Gobbler Gate Calculator
Stilt Pro Equipment Top Hopper Gobbler · Fertilizer Topdresser

Gate Height Calculator

Instructions to calibrate fertilizer output for the Top Hopper.

Top Hopper Gobbler fertilizer topdresser, isometric line drawing showing the hopper, spreader drum, and gate
1

Choose whether you'll control by Motor Speed or by Gate Position.

2

Enter your target fertilizer rate and product density from the bag label.

3

Enter your Gobbler output rate — yards of material moved per hour.

4

Enter the speed dial position or gate height you're starting from.

5

Read the matching value on the right, then set your machine to match.

Application Job

Example job pre-filled below — replace with your own numbers.

6.0
0 (stopped) to 10 (maximum drum speed) — gate height will be calculated to match
lbs / yd
Target application rate for this product
lbs / ft³
Loose bulk density of the product being spread
yd / hr
Yards of material this Gobbler moves per hour of travel
Set gate height to
1.03in

Measured from the hopper floor to the bottom edge of the gate

Requested rate exceeds the gate's maximum opening. Lower the speed position or Gobbler output rate.
Machine specifications

Fixed to this Gobbler's drive and hopper geometry. Only change these if your unit differs from standard.

RPM
:1
in
in
in
Calculation detail

The full chain from speed dial to gate height, for anyone who wants to check the math.

Stilt Pro · Top Hopper Gobbler reference tool. Confirm the gate height on your machine before operating, and re-check whenever you change product, speed position, or ground speed.

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What does the warranty look like?

3 Year, Unlimited Hours Warranty – INCLUDED

What does it include?

Includes: Problem identification, remote trouble shooting of issue, support and instruction for proper repair, and providing replacement of failed parts.

What is excluded?

Excludes – Misuse of equipment (including using non horticultural potting mixes with high sand and field soil content) or improper care, such as leaving fertilizer in machine for an extended period of time.  Wear parts (chain, slats, wear plates or surfaces).  External physical damage inflicted on the machine.  Labor repair costs.

We will walk you through the repair process and make sure you're happy.

What about Service Parts?

Yes, we keep inventory of most all parts. Most all of the components are either US Sourced or a common off the shelf component. We are having some supply chain issues on components, but we are working through the best way to manage that.

What about Repair?

All of our machines are designed right here in the US.  We design these machines to be easily repairable by an inexperienced worker.  Should a problem arise, you won’t need to weld or fabricate a new part.  The entire machine is bolted together and you can simply bolt in a replacement part.

The hopper capacity seems low

We have heard that concern, I get it, you won’t be able to load a machine up and let a person pot plants for a day.

Some perspective – The rear load machine holds about 3/4 – 1 cubic yard which is up to about 200 gallons of material. That gives you about 15 minutes of runtime without stopping.

The reason for the smaller equipment size is to primarily keep the price and complexity down.

Increasing the machine size has a few unwelcome side effects:

-Increase horsepower requirements which means increased power – now you have to have dedicated power for the machine.

-Increasing the hopper size also increases the physical size of the machine which increases the overall cost and reduces portability

You may have not made a purchase on a potting machine in the past because of the overall cost.

We're being cautious around those concerns and trying to work within your business goals.

Is this production rate slow?

From time to time, we hear that our production rates appear slow. Look at it this way though. You have 5 or 10 workers running a high-speed line. SOMETHING GOES WRONG, you now have all these people standing around and/or you need to find a different job for them.

What's your real per man hour potting rate?

If you have a machine problem with a high-speed line you’re completely shut down.  With a cell-based design, you have a small part of the potting operation down.  Your efficiency is similar whether you have 1 or 4 people operating STILT.PRO machines.

Your business is complex, don't make it worse.

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