AR400 arms built to outlast your originals - shipped same day, backed by a 5-year no-wear warranty.

Built from abrasion-resistant (AR) steel to outlast factory Case IH cast arms. Engineered to reduce pivot wear, restore row unit stability, and maintain consistent planting depth in demanding field conditions.

Manufactured from high-strength AR steel to resist hole elongation common in factory Case IH parallel arms. Precision-machined for proper bushing fit and long-term durability.

Precision-cut from hardened AR steel for improved wear resistance over factory Case IH brackets. Maintains tighter row unit alignment and longer service life.
Worn parallel arms let your row units rock instead of tracking the ground. That means inconsistent planting depth, uneven emergence, and a stand that costs you bushels - and it always shows up right when you can least afford downtime: planting season.
Carlyle Metals builds direct-fit Case IH planter parallel arms from AR400 abrasion-resistant steel - hardened to around 400 Brinell, the same wear-plate steel used in skid-steer buckets and dozer edges. It's built to resist the wear and elongation at the pivots that make row units sloppy - so these arms don't just replace worn parts, they outlast them. Precision laser cut, CNC machined bushing holes, Robotic welded to spec, and made in the USA. In stock and out the door the same day, so you're in the field when it matters.
AR400 (Carlyle arms)
Mild steel (A36)
Cast / ductile iron
360-440
120-160
130-300 (grade-dependent)
Harder steel resists abrasion and pivot wear. We anchor on AR400's own hardness - not a claim about what any particular OEM or competitor arm is made of - and back it with the 5-year warranty. If your OEM arms are cast iron, add the toughness angle too: cast can crack under impact; fabricated AR400 won't.
Built to outlast your OEM arms. If they wear out or fail from a defect within 5 years, we replace them free. Fits your planter or your money back - and we cover return shipping.
"Absolutely best parallel arms out there. I have told many people these are the best you can get."
"I bought a brand new planter and swapped the brand new arms with my Carlyle arms. I put the new John Deere arms on the planter I was selling."
"These arms have planted over 50,000 acres. I wanted to pull them off and check to see if there has been any wear. I was blown away they hadn't wore at all, not even the bushing."
Fits on series planter:
Please reach us at austin@carlylemetals.com if you cannot find an answer to your question.
Factory Case IH parallel arms are typically manufactured from softer cast materials. Over time, constant row unit load causes the pivot holes to elongate and the arm to flex. This leads to loose row units, inconsistent planting depth, and premature wear.
Genesis Case IH parallel arms are built from abrasion-resistant steel to reduce wear and maintain tighter tolerances longer.
Yes. Genesis Case IH Parallel Arms are designed to work with standard OEM-style bushings and hardware. Each arm is precision-machined to maintain proper fit and alignment, allowing straightforward installation without modification to your existing planter.
Common signs include:
• Side-to-side row unit movement
• Uneven planting depth
• Worn or egg-shaped pivot holes
• Excessive bushing wear
If these signs are present, replacing the arm restores proper row unit stability.
Because Genesis arms are built from abrasion-resistant steel rather than cast material, they typically last significantly longer under the same field conditions.
Genesis arms address the root cause of failure — arm wear itself.
Instead of relying on additional bushings or sleeves, Genesis uses stronger steel to maintain structural integrity and reduce long-term wear.