Skip Content

Want to pay an invoice? Please call us at 1-800-GRAINGER (1-800-472-4643).



  • Item# 8RLJ4
  • Mfr. Model# FM500
  • Catalog Page# N/A
  • UNSPSC# 30172001
close x

Using 360° Viewing:

  1. Rotate: Use top-to-bottom, side-to-side by use of mouse arrow.
  2. Zoom In: Double click on image.
  3. Zoom Out/Reset: Put photo at full zoom & then double click.
Megaphone How can we improve our Product Images?

Price $762.00 / each

Activate Now

to save with

Select AdvantageSM

Please sign in or register to access lists

Please sign in or register to access Quote

Jump to:
  • Shipping Weight 33.0 lbs.
Country of Origin China Country of Origin is subject to change.
Note: Product availability is real-time updated and adjusted continuously. The product will be reserved for you when you complete your order. More

Technical Specs

  • Item Swing Gate Opener
  • Type Single Gate, Medium to Heavy Duty
  • Voltage 12VDC Rechargeable Battery
  • Operation Control Board Programmable for Pull-to-Open or Push-to-Open
  • Cycle 20 Seconds to Open
  • Max. Capacity 18 ft. Gate, 850 lb.
  • Safety Features Soft Start/Soft Stop, Adustable Obstruction Sensing, Auto Close
  • Standards UL325
  • For Use With 8DFT6, 9PXY6, 8DFT4, 8DFT3, 8DFT5, 29PF94, 8UUU2, 8XE31
  • Includes Gate Operator, Battery Backup, Radio Receiver, Entry Transmitter, AC Transformer, Mounting Hardware
Megaphone How can we improve our Technical Specifications?

Compliance and Restrictions


Alternate Products

Alternate Products may not be identical in style or function to original selection. Please compare below for more information.

Alternate Search Terms

Customer Reviews

Rated 4.8 out of 5 by 27reviewers.
Rated 5 out of 5 by Very good equipment 8/9/16The installation was a bit tricky but the unit is installed ... and works very well. I would recommend this product. August 9, 2016
Rated 5 out of 5 by Love it First one lasted 7 years. Had to replace arm. EASY August 1, 2016
Rated 1 out of 5 by None I have bought 3 of the Mighty Mule 500 in the last 4 years and now I will never ever buy another Mighty Mule again. I am going to pay the extra money and get the Apollo brand. Its time to try something else April 17, 2016
Rated 5 out of 5 by The new circuit board is easy to understand. This circuit board is user friendly. No need for a separate board for the lock. No need to flip switches for the auto close duration. Easy to read. May 24, 2015
Rated 5 out of 5 by gate performs............. installed 3 weeks ago........has worked as advertised...........very pleased.......replaced 15 year old system that was NOT mighty mule. March 4, 2015
Rated 5 out of 5 by Easy to install, does the job After struggling with which gate opener to purchase, I finally came back to the Mighty Mule FM500 and purchased it. It was easy to install and is working as promised. Time will tell if it holds out. So far so good! January 3, 2015
Rated 5 out of 5 by Easy to install, works great I have a 13' steel gate that's trimmed out in bamboo and some redwood. It's not that heavy, maybe 200 lbs. The FM500 has more than enough power and pretty good speed of opening. This is a nice product it works great. October 20, 2014
Rated 5 out of 5 by GREAT SERVICE!!! Simple to order, fast shipping, plus a free bonus part!!! What more could I have asked for!!!!! June 6, 2014
  • 2016-09-28 T18:52:34.374-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_27, tr_27
  • loc_en_US, sid_8RLJ4, prod, sort_default

Product Reviews Disclaimer:
Grainger is neither responsible for, nor does it endorse, the content of any product review or statement posted. Any statements posted constitute the statements of the poster and are not the statements of Grainger. The statements posted by Grainger employees with the Grainger employee badge represent the views of such employees and are not the statements of Grainger. Grainger makes no representations as to the appropriateness, accuracy, completeness, correctness, currentness, suitability, or validity of any product review or statements posted, including those posted by employees with the Grainger employee badge, and is not liable for any losses, injuries or damages which may result from any such product review or statements. Use of any linked web site provided in a product review or post is at the user's own risk.