--- product_id: 44913664 title: "One Aftermarket Add on Rotary Cutter Slip Clutch Easily Add a Slip Clutch to Your Splined PTO." brand: "generic" price: "VT36815" currency: VUV in_stock: true reviews_count: 8 category: "Generic" url: https://www.desertcart.vu/products/44913664-one-aftermarket-add-on-rotary-cutter-slip-clutch-easily-add store_origin: VU region: Vanuatu --- # Adjustable friction disc for 20-55 HP range 1-3/8" x 6 spline male & female ends Protects PTO & gearbox from overload damage One Aftermarket Add on Rotary Cutter Slip Clutch Easily Add a Slip Clutch to Your Splined PTO. **Brand:** generic **Price:** VT36815 **Availability:** ✅ In Stock ## Summary > 🛠️ Upgrade your PTO game — protect, adjust, and power through with confidence! ## Quick Answers - **What is this?** One Aftermarket Add on Rotary Cutter Slip Clutch Easily Add a Slip Clutch to Your Splined PTO. by generic - **How much does it cost?** VT36815 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/44913664-one-aftermarket-add-on-rotary-cutter-slip-clutch-easily-add) ## Best For - generic enthusiasts ## Why This Product - Trusted generic brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable Heavy-Duty Build:** Robust construction designed to withstand tough field conditions and extend equipment life. - • **Customizable Power Protection:** Adjust friction disc to match horsepower from 20 to 55 HP, safeguarding your tractor and equipment. - • **Precision Fit & Compatibility:** Standard 1-3/8" by 6 spline male & female ends ensure seamless integration with your PTO system. - • **Easy Installation & Maintenance:** Add a slip clutch without replacing the entire PTO shaft; adjustable springs and replaceable parts simplify upkeep. - • **Smooth Operation & Damage Prevention:** Slips on impact to prevent costly gearbox and shaft failures, giving you peace of mind during heavy-duty use. ## Overview This aftermarket adjustable slip clutch fits standard 1-3/8" by 6 spline PTO shafts, offering a customizable friction disc adjustable from 20 to 55 horsepower. Designed to protect tractors and equipment from overload damage, it installs easily without replacing the entire PTO shaft. Heavy-duty and durable, it ensures smoother operation and extends the lifespan of your rotary cutter or mower attachments. ## Description This listing is for one aftermarket independent adjustable slip clutch with a 1-3/8" by 6 spline male shaft and a 1-3/8" by 6 spline female end, Do you have a piece of equipment that is direct drive and wish it had a slip clutch to protect it or your tractor? Have you had to replace your gearbox or repair the PTO on your tractor because the direct drive PTO shaft between your tractor and equipment was overloaded and broke a shaft, damaged your gearbox or tractor? Have you found a good used mower, but it does not have a slip clutch and you wish is did? Are you running a piece of equipment designed for a lower horsepower tractor with a high horsepower tractor! Here is an easy way to add an adjustable slip clutch to your tractor or equipment without having to purchase a complete expensive PTO shaft! Just install this adjustable slip clutch directly on your tractor or implement, install your PTO onto the slip clutch, adjust the springs to match your protection needs and check to make sure that the PTO shaft has enough clearance as you slowly raise and lower your 3-point hitch with your tractors hydraulics and make sure the shaft doesn't bottom out causing the shaft to bend. If you need to shorten the shaft slightly to allow for proper clearance remove the shaft from the adjustable slip clutch, slide the two sides of the PTO apart and cut an equal amount off each side as needed, reinstall the PTO shaft to the adjustable clutch and recheck for necessary clearance. Now just adjust the slip clutch to match your horsepower requirements making sure to consider both the horsepower rating of the mower and tractor and adjust the overall length of the clutch springs to match the corresponding rating on the provided clutch adjustment table. If you have a rotary cutter with a 40hp gearbox and you have it mounted on a 30hp tractor you would want to set the clutch to slip at 30hp to protect the tractor as it has the lower horsepower rating of the two. If you set it to match the rotary cutters gearbox you could potentially damage the PTO drive shaft and components of the tractor, should you hit something hard enough. Desired Horsepower Rating / Overall Clutch Spring Length Adjustment:20hp - 28.50mm25hp - 28.25mm30hp - 28.00mm35hp - 27.50mm40hp - 27.00mm45hp - 26.50mm50hp - 26.00mm55hp - 25.50mm Specifications1-3/8" by 6 Spline Female End (Standard 540)1-3/8" by 6 Spline Male End (Standard 