BUCKINGHAM MFG.
OX BLOCK
TM
Instructions and Warnings
OVERVIEW
The Buckingham OX BLOCK is a rope snatch block with an integrated
friction bar used for lowering loads, snubbing loads, and raising loads.
It allows the rigging professional to handle loads with greater control.
When lowering loads, tension is transferred from the worker to the
OX BLOCK. The OX BLOCK replaces standard handline blocks, parted
blocks, and various snatch blocks. The OX BLOCK also has greater
Working Load Limits than blocks of similar size.
ATTACHMENT METHODS
The Buckingham OX BLOCK is supplied as an independent unit with either a Swivel Eye (PN 50061), a Shackle Top (PN 50062), is
available with permanently attached slings (Swivel Eye models) or removable slings (Shackle Top models) {See last page of this
document for sling / hardware removal and installation instructions}. The section below outlines some of the basic congurations
to attach the OX BLOCK. All of the congurations shown below can be made with either model. PN 50062AC-Length (Shackle Top
model) with attached sling and hook is shown below for reference. The supplied slings have a WLL of 2500 lbs. when rigged as
shown. Warnings: OX BLOCK with Shackle Top (PN 50062) when supplied as an independent unit (without sling and or hardware)
are assembled with the Nyloc Nut being loosely threaded on the Shoulder Bolt. Therefore before use, ensure the Nyloc Nut is
completely tightened so that it bottoms out against the shoulder of the bolt.
PN 50062AC-Length Choked Conguration: Basket Hitch Conguration:
1. Pass loop end
around pole.
2. Then pass
block through
loop.
3. Pull on tail to
tighten sling
around pole.
4. Smooth out
adjuster.
Patented
1. Pass loop end
around pole.
2. Connect carabiner
from OX BLOCK
swivel to loop
(with gate facing
outward).
3. Pull on tail to
tighten sling
around pole.
4. Smooth out
adjuster.
Double Basket Hitch Basket Hitch Over Cross Arm:
Conguration:
1. Pass loop end around 1. Pass loop end over cross arm.
pole twice. 2. Connect carabiner from OX
2. Connect carabiner from BLOCK swivel to loop.
OX BLOCK swivel to loop 3. Pull on tail to shorten sling
(with gate facing outward). and raise OX BLOCK to
3. Pull on tail to tighten sling desired height.
around pole. 4. Smooth out adjuster.
4. Smooth out adjuster.
OX Block Instructions and Warnings (Rev. 5/22/18)
PN 230325
1
BUCKINGHAM MFG.
OX BLOCK
TM
CONFIGURATIONS
Figure 1:
Common
Load
Instructions and Warnings
Figure 2:
Lowering Load With Friction
Load
Figure 3:
Snubbing Load
Load
3 wraps, 1 half hitch
minimum
Haul Line
Figure 4:
Raising Load
Haul Line
100 lbs
(45.3 kg)
Approximate line length required: (lift length x number of pulleys) + 1 lift length.
200 lbs
(90.7 kg)
2 Parts
2:1
50 lbs
(22.7 kg)
Pulley
Haul Line
200 lbs
(90.7 kg)
4 Parts
4:1
Haul Line
33.3 lbs
(15.71kg)
Pulley
200 lbs
(90.7 kg)
6 Parts
6:1
WARNING:
This equipment is
intended for use by
properly trained professionals only.
WATCH THE VIDEO
www.buckinghammfg.com/OX
OX Block Instructions and Warnings (Rev. 5/22/18)
PN 230325
2
BUCKINGHAM MFG.
OX BLOCK
TM
Instructions and Warnings
FRICTION ASSISTANCE
For lowering loads with friction assistance, wrap the rope around
the friction bar in the direction as shown (clockwise or counterclockwise):
Two times through the gate (2 audible clicks) provides one full wrap.
Three times through the gate (3 audible clicks) provides two wraps.
HAUL-LINE TENSION REDUCTION (WHEN LOWERING LOADS)
On average, one wrap will reduce haul-line tension by a factor of 4:1.
On average, two wraps will reduce haul-line tension by a factor of 10:1.
Cautiously lower the load with extra belay friction to ensure the load can be adequately
handled. Weight consideration must be given when lowering loads. i.e. if lowering a 200
lb. load with the haul line over only the sheave the user would be holding the entire
200 lb. load, if using 1 wrap (4 to 1 ratio) the user is holding 50 lbs., using 2 wraps (10
to 1 ratio) the user is holding only 20 lbs. Heavy loads require additional rope wraps
on the friction bar as shown below or may require the use of an additional mechanical
advantage.
