Boerkey - Machine Roller - Constant use - Capacity 88 tons - MPN AM-H-Cr#5L-G
Model KM#5L
Availability: Usually Ships Within 6 - 8 weeks
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Capacity
88 tons
Height
6.7 inches
Includes
One roller with chain (assembled)
Quick Info
Includes:
- One machine roller (Color: Maroon)
Uses:
- High frequency / constant use
- Permanently loaded Long distance travel
- High safety capacity against point loading and side forces (wind)
- Easy rolling after long standstill under load
- Sideways & radial use (for rotating loads)
Features:
- Roller wheels with center routing groove
Manufacturer: Börkey ("Boerkey"), Made in Germany
Construction:
- Super robust interlocking carbon steel frame construction
- Hardened steel center plate
- Hardened 50CrV4 steel load wheels
- Center chain guide
Corrosion Resistance:
- Multiple options available (see below)
Applications: Used for hangar doors, constantly moving cranes, train systems, to rotate telescopes, to enable tubular rotation, for ship building, and machine engineering. Use also upside-down as conveyor.
Manufacturing
Original Inventor and Manufacturer of Machine Rollers
Börkey - Since 1945
Toolwell: Exclusive North American distributor for Boerkey
- US-based Sales
- Stocked and Shipped from the US
- Engineering & Lifetime Technical Support
Specifications
Capacity (kN)
880
Capacity (Tons)
88
Height (In)
6.7
Length (In)
22.8
Manufacturer
Boerkey
Max Speed At Full Load (Ft/Min)
16
MPN
AM-H-Cr #5L-G
Total Number of Wheels
21
Weight (Lbs) - Product weight
229
Weight (Lbs) - Shipping weight
229
Wheel Diameter (In)
2
Wheels under stress
8
Width (In)
11.8
Börkey Color Coding
Identifying Colors:
Blue: Standard Machine Rollers (listed in hardcopy catalog, available on request).
Maroon: Machin Rollers with Hardened Center Plate (standard on this US model)
Customizations
Guiding Side Casters
Optional Add-on Packages (see *Ordering Guide, **Dimensions and ***Pictures under Product Guides & Documents):
Corrosion Resistance for Outdoor Use
Accessories and Customizations
Product In Use
Customer photos using Super & Ultra Duty Machine Rollers
These machine rollers are used for long-term or permanent load holding and moving in applications such as bridge construction, offshore structure & equipment rolling, bunker doors and gantry crane operation.
Product Guides & Documents
Which Machine Roller for which application?
Use Standard Duty Rollers for short term projects such as Machinery Moving:
Use Heavy Duty Rollers for medium-term projects such as steel erecting, general construction or machine fabrication:
Use Super Duty Rollers for permanantly loaded or long-term loaded loads for projects such as bridge construction, structure repositioning, machine and equipment repositioning, or in marine and offshore applications.
Use Ultra Duty Rollers for loads that roll frequently such as gantry cranes, rotating machinery or container hoisting.
All machine rollers look the same. What are the differences?
A Börkey Machine Roller is available in many variations as every Börkey Roller can be built to best match a specific application. Starting with a base roller construction, each component can be upgraded to improve durability, reliability and functionality. The highest possible quality may certainly be required when moving a nuclear reactor, but not every application calls for the most expensive machine roller configuration as each component upgrade increases the cost.
It is important to remember that the roller selection should always exceed the application requirements for safety and usability, however, consider selecting a cost-effective machine roller configuration that makes economic sense in relation to the application. Hence Börkey has created different levels of quality to suit different application requirements.
The graphic below provides a clear understanding of each quality aspect of a roller and will show which features – including component upgrades and construction methods – are included on which roller models.
Generic Competitors (Lower Quality)
Börkey Rollers (Higher Quality)
Models by Construction Type
Standard Duty
Heavy Duty
Super Duty
Ultra Duty
Rolling Resistance of Machine Rollers
Roller Size affect on Rolling Resistance
Rollers with fewer, larger diameter wheels will roll more easily than those with more, but smaller wheels.
Wheel Sizes
Wheel size increases with roller size. Rollers are made to run on hard surfaces such as steel. If used on concrete, the floor may scratch. Therefore, consider roller size # 3 or larger if used on concrete or asphalt for lower rolling resistance and less wear on floors.