540) Adjustable / Replaceable Friction Disc Adjustment Range from 20 - 55 Horsepower We sell a complete line of replacement PTO shafts and parts. If you don't see the parts, you need listed, please contact us we would love to earn your business. We are listing new items frequently so please check our store often. Replaces Part Numbers: ISC-SP-SP. Review: Works Great - I’ve been using this for about two years now between my tractor PTO spindle and brush cutter driveshaft. with the nuts flush with the ends of the bolts it was a little bit tight at first (but still gave way before breaking the shear bolt on stumps etc.), but now it’s just about perfect, giving me a smoother start on the brush cutter and slipping when I hit so much as a hard piece of wood or something. Even if this one breaks, I’ll definitely buy another one just like it. Review: Heavy, good quality - Heavy duty clutch. Seems well made for a good price. Torque spec sheet was not included, but I contacted the seller,& they emailed a copy right away. ## Features - This listing is for one aftermarket independent adjustable slip clutch with a 1-3/8" by 6 spline male shaft and a 1-3/8" by 6 spline female end. - Specifications1-3/8" by 6 Spline Female End (Standard 540)1-3/8" by 6 Spline Male End (Standard 540) Adjustable / Replaceable Friction Disc Adjustment Range from 20 - 55 Horsepower. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01L9UZOVO | | Best Sellers Rank | #642,358 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,379 in Lawn Mower Clutches | | Date First Available | August 30, 2016 | | Is Discontinued By Manufacturer | No | | Item Weight | 19 pounds | | Manufacturer | Brooks AG Parts | | Package Dimensions | 8 x 8 x 8 inches | ## Images ![One Aftermarket Add on Rotary Cutter Slip Clutch Easily Add a Slip Clutch to Your Splined PTO. - Image 1](https://m.media-amazon.com/images/I/41EcBv9bikL.jpg) ## Questions & Answers **Q: I need a 21 spline shaft** A: I am sorry our supplier currently does not offer a 21 spline unit, I have requested that they build us a few which we may have mid summer this year! **Q: What is the diameter?** A: This clutch measures just over 7" is diameter. Thank you **Q: Won't fit inside the shield of my kubota b2601 pto. do you make one that's about 2" smaller in diameter? or where might i find one?** A: I am sorry but I am not aware of any units that have a smaller diameter. These clutches can also be placed directly on the implement gearbox which might provide more clearance for it's size. The clutch is designed to work in either direction. **Q: what is the dimension from the end of the female shaft to the center of the hole where the bolt connects to the tractor pto** A: looks to be about 5-1/4" from center hole to center hole Thank you, ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works Great *by D***. on May 17, 2022* I’ve been using this for about two years now between my tractor PTO spindle and brush cutter driveshaft. with the nuts flush with the ends of the bolts it was a little bit tight at first (but still gave way before breaking the shear bolt on stumps etc.), but now it’s just about perfect, giving me a smoother start on the brush cutter and slipping when I hit so much as a hard piece of wood or something. Even if this one breaks, I’ll definitely buy another one just like it. ### ⭐⭐⭐⭐⭐ Heavy, good quality *by W***Z on August 27, 2021* Heavy duty clutch. Seems well made for a good price. Torque spec sheet was not included, but I contacted the seller,& they emailed a copy right away. ### ⭐⭐⭐⭐ Functional *by M***Y on February 25, 2024* Functions as it should. Took a bit of time to dial it in, there aren’t any instructions, so it’s just guess and check. But it works well now. I’m still running a shear bolt as a safety measure, but haven’t broken one since I got this clutch dialed in. There is a bit of surface rust showing up. Would be nicer if the steel were a little more corrosion resistant. But that’s what grease is for. Can’t really complain for the price. ## Frequently Bought Together - One Aftermarket Add on Rotary Cutter Slip Clutch Easily Add a Slip Clutch to Your Splined PTO. - Grade 2 Shear Bolts for Rotary Cutters 1/2" x 3-1/2" with Nylock Nuts - 5 Pack - VEVOR PTO Shaft, 1-3/8" PTO Drive Shaft, 6 Spline Tractor, Round Implement Ends PTO Driveline Shaft, Series 4 Tractor PTO Shaft, 43"-61" Brush Hog PTO Shaft Black, for Finish Mower, Rotary Cutter --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/44913664-one-aftermarket-add-on-rotary-cutter-slip-clutch-easily-add](https://www.desertcart.vu/products/44913664-one-aftermarket-add-on-rotary-cutter-slip-clutch-easily-add) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-19*