*
No Wraps
*
1 Wrap
4:1
WARNING:
Faceplate must be fully
latched, the button engaged
and the gate fully closed
before applying load.
Friction will vary
depending upon on
rope material, size and
condition. Always test
your OX BLOCK rigging
in a safe manner to
determine hold back force
desired and number of
wraps you will use on OX
BLOCK
friction bar.
Haul line tension will
vary based on these
factors: Diameter of rope,
construction of rope,
material of rope, clean,
dirty, wet or dry rope.
*
2 Wraps
10:1
Haul Line
200 lbs
(90.7 kg)
200 lbs
(90.7 kg)
Haul Line
50 lbs
(22.7 kg)
200 lbs
(90.7 kg)
** *
*using 1/2” Duraplex
FRICTION ASSISTANCE CAN BE USED WITH THE OX BLOCK WHEN:
• the load must be lowered under controlled conditions and/or needs to be
periodically stopped during descent.
• the weight ground personnel must hold back needs to be minimized.
• rescuing the injured from heights.
• the load can be transferred to the OX BLOCK without having to rst lift the
load, or the load can be safely lifted by one person and transferred to the OX
BLOCK (for heavier loads that need to be lifted before being lowered,
congure two OX BLOCKS into a parted conguration).
• avoiding damage to trees, fences, vehicles (and other items commonly used to
reduce friction when lowering loads with ropes ) is desired.
• ergonomic benets are desired for personnel that regularly work with ropes,
blocks, and rigged loads.
OX Block Instructions and Warnings (Rev. 5/22/18)
PN 230325
Haul Line
20 lbs
(9.1 kg)
200 lbs
(90.7 kg)
WARNING:
For loads that must be
lifted before being
lowered, friction assistance
should not be used unless
one person can safely lift
the load, or the load must
be lifted mechanically rst
and then lowered using
friction assistance of the
OX BLOCK.
3
BUCKINGHAM MFG.
OX BLOCK
TM
Instructions and Warnings
PROPER USE
1. Sheave-to-eye and hook-to-eye Working Load Limits must not be exceeded.
SHEAVE-TO-EYE
MBS = 10,000 lbs (4,536 kg)
WLL = 2,500 lbs (1,134 kg)
WLL 2,500 lbs
(1,134 kg)
WLL 1,250 lbs
(567 kg)
MBS (Minimum Breaking Strength) WLL (Working Load Limit)
WLL 1,250 lbs
(567 kg)
HOOK-TO-EYE
MBS = 6,000 lbs (2,722 kg)
WLL = 1,500 lbs (680 kg)
WLL 1,500 lbs
(680 kg)
WLL 1,500 lbs
(680 kg)
WARNING:
Use synthetic ropes only.
Not to be used with wire
rope or natural ber
ropes.
Maximum rope diameter
is 5/8”.
Always use adequate
anchorage.
2. The OX BLOCK must be free to align with its load, without obstruction of the
body or friction bar.
Load
Load
3. The OX BLOCK is designed for multi-braid synthetic ropes (maximum size 5/8”) and
should not be used with wire ropes or natural ber ropes.
4. Always ensure the OX BLOCK is attached to an adequate anchorage point that is capable of
safely supporting the load and that all rigging components (e.g. carabiners, hardware, pulleys, ropes,
slings, etc.) are rated and intended for use with the specic rigging application. In order to get the
full WLL from the OX BLOCK (sheave to eye) all components of the system must have a 10,000 lb.
rating and be congured so as not to reduce that rating. Ropes which have a higher safety factor
(generally 5 to 1) must have a 12,500 lb. rating to maintain the full WLL (sheave to eye) from the OX
BLOCK. The system components should be a minimum of 4 to 1 safety factor for exposure to heavier
loads. For example, if lowering 1000 lbs. the weakest link must be rated to 4000 lbs. minimum
breaking strength.
5. Loads being lowered with friction assistance should be lowered under control; never allow
running or free falling of a load. Use a hand over hand method to control the rope.
OX Block Instructions and Warnings (Rev. 5/22/18)
PN 230325
4
BUCKINGHAM MFG.
OX BLOCK
TM
Instructions and Warnings
6. Always close the faceplate before applying any force or load to the OX BLOCK.
7. Always ensure the friction bar safety gate is closed before applying any force or load
to the OX BLOCK.
8. Wear to the friction bar is minimized when ropes are clean and descent speed is
minimized; loads must never be allowed to run or free fall.
