Description

When your coupling starts making noise or you feel vibration that wasn’t there before, it’s usually the spider wearing out. This little rubber piece is what does the heavy lifting between your drive and driven shafts, absorbing shock and compensating for slight misalignment. When it goes bad, you’ll know—and you’ll want to get it swapped out before it leaves you stuck in the field.

What You’re Getting

Buna-N rubber construction that stands up to oil, grease, and farm chemicals
Handles angular misalignment up to 1 degree and parallel misalignment up to 0.015 inches—real-world tolerances for field equipment
Works in temperatures from -40° to +212°F, so it won’t crack in winter or get soft in summer heat
Direct replacement that slips right into the center of your L50 coupling bodies

Built for Real Farm Work

This spider fits Lovejoy L50 series flexible jaw couplings, which you’ll find on all kinds of agricultural and industrial equipment. These couplings connect PTO shafts to implements, drive pumps and generators, and link motors to gearboxes on everything from grain elevators to manure spreaders. If you’ve got rotating equipment that needs to handle some misalignment while transferring power, there’s probably a Lovejoy coupling in there somewhere.

Made to Last

The Buna-N rubber is specifically chosen because it holds up to the oils and chemicals you encounter around farm equipment. It stays flexible through temperature swings and resists cracking from UV exposure. This isn’t the cheap stuff that gets hard and brittle after a season—it’s designed to keep doing its job year after year.

Installation Notes

Replacing the spider is straightforward—just separate the coupling halves and pop out the old one. The new spider should fit snugly between the jaw teeth. If the old one was really chewed up, take a look at your alignment while you’ve got things apart. A little extra care during installation will help the new spider last longer.