Lonffery Trailer Axle Spring Perch Seats 4-Pack for 3-inch Round Axles — Weld-on Heavy-Duty

Lonffery 4-Pack Trailer Axle Spring Perch Seats are a weld-on, heavy‑duty kit made for 3" round axles that secures leaf springs and restores proper spring alignment for one axle.

If you need a reliable replacement or upgrade for trailer spring perches, this four-piece Lonffery kit gives you the exact hardware to mount leaf springs to a 3" round trailer axle. Built from high-strength steel and sized to common trailer dimensions, the perches make it straightforward to return your trailer to safe towing geometry when welded in place by a qualified technician.

How will these perch seats fit my trailer axle?

Each perch is engineered specifically for 3" round axles and matches common spring and bolt dimensions so you can replace worn or missing perches without fabrication. The curved base sits flush against a 3" diameter tube, and the center hole accepts standard spring center bolts.

• Designed for 3" round trailer axles (curved base diameter: 3").
• Perch length: 4", width: 1.85", hole diameter: 0.67".
• Four pieces included — enough for one full axle (two per side).
• Weld-on mounting for permanent, secure attachment.

What materials and strength features do these perches offer?

Lonffery perches are formed from heavy-duty steel to resist deformation under load and provide a durable bearing surface for leaf springs. The steel construction helps maintain spring alignment and reduces movement that can accelerate wear on springs, U-bolts, or the axle tube.

• High-strength steel construction for long service life.
• Precision-formed shape to distribute load across the axle tube.
• Weld-ready edges and consistent hole sizing for reliable installation.

How difficult is installation and what tools are required?

Installation is intended as a weld-on job for someone with welding experience or access to a qualified welder. Proper fit-up and a continuous weld around the perimeter produce the best long-term result; tack-welding before final welding helps ensure correct alignment.

• Weld-on installation — requires MIG, stick, or TIG welding capability.
• Recommend cleaning axle surface, test-fitting, and tack-welding first.
• May require grinding, primer, and corrosion protection after welding.

Will these work for the trailers and loads I tow?

These perches are suitable for medium-duty cargo trailers, flatbeds, and small farm trailers with 3" axles. They restore spring-to-axle interface integrity but should be used with correctly rated springs, U-bolts, bearings, and other suspension components sized for your trailer’s load.

• Best for medium-duty trailer applications and small farm trailers.
• Not a substitute for under-rated springs or damaged axle tubes — inspect surrounding parts.
• Sold as a 4-piece set — replaces perches for a single axle.

Who is this for: The Lonffery 4-Pack Trailer Axle Spring Perch Seats suit DIY mechanics, mobile welders, trailer repair shops, and owners of medium-duty trailers who need an accurate, heavy-duty weld-on perch solution for 3" round axles. If you want to restore proper spring alignment and a secure mount for leaf springs with easy-to-measure dimensions and a full four-piece kit, this product delivers the core hardware needed for a professional repair or upgrade.