9. Slack must be kept out of the system to prevent high-impact falls.
10. The OX BLOCK is intended for use by medically t, specically trained, experienced
users.
11. Thorough and specic training is absolutely essential before use. Heights are dangerous.
It is up to you to reduce risks as much as possible, but risks can never be completely
eliminated. There are many ways to misuse this equipment—too many to list or even
imagine. You must personally understand and assume all risks and responsibilities of
using this equipment. If you cannot or do not want to do this, do not use this equipment.
INSPECT BEFORE AND AFTER EACH USE
The inspection should include, but not be limited to the following:
* Check all parts to ensure no corrosion, cracks, deformation, gouges or scratches, rough
areas or sharp edges that may abraid the rope or excessive wear exists.
* That the sideplate rotates normally & the button operates properly.
* The button is not be impaired by dirt, ice, corrosion, etc.
* Swivel / shackle top rotates freely and has no excessive vertical movement.
* The swivel / shackle top bolt is tight and the roll pin used to hold it is in place.
* Shackle Top models: the Nyloc Nut on the hardware attachment Shoulder Bolt is in place
and completely tight.
* Ensure smooth rotation of the sheave and proper operation of the gate.
INSPECT DURING USE
Regularly inspect and monitor OX BLOCK while in use, conrming proper connections,
position, fully locked faceplates and gate, and fully extended buttons.
The OX BLOCK like all equipment must be replaced by the user at regular intervals. This
interval should be dictated by the amount of use and type of service the product receives
rather than a set time frame. Therefore the manufacturer does not place a time limit on
replacement of the OX BLOCK. Due to the rigorous strain the OX BLOCK endures, it should
be replaced at the earliest signs of wear. OX BLOCK inspection is extremely important and
must as a minimum be performed as stated.
If any evidence of wear or deterioration as outlined is observed, immediately cease use,
destroy the product, and replace it with new equipment. Should any unusual conditions
not outlined above be observed or you have reasonable doubt about a particular condition,
remove the equipment from service and notify your Supervisor, Safety Director, or contact
Buckingham Mfg. Co. for clarication.
WARNING:
Thorough and specic
training is absolutely
essential before use.
Always refer to rope
manufacturer’s
instructions and warnings.
MAINTENANCE & STORAGE
Clean if necessary with fresh water, then allow to dry completely without using excessive
heat. The button may be cleaned by holding it upside down & spraying a light lubricant into
it while operating it. Store in a dry place away from extremes of heat and cold, and avoid
chemical exposure.
PRINCIPAL MATERIAL
Aluminum alloy, anodized.
REPAIRS OR MODIFICATIONS TO EQUIPMENT
Only Buckingham Mfg. Co. or those people authorized in writing by Buckingham Mfg. Co.
may make repairs / modications to this equipment. Therefore, do not alter, modify or repair
this product.
WARNINGS
• This equipment is intended for use by properly trained professionals only.
• Manufacturer’s instructions shall be provided to the user of this product. If additional copy
is needed, contact Buckingham Mfg. Co.
• Completely read, understand, and follow all instructions, warnings, and guidelines
pertaining to this and all associated equipment before use. Failure to do so could result in
your serious injury or death.
OX Block Instructions and Warnings (Rev. 5/22/18)
PN 230325
5
BUCKINGHAM MFG.
OX BLOCK
• Employer - instruct your employees as to proper use, warnings and cautions before use of this equipment.
• FOR RESCUE PURPOSES ONLY: This product is designed to be used by a person with a maximum weight of 350 lbs.
when fully equipped. In exceptional cases such as an accompanied descent (i.e. hurt man rescue) this system can be used
with a load of up to 600 lbs. if the following conditions are met:
* The rope used in the rescue system has a 6000 lbf. minimum static strength.
* The Ox Block shows no signs of excessive wear.
* At least 2 wraps of rope around the friction bar of the Ox Block are used if ground personnel are assisting in the
controlled descent of the rescuer and the victim.
* At least 3 wraps of rope around the friction bar of the Ox Block are used if the rescuer alone is to control his and the
victim’s descent.
* All personnel involved in this type of rescue shall be properly trained in this technique.
* No impact loading tolerated.
• Personal protection and rigging equipment, (i.e. fall arrest, work positioning, retrieval, suspension, travel restraint,
hoisting etc.) should not be resold or provided to others for re-use after use by original user as assurance can not be
granted that a used product meets criteria of applicable standards and is safe for use to a subsequent user.
