Garden & forestry
Speedy SPY-SG15 Stump Grinder
The Speedy SPY-SG15 is a small wheeled stump grinder with six cutter heads on a 254×75 mm cutting wheel, driven by a Loncin 252 cc/15 hp engine. Speedy lists a cutting reach of 300 mm below ground and 500 mm above ground, a net mass of 92 kg and a 950×800×610 mm packing case. It suits orchard renewal and land upkeep where stumps need grinding out one by one. Before quoting, tell Speedy the stump sizes, how far down they must go and how the machine reaches them, and ask for the cutter and engine build you will receive.
Wuyi Speedy Garden Machinery Co., Ltd. ↗
Build my procurement briefMatch the 300 mm reach to your stumps
Speedy publishes two vertical figures for the SG15. Your stumps and the finish you want decide whether they are enough, so describe both when you ask for a quote or a demo. Our guide to farm stump grinders and wood chippers explains cutting depth and safety points worth adding to that description.
| Question for your job | What the SG15 table gives |
|---|---|
| How deep | 300 mm below ground. Ask what surface the depth is measured from and how a ground-down stump and root area will be checked on handover. