verifying... Contact Account Cart Home Rotary Mower Parts & Gearboxes 40 HP Gearbox RW-300, Smooth 1-3/8" Input Shaft The average rating for this product is 5 out of 5 stars 3 reviews With a rated horsepower capacity of 40, this gearbox will provide an excellent operation to your rotary cutter. It has a smooth input shaft that measures 1-3/8 inches. This rotary gearbox may be used with 4 foot, 5 foot, and 6 foot rotary cutters. Quantity Add to Cart Availability: #87854 Product Overview Gearboxes work to administer a transfer of speed and torque through their internal gear rotation, helping the overall performance of your rotary cutter. This RW-300 gearbox operates at 40 HP. The housing is constructed from durable ductile iron and the smooth input shaft measures 1-3/8 inches. It has a beveled type of gear, with the gear ratio measuring 1:1.47. Designed for use with 4 foot, 5 foot, and 6 foot rotary cutters, this rotary cutter gearbox has 4 bolt holes measuring 5/8 inch on a 6-3/4 inch bolt circle for installment. Specifications Fits many brands of mowers Gearbox RW-300 Horsepower: 40 Max RPM 540 Turns both clockwise or counterclockwise For 4 ft., 5 ft., and 6 ft. rotary cutters Come with the castellated nut and the carrier hub for the stump jumper (if needed) Housing construction: Ductile iron Mounting Base Thickness is 3/8 inch Mounting Holes are 3/4 inch diameter 9 inches tall Distance between mounting holes is 4-3/4 inch Smooth input shaft: 1-3/8 in diameter X 3-7/8 inches long Output shaft 1-1/2 inch diameter X 12 Spline being 4-1/2 inch length Spline length is 2-5/8 inches Gear ratio: 1:1.47 Gear type: Bevel gear Bolt pattern: (4) 5/8 inch diameter holes on a 6-3/4 inch bolt circle Uses 90 Weight Gear Oil (Not included) The input shaft snap ring comes with this and is located in the plastic tube attached to the shaft For castle nut use ASC # 102241 - 1" Castle Nut For output shaft gearbox seal RW300 use # 89757 For input shaft gearbox seal RW300 use #89756 Check out our selection of Rotary Mower Parts & Gearboxes Shipping & Return Info Shop More Rotary Mower Parts & Gearboxes Farm Machinery Parts Customers Who Viewed This Also Viewed Previous Pulley Spindle for Finishing Mower, 650M #84097 Add to Cart PTO Shaft, Series 4, 1-3/8" x 6 Spline and 1-3/8" Smooth Round Yokes #89367 Add to Cart Rotary Mower Blade Pan, 12 Spline The average rating for this product is 5 out of 5 stars #89742 Add to Cart BB-55K Blade Bolt Complete Kit Add to Cart Next Product Review Summary Based on 3 reviews The average rating for this product is 5 out of 5 stars Overall Rating: 5.0/5.0 Leave a Review Customer Reviews October 20, 2020 5' King Kutter This shopper rated the product 5 out of 5 stars This replacement gearbox worked perfectly on my bush hog. PirateKevinNC from NC May 23, 2019 gearbox rw-300 This shopper rated the product 5 out of 5 stars received it today.installed it on 5 ft. brush hog works great. great price. Works great. Thank you. Elton Kramer from OR August 01, 2017 Great Replacement This shopper rated the product 5 out of 5 stars Gearbox fit my older Pittsburgh Field General perfect. Box came with new output castle nut which wasnt clear in the description. Dont forget to fill it with 90 weight oil before you run it. J. Duffy from SC Don't Miss Out! Keep up on our always evolving product features, events, content and so much more. Enter your email address and subscribe to our series of e-newsletters and information. Sign Up Today! Agri Supply on Facebook Agri Supply on Instagram Agri Supply on YouTube Information About Agri Supply® Customer Service ASC Gift Cards Printable Order Form Track Your Shipment My Account FAQs Contact Us More Information View Online Catalog Request a Catalog Career Opportunities Recall Notice Accessibility Statement Email Privacy Policy Privacy Policy Terms of Use Store Locations Garner, NC Greenville, NC Lumberton, NC Monroe, NC Florence, SC Petersburg, VA Statesboro, GA Tifton, GA Valdosta, GA Agri Supply® and Agri-Direct® Copyright © 1962 - 2021. All Rights Reserved. Powered by KalioCommerce™