Measuring the Rolling Resistance
Rolling resistance when rollers run on steel:
#1 - 3v Roller Size: 5-7 % of load weight
#4 - 6 Roller Size: 3-5 %
Additional Break-out Resistance: Zero
Weather & Corrosion Resistance
The steel components of the rollers will naturally develop surface rust in weather. Minor surface rust does not decrease the performance.
Long-term stationary exposure to weather and extreme conditions such as saltwater can degrade the rollers and weatherproofing options are available as follows:
More details:
Standard, included. Short-term outdoor use
Frame zinc-phosphate coated, wheels blackened, roller chain (load wheels, axles and links) galvanized.
If rollers are used outdoor and in bad weather conditions, the surface rust may form on the roller chain. This will lead to increased rolling resistance. This level of protection will prevent surface rust on the moving parts. Protects the rollers during use in bad weather for 2-6 weeks.
Option S. Longer-term outdoor use
Frame galvanized, Load wheels galvanized, Axles and links in stainless steel.
The body and the rollers can rust when using the rollers for 6 weeks up to several months in bad weather. Rust increases rolling resistance and after longer periods will result in locking up of moving parts. Add-on option “S”. prevents corrosion of the frame and rusting of the moving parts for continued easy rolling. Typical use: Bridge construction.
Option M. Offshore and maritime use
Frame coated with 4-layer offshore coating, Load wheels galvanized, Axles and links in stainless steel.
Maritime environments and - in particular - saltwater conditions can lead quickly to deterioration of the entire roller assembly. Add-on option “M” will protect the roller against such damage and loss of function. Includes a protocol certifying thickness of the coating. Approved by ABS and DNVGL for offshore use.
Börkey rollers are made to run on a solid strong surface such as steel.
Operating the rollers across concrete floors – especially repeatedly along the same path - may damage the floor.
Machine Skate vs. Machine Roller
Each type of skate has a different application range. Know which roller to use for which application:
Considerations When Choosing Roller Capacity
Machine Rollers should ideally be used on solid surfaces such as steel, so the weight is equally divided across each load wheel.
When operating 4 machine rollers on uneven surfaces such as concrete, select a roller with double the mathematical roller capacity to safeguard against overloading due to the load rocking and shifting. If operating more than 4 machine rollers, carefully select suitable roller capacity to prevent overloading in case load rocks on uneven surfaces and shifts weight.
SOLID/SMOOTH SURFACE or TRACK
Example: An equally distributed load of 40 tons, translates into 20 tons to be supported on each side
Capacity needed: 10 tons each machine roller
IMPERFECT/TEXTURED SURFACE
If the load rocks on an uneven surface, one roller loses contact with the load and the weight shifts to the closest roller
Capacity needed is doubled: 20 tons each machine roller
Additional Considerations
Wheels can be point-loaded when travelling over recesses and uneven surfaces ... or when hitting an obstacle
Side forces such as wind may cause uneven weight distribution on rollers resulting in possible side/ overloading
Consider selecting higher capacity machine rollers to offset the hazards of point-loads, uneven weight distribution, and side forces.
How is “Load Capacity” really rated ?
Börkey machine rollers can be used at the full rated capacity in the field.
The rollers have additional safety capacity.
The rollers have additional safety capacity.
Individual machine roller capacities are calculated based on moving the load across a solid level & smooth surface so that all load wheels are touching the floor and distributing the weight equally.
All Börkey products are covered under a manufacturer's warranty:
1 Year on all Börkey products
Coverage
The manufacturer warrants that the products are free from material or workmanship defects, provided they are subject to normal and intended use. The manufacturer may replace the product or may provide replacement parts, in accordance with the provisions of this warranty policy, any of its products during the duration of the warranty, if it is determined that the product has a material or manufacturer defect.
Limitations
The warranty does NOT cover damage resulting from improper use of the equipment, such as overloading, accidents, abuse, or misuse, modification, negligence after purchase, ordinary wear and tear, and/or failure to follow the product’s operating instructions or safety regulations.
