AMCO offers Wheel Offset Harrows with 10½” blade spacing in four options. Primary tillage models are available in both 50″ main frames or 86″ main frames (designated with a “B”).

  • Get a Quote Value Your Trade
  • Send to a Friend
  • Payment Calculator

    • Get information on the Heavy-Duty Primary Tillage: J42, J42B

    Fields with asterisks* are required. Please email our helpful staff with any questions or comments using the contact form.

    Send your friend information on the Heavy-Duty Primary Tillage: J42, J42B

    Fields with asterisks* are required. Your friend will receive an email that contains a reference to this page. Please send this email only to people you know who would be interested in this information.

    Requesting Trade In on Heavy-Duty Primary Tillage: J42, J42B

    Contact Information
    Equipment Interested In
    Trade Information

    Request A Demo

    Fields with asterisks* are required.

    Loan Calculator

    Use the Loan Calculator to help you determine the financing and payment options that are best for you.

    Amount Financed ($)
    Interest Rate (%)
    Loan Term in Months
    Monthly Payment Calculated

    **The accuracy of this calculator and its applicability to your circumstances is not guaranteed. You should obtain personal advice from qualified professionals. This information is provided for illustrative purposes only and does not constitute an application. This notice does not guarantee loan approval, nor is it an offer or commitment to make a loan to you on the above terms.

Shopping Tools
Contact Salesman
Request Demo
Apply for Financing

Heavy-Duty Primary Tillage: J42, J42B Features & Benefits

This heavy-duty primary tillage tool cuts and sizes residue, eliminates clumps, and loosens packed soil, helping you prepare your ideal seedbed. It’s ideal for a wide range of applications.

  • Disc gangs feature maintenance-free bearings with three-year warranty; bearings eliminate possibility of contamination and need for re-lubrication
  • Features 1½” square, high-carbon, cold-rolled steel axles
  • Standard unit comes with 24″ diameter x ¼″ thick plain blades with diminishing leveling blades
    • Optional blade diameters and thicknesses are available
  • Equipped with ³⁄₁₆” x 6½” x 8” high-carbon steel, replaceable, adjustable scraper blades mounted on bars of 2½” x 2½” square tubing; the scrapers are attached to the 2½” x ½” thick arms with heavy-duty U-bolts
  • Includes heavy-duty bearing risers or Shock Absorber Bearing Risers
  • Dual wheels improve flotation
  • Positive screw-type depth control maintains set cutting depth
  • Wear guards protect bearing housings and zerk guards protect grease fittings
  • Includes an adjustable 88½” tongue with base hitch and tongue jack
  • Heavy-duty 3,000 PSI hydraulic cylinders adjust cutting depth and raise the disc for transport
  • Features outriggers of 18’8″ and 20’6″
  • Backup blades provide added support for working blades
  • Weights of 164 to 208 pounds per blade
  • Safety features include safety chains, slow-moving placard, and light kits

Heavy-Duty Primary Tillage: J42, J42B Specs & Compare

Model J42
50″ Main Frame
ModelJ42-2024J42-2424J42-2824
Cutting Width*8'8″10'4″12'0″
No. of Disc Blades202428
No. of Bearings6810
Approx. Engine HP Required101-128122-162135-176
Approx. Weight lbs.**3,9374,6145,037
86″ Main Frame
ModelJ42B-2824J42B-3224J42B-3624J42B-4024J42B-4424**J42B-4824**
Cutting Width*12'0″13'8″15'4″17'0″18'8″20'6″
No. of Disc Blades283236404448
No. of Bearings101212121616
Approx. Engine HP Required149-189169-203189-236216-257236-277257-297
Approx. Weight lbs.**6,0636,5586,9107,8038,3898,741

*To calculate weight/blade, divide the approximate weight of the model by the number of disc blades.
**Equipped with auxiliary frames, clamps, and 8-hole hubs with 15″ x 10″ 8-hole wheels.
Specifications subject to change without notice.