What Are the Advantages of Heavy duty brush cutter gearbox？

I've spent this week looking at my local options for a shredder, as well as learning more about some of the ones I can buy and have shipped to me (especially the Tennessee River Implements cutters, as the price is quite nice).

Heavy duty to one person is medium to another
My father in law suggested I get a 6' heavy duty shredder. He was comparing it to his 5' heavy duty shredder. Most have said that a 6' heavy duty shredder is too my for my L with 29-30 PTO HP.

Turns out, after many more questions, he was primarily referring to the gearbox, that he's seen many people blow the gearboxes on those, especially ones bought at Tractor Supply, etc. His example of a good shredder was his Bush Hog Squealer SQ160. He says the gearbox is better, and the round design, with the top having less areas for water to pool, and hold grass are highly desirable. I ran his 5' Bush Hog behind my LDT, and it ran very well, with barely a slowdown, except in the thickest of the blue stem you can find on his property. Additionally, it cut through smaller mesquite trees with ease, which is something desireable at my place.

I find that his Bush Hog has the same deck thickness as the TRI medium duty cutters.

Gearbox Sizing isn't precise

I find that gearbox HP requirements aren't well explained by the manufacturers, and I find posts that say you can go with the bigger gearbox and it just gives you more leeway, but some manufacturers (like Bush Hog) list a HP range (with a minimum). The Bush Hog Squealer 172 (since I have a comparison with my father in law's 160) lists a range of 30-45 PTO HP. That seems like it is very much borderline, with the listed specs on my L showing either 29 or 30 PTO HP (I don't know what gear early versus late means, so I go with the late one. I guessed late meant at the PTO shaft on the back of the tractor).

Factors that are truly important

What you are cutting

If it's just pasture land, with nothing big, there is less risk of you bogging the engine. Cutting through thick, wet grass taxes it more. It seems to me that this is more a function of the size of the bite you are taking, on a 5' cutter, you are biting off less than a 6' cutter. I would assume the gearbox has no bearing here, unless you are undersized. So, for me, it seems that if I can get away with a 6' cutter with the output of my tractor, I'd like to go this way.

How heavy the cutter is

Primarily, this seems to affect the ability for you to lift the cutter. The TRI 6' cutter with the 45 HP gearbox has a listed weight of 708 lbs, and if you upgrade to the 90 HP gearbox, it adds 60 lbs. From this alone, I would opt for the cost of the 90 HP gearbox, because it feels like with me mowing with the FEL, the 60 pounds wouldn't be a problem. Tractordata says my tractor can lift at least pounds (without my understanding the difference between the two specifications listed, I picked the minimum). Given that, I assume it's only a matter of whether my front tires are going to come off the ground, so again, I doubt that 60 pounds is going to be the metaphorical straw that broke the camel's back, but I could be wrong. Current bush hog models (BH16) seem to weigh similar to that of TRI.

Matching the gearbox to the tractor size

This one as I mentioned above seems to have some voodoo involved. Nobody lists a minimum HP for the gearbox, but I would imagine having a heavier duty gearbox implies potentially more HP loss than a smaller model. Can I pick up the TRI model with a 90HP gearbox to attempt to future proof my purchase, and work with a bigger tractor later?

Other niceties

I find that the Bush Hog and Land Pride models have a rounded shape, and less channels for water/wet grass to get stuck on, reducing the likelihood of it rusting out. My father in law's old cutter had the deck rust out due to it collecting debris and not properly cleaned. I'm aware that if you are very good with taking care of it, it should not be a problem, but sometimes life intervenes, and it seems like a great feature.

Ability to get parts? I have dealers for Bush Hog as well as Land Pride around, so it seems relatively easy to get parts. If I pick a model not sold locally, parts may be less available.

My ultimate factors
I want the biggest shredder that I can get (seems like 6'), with the best gearbox and body design, to last me for the long haul, even if I spend a bit more money up front. Given that, I need it to work behind my Kubota L, or it's worthless.

