall not extend to any products or parts thereof
which have been subjected to any misuse or neglect, damaged by accident, rendered defective by reason of improper installation, damaged from severe weather
including floods, or abnormal environmental conditions such as prolonged exposure to corrosives or power surges, or by the performance of repairs or alterations

outside of our plant, and shall not apply to any goods or parts thereof furnished by Buyer or acquired from others at Buyer’s specifications. In addition, DX
Engineering’s warranties do not extend to other equipment and parts manufactured by others except to the extent of the original manufacturer’s warranty to DX

Engineering. The obligations under the foregoing warranties are limited to the precise terms thereof. These warranties provide exclusive remedies, expressly in
lieu of all other remedies including claims for special or consequential damages. SELLER NEITHER MAKES NOR ASSUMES ANY OTHER WARRANTY
WHATSOEVER, WHETHER EXPRESS, STATUTORY, OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NO
PERSON IS AUTHORIZED TO ASSUME FOR DX ENGINEERING ANY OBLIGATION OR LIABILITY NOT STRICTLY IN ACCORDANCE WITH
THE FOREGOING.
©DX Engineering 2017
DX Engineering®, DXE®, DX Engineering, Inc.®, Hot Rodz®, Maxi-Core®, DX Engineering THUNDERBOLT®, DX Engineering Yagi Mechanical®, EZ­BUILD®, TELREX®, Gorilla Grip® Stainless Steel Boom Clamps, Butternut®, SkyHawk™, SkyLark™, SecureMount™, OMNI-TILT™, RF-PRO-1B®, AFHD­4® are trademarks of PDS Electronics, Inc. No license to use or reproduce any of these trademarks or other trademarks is given or implied. All other brands and
product names are the trademarks of their respective owners.
Specifications subject to change without notice.

For best service, please take a few minutes to review this manual before you call.

© DX Engineering 2018

1200 Southeast Ave. - Tallmadge, OH 44278 USA

Phone: [phone] ∙ Tech Support and International: [phone]

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