Initiating a Claim
In the event of a defect in North America or South America, notify Toolwell of the circumstances in order to obtain warranty instructions. Depending on the nature of the defect, Toolwell will offer at its discretion one of two options:
- Replace the defective product. All defective dollies, skates, and jacks must be returned to Toolwell.
- Replace the defective part. The defective part may be discarded.
Warranty Period
This warranty lasts for one (1) year on all Börkey products from the date of original purchase.
DISCLAIMER
There are no warranties made by the manufacturer or the manufacturer's agent, expressed or implied, except as specifically set forth above.
Any Börkey product is purchased by buyer “as is” and “with all faults” and Börkey or the manufacturer's agent makes no warranty of merchantability or fitness for any particular purpose.
Under no circumstances shall Börkey or the manufacturer's agent be liable to buyer or any other person for any special, incidental or consequential damages, including, without limitation, damages based upon lost good will, lost sales or profits, work stoppage, delay, product failure, impairment of goods or otherwise and whether arising out of breach of warranty, breach of contract, negligence or otherwise, and in any case, Börkey’s (or the manufacturer's agent’s) liability for any and all losses and damages sustained by buyer and others, arising out of or by reason of this contract shall not exceed the original purchase price of the products upon which liability is founded.
Börkey or the manufacturer's agent is NOT responsible for ANY loss, liability, injury or damage which results from use of the products. The term “use” refers to any and all operation of the products, from misuse and abuse of the purchased tools to operation of faulty or defective products to proper use which results in a mistake or accident. Customer purchases and uses these products at his own risk.
The manufacturer and the manufacturer's agent neither assumes nor authorizes any other person to assume for it, any liability in connection with the moving equipment or sale thereof, other than expressed herein.
Börkey and Toolwell reserve the right to amend or adapt these warranty conditions with implications for the future at its discretion at any time.
In 1945 Walter Börkey invented the world's first modern machine roller skate.
Mass production of the machine rollers started in in 1951 in Hagen, Germany and over the last 70+ years Börkey imroved and expanded its product line using the latest design and manufacturing technologies.
Today Börkey is owned and operated by the 4th Generation of the Börkey family and the products are still engineered and manufactured in Germany.
With machine rollers offered and built in nearly every size and capacity, Börkey has solutions for a wide variety of industries ranging from machine transports and maintenance to oil & mining, shipbuilding, to aerospace and nuclear power.
Toolwell - America’s leading expert in load moving equipment is Börkey’s exclusive manufacturer’s rep for North America, providing sales, parts and service.
Why Börkey? 
Every manufacturer claims to produce QUALITY. What does that really mean?
Börkey Quality – By every meaning of the word - Made in Germany
Optional Guiding Casters
Guiding Casters are available in many variations.
Example Pictures - See Ordering Guide for Various Configurations
Guiding Casters are available in many variations. Example of 4 Guiding Casters
Example of 1 Guiding Caster
Also-Bought Products
Description
Machine Roller Information
Model Series:
- U.S. Model Series: KM
- Manufacturer Part Number (MPN): AM-H-50CrV4
- Manufacturer product name: Roller Skate – The Super Robusts
Uses:
- For frequent use
- Ideal for use under constant load.
- For rolling long distance
- High safety capacity against point loading (under forward and backward rocking forces) and side forces (such as wind)
- Easy rolling after long standstill under load
- For radial forces (for continuous rotating loads)
Features:
- Bolts on for permanent attachment to load or machine.
- Model sizes # 1-3v have 4 bolt holes standard. Model sizes # 4-6 have 6 bolt holes standard.
Included:
- Each roller sold separately
Quality Level Classification:
- Ultra-Duty Roller (Levels: Standard | Heavy | Super | Ultra)
Construction:
- Super robust carbon steel construction with interlocking frame design
- Hardened steel center plate
- Super Duty 50CrV4 hardened steel load wheels
- Center chain guide with grooved wheels
Corrosion Resistance:
- Blackened load wheels plus zinc-phosphate coated frame for basic corrosion resistance.
- Additionally, galvanized load wheels, axles and links provide upgraded weather resistance.
- Further stainless steel and marine and offshore coating are available at request for upgraded weather resistance. See Weatherproofing Option Packages
Certifications:
- LRS, ABS and DnV off-shore approved versions available on request.
Applications:
- Used for hangar doors, constantly moving gantry cranes, container unloading, train systems, used to rotate telescopes, to enable tubular rotation, for ship building, and machine engineering, for guidance of components.
- Rollers can be used up-side-down as a conveyor, when the Rollers are stationary while the load is moving.
Use in vertical position:
- Check with the manufacturer before selection of Rollers for use in a vertical position.
Manufacturer:
- Manufactured by Börkey
- Made in Germany
Other specs:
- Maximum safe speed: 16 feet per minute.
- Minimum turning radius: 10 feet.
- Rolling resistance (on solid surface such as steel)
- Sizes # 1-3v: 5-7 % of load weight
- Sizes # 4-6: 3-5 % of load weight
Other Important Information:
- Individual machine roller capacities are calculated based on moving the load across a steel surface (all wheels are touching the floor and the load weight is equally divided across the roller footprint). When using 4 (or more) rollers, load may rock on uneven surface, increasing load weight applied to any roller. Therefore, select suitable rated roller capacity carefully.
- Börkey Machine Rollers are made to run on a solid strong surface such as steel. Operating the machine rollers across concrete floors – especially repeatedly along the same path - may damage the floor. For best results use on suitable tracks, e.g., crane rails or steel beams.
- The track or floor surface is vital for the safe transportation of the load, not just the carrying capacity of the Roller. Movement on tarmac and concrete is restricted, and the rollers should never be used on uncovered tile. For best results on tile, concrete, or tarmac we recommend putting a steel plate of a minimum of 0.4-inch thickness underneath.
- Machine Rollers with larger diameter wheels will roll more easily than those with smaller wheels. Problems such as high rolling resistance on certain surface types such as concrete, or resulting floor scratching, can be avoided by choosing roller models with a larger load wheel diameter. Consequently, if moving across concrete floors, size #3 rollers (1.2 inch/30mm wheel diameter) or larger should be used.
- Precautionary measures must be taken for use on inclines to avoid run-away loads!
- When mixing and matching machine rollers (or different load supports), keep the load at same loading height. Otherwise rollers will tip and become point-loaded.
Optional packages available:
For weather proofing the machine rollers are available with the following add-on option packages:
- Option S - Frame galvanized, Load wheels galvanized, Axles and links in stainless steel for longer-term outdoor use.
- Option M - Frame coated with 4-layer marine & offshore coating, Load wheels galvanized, Axles and links in stainless steel for offshore and maritime use.
How Does This Machine Roller Differ From Other Börkey Models?
Every Börkey machine roller starts with a “Made-in-Germany” - interlocking solid frame design, however, each component can be upgraded to improve certain performance characteristics allowing a perfect configuration for any application.
The standard Börkey machine roller features the Solid frame construction with hardened steel load wheels. These Machine Rollers are specifically made for installation of machines & material handling where the rollers are only loaded for a short time and roll short distances. (Models KK, KN and KC).
Hardening the center plate additionally significantly improves the ease of rolling after long standstill under load. These Robust Rollers are made for loads that sit longer on the dollies, roll a short distance but must roll after an extended period of inactivity such as during construction. (Models KB and KA.)
Further upgrading to the Super Robust construction provides superior strength and stability against torsion and fatigue over time under extreme loads and extreme rolling forces. Using load wheels manufactured from hardened 50CrV4 steel creates a higher safety capacity against point loading (rocking) and side forces (wind). The addition of a “channel”-type chain guide to the center plate keeps the load wheels in a track preventing wheels from scraping against the walls and prevents chain damage. These Machine Rollers are specifically made for permanent load carrying, where loads sit on these rollers for many years, must roll a long distance, and must be safe even when subjected to rocking or side forces. (Models KS and KZ.)
By adding a groove into the middle of each wheel and outfitting the center plate with a “center”-type chain guide to run inside the wheel groove wear on the wheels is completely eliminated. This allows the machine rollers to be used frequently. (Model KM)
All machine roller models have “blackened” wheels plus a zinc-phosphate coated frame to provide a durable basic level of corrosion resistance. Galvanization of wheels, axles and links improves the corrosion resistance significantly. (Models KB, KA, KS, KZ and KM). Additional options such as galvanization of frame, stainless steel components and marine & offshore coatings are available. (Models KS, KZ and KM).