I checked pricing on the Land Pride RCF locally, and was quoted $ (which turns into $ with tax). If I compare that to comparable pricing for a TRI cutter shipped to my property, I'm spending around $ less. I can see only the two main benefits, rounded design, and locally available parts. I'm tempted to save the $ and understand that the deck needs to be taken care of. At the moment, I can store the tractor in the barn, but I believe the shredder will stick out, so I have to assume it's going to see some rainfall.

Does anybody see anything wrong with my reasoning, after reading more threads, having seat time behind a 5' cutter, and getting pricing and options from local and online sellers?

Last but not least, I recorded some video of what I encounter on the property (I only have video from right now, with the grass not fully grown into summer, but it's still representative).

Thanks!

Mark

Standard Duty

For more information, please visit our website.

Brush Cutter

Attachment

The Standard Duty Brush Cutter has an open front mowing deck or mesh grill front, and features 2 blades with a 40 HP gear box and stump jumper. Quality built for basic land and grass clearing.

X-Treme Duty

Brush Cutter

Attachment

Our Extreme Brush Cutter is ideal for tough clearing. Equipped with 100hp Omni gear box. 3/4 Blades, Mulching Teeth Optional.

Severe Duty

Brush Cutter

Bent Axis Piston Motor

Our Severe Duty Bent Axis Piston Cutter is powered by a Parker bent axis piston motor. With a continuous cutting capacity of 10″, you will be able to make quick work of all brush cutting needs.

Heavy Duty

Brush Cutter

Attachment

Our Heavy Duty Brush Cutter is made for the person who needs to clear a lot of acreage of undergrowth land and small trees.

X-Treme

Brush Cutter

Piston Motor

Our Piston Motor Brush Cutter is powered by a Parker direct drive piston motor. With a continuous cutting capacity of 7″, you will be able to make quick work of all brush cutting needs.

Forestry

Disc Mulcher 44"

Attachment

This is the meanest, biggest, baddest tree and brush chewing machine we offer. The 44" and 60" Disc Mulcher is available in two powerful motor options, can mulch 4" materials in seconds, and cuts 8" diameter trees with ease.

Forestry

Disk Mulcher 60"

Attachment

This is the meanest, biggest, baddest tree and brush chewing machine we offer. The 60" Disc Mulcher is available in two powerful motor options, can mulch 6" materials in seconds, and cuts 14" diameter trees with ease.

Skid Steer

Stump Grinder

You will get efficient and thoughtful service from GTM.

Attachment

The stump grinder is a perfect attachment for removing stumps. They come standard with high-quality, dependable parts. Truly Best-In-Class!

Piston Motor

Swing Boom Brush Cutter

Attachment

The Skid Steer Piston Motor Swing Boom Cutter features our most powerful motor, designed for cutting brush on banks, fence lines, trails, and roads with extended reach.

CID

Swing Boom Brush Cutter

Attachment

The Standard Skid Steer Swing Boom Brush Cutter offers great cutting and clearing advantages over a typical brush cutter. Increase your cutting and reach!

X-Treme Duty

Tree Reaper

Piston Motor

The CID X-treme Tree Reaper combines strength and efficiency. This machine is by far one of our favorite attachments and for good reason!

Rotating

Tree Saw

Attachment

Upgrade from a chain saw to our tree saw! From Land Management, to de-limbing up high... it's a must have. Teeth are replacable, pushing bar standard, cuts up to 18" vertically or horizontally!

Fixed

Tree Saw

Attachment

Upgrade from a chain saw to our tree saw! From Land Management, to de-limbing up high... it's a must have. Teeth are replacable, pushing bar standard, cuts up to 18" horizontally!

Rotating

Tree Shear

Hydraulic or Manual

Imagine a chain saw that cut with 40 tons of shearing force. Ours does! The Rotating Tree Shear features a 1" thick blade that cuts trees and logs up to 12" in diameter. Proven Shear technology drops trees to the Right!

Non-Rotating

Tree Shear

Attachment

Imagine a chain saw that cut with 40 tons of shearing force. Ours does! The Fixed Tree Shear features a 1" thick blade that cuts trees and logs up to 12" in diameter. Proven shear technology drops trees to the Right!

If you are looking for more details, kindly visit Heavy duty brush cutter gearbox.