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Boerkey - Machine Roller - Full height - w Galvanized chain - Capacity 85 tons - MPN A-H#5-G

Model KA#5
Availability: Usually Ships Within 6 - 8 weeks
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85 tons
6.5 inches
One roller with chain (assembled)

Quick Info

  • One machine roller (Color: Maroon)
  • Months of static load bearing 
  • Short distance travel Intermittent rolling 
  • Easy rolling after long standstill under load 
  • Bolt-on 
  • Full height (with top plate for higher frame strength)

Manufacturer: Börkey ("Boerkey"), Made in Germany
  • Robust interlocking carbon steel frame construction 
  • Hardened steel center plate 
  • Hardened load wheels 
Corrosion Resistance: 
  • Wheels blackened, zinc-phosphate coated frame, and galvanized wheels, axles & links for upgraded corrosion resistance. 
Applications: Used in ship building, steel and mining, machine fabrication, general construction and in heavy industry. Use also upside-down as conveyor.


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


Capacity (kN)
Capacity (Tons)
Height (In)
Length (In)
Max Speed At Full Load (Ft/Min)
A-H #5-G
Total Number of Wheels
Weight (Lbs) - Product weight
Weight (Lbs) - Shipping weight
Wheel Diameter (In)
Wheels under stress
Width (In)

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)

Product In Use

Customer supplied - Pictures
Intro to Boerkey



Product Guides & Documents

Printable Details Printable Details
Engineering Drawings (inch) Engineering Drawings (inch)
Engineering Drawings (mm) Engineering Drawings (mm)
Mounting Holes Mounting Holes
Certification Certification
MSDS Lubricant MSDS Lubricant
MSDS Standard Frame Coating MSDS Standard Frame Coating
Which Roller?
Roller Construction
Rolling Resistance
Weather Resistance
"Roller" vs. "Skate"
Selecting Roller Capacity
Defining Capacity
About Börkey


Machine Roller Information

Model Series:

  • U.S. Model Series: KA
  • Manufacturer Part Number (MPN): A-H (with option package G)
  • Manufacturer product name: Roller Skate – The Robusts


  • Machine rollers are ideal for months of static load bearing.
  • They excel at short distance rolling.
  • Intermittent travel also works very well.
  • These machine rollers continue to easily roll even after long standstills under heavy loads.


  • Full height machinery machine rollers with the top loading plate provides extra support.
  • Model sizes 1 through 3v have four bolt holes standard.
  • Model sizes 4 through 5 have six bolt holes standard.


  • Each machine roller is sold separately.

Quality Level Classification

  • Heavy Duty Machine Roller (Levels: Standard | Heavy | Super | Ultra)


  • Robust carbon steel construction with interlocking frame design
  • Hardened steel center plate
  • Hardened load 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.


  • Machine rollers are perfect for moving heavy loads in shipbuilding, steel and mining, machine fabrication, steel erecting and general construction.
  • They are often used on construction sites.
  • Machine rollers allow transporting equipment and other loads on steel frames.
  • They can be used up-side-down as a conveyor, where the rollers are stationary while the load is moving across.


  • 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 # 4-5: 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 machine 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 Machine Roller. Movement on tarmac and concrete is restricted, and the machine 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.

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 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).

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