• All components used with the OX BLOCK (carabiners, pulleys, rope, slings, etc.) shall be authorized Buckingham products.
Selection of components / products should be such that they aid the worker in the performance of their job and particular
work situation. Therefore, be certain this equipment is suitable for the intended use and work environment. It should only
be used for intended uses. If suitability for intended use is questionable, always consult your Supervisor, Safety Director
or contact Buckingham Mfg. at (607) 773-2400 or 1-800-937-2825.
• Destroy any and all equipment subjected to impact loading.
• As outlined by OSHA 1926.502 (e)(2) positioning devices shall be secured to an anchorage capable of supporting at
least twice the potential impact load of an employee’s fall or 3,000 lbf. (13.3 kN), whichever is greater versus
fall arrest anchor points which must support a minimum of 5,000 lbf. (22.2 kN) per attached worker and be
Independent of worker support.
• Avoid rubbing of unit components against abrasive surfaces and sharp edges.
• Avoid contact of this equipment with high temperature surfaces, welding or other heat sources.
• Use this product only in combination with compatible equipment.
• Use this equipment only for the specic purpose for which it is designed and intended.
• Wearing gloves while using this product is highly recommended.
• Only Buckingham Mfg. Co. or those people authorized in writing by Buckingham Mfg. Co. may make repairs / modications
to this equipment.
• Product covered under these instructions / warnings should not be resold / redistributed or reused after use by original user.
• CARABINER USE: Carabiners are acceptable for overhead lifting only under the following circumstances:
* Carabiners (10,000 lbf. MBS) supplied by Buckingham and meeting the ANSI Z359.12 standard must be used.
* Carabiners must only be loaded along the major axis near the spine. Never cross load a carabiner.
* Carabiners must never be shock loaded. If shock loaded they must be removed from service.
* Working load limit must not exceed 25% (4 to 1 safety factor) of the breaking strength on the carabiner.
• Employer - instruct employees as to proper use, warnings and cautions before use of this equipment.
TM
Instructions and Warnings
DETAILED INSPECTION
In addition to inspection before, during, and after each use, it is recommended that a detailed inspection by a competent
inspector be done at least every 3 months (or more frequently, depending on amount and type of use). Make a copy of these
instructions and use one as the permanent inspection record; keep the other with the equipment. It is best to issue new gear
to each user so they know its entire history.
Date of Purchase Date of 1st Use User
Date Condition Inspector
BUCKINGHAM MFG. CO., INC.
BINGHAMTON, NY
1-800-937-2825
OX Block Instructions and Warnings (Rev. 5/22/18)
PN 230325
www.buckinghammfg.com
6
BUCKINGHAM MFG.
OX BLOCK
TM
Instructions and Warnings
SLING / HARDWARE - REMOVAL / INSTALLATION
OX BLOCKs with Shackle Top (PN 50062 series) can be congured to accept various length slings or approved optional hardware
(Rigging Hook is shown below).
SLING / HARDWARE - REMOVAL
1. Remove the Nyloc Nut from the Shoulder Bolt using a 3/8” drive ratchet, 9/16” socket and a 1/4” hex wrench or similar.
2. Remove the hardware by pulling the Shoulder Bolt through the connecting eye of the hardware.
3. Remove the Shoulder Bolt by pulling it completley through the Shackle Top.
4. Retain the Shoulder Bolt for re-use.
5. Discard the Nyloc Nut. (A new Nyloc Nut must be used for each reassembly. The Nyloc Nut is intended to be used one time only.
Never re-use the Nyloc Nut). OX BLOCKs with Shackle Top (PN 50062 series) are supplied with one extra Nyloc Nut.
(Additional replacement nuts are available from Buckingham by calling 1-800-937-2825).
SLING / HARDWARE - INSTALLATION
1. Obtain a new Nyloc Nut.
2. Insert the Shoulder Bolt through either hole in the Shackle Top.
3. Place any Buckingham approved optional hardware between the sides of the Shackle Top and insert the Shoulder Bolt through
the connecting eye of the hardware and through the second hole of the Shackle Top.
4. Thread on the Nyloc Nut and securely tighten it using a 3/8” drive ratchet, 9/16” socket and a 1/4” hex wrench or similar.
5. The Nyloc Nut must be completely tightened so that it bottoms out against the shoulder of the bolt.
Patented
For more information, visit BuckinghamMfg.com/Patents.
OX Block Instructions and Warnings (Rev. 5/22/18)
PN 230325
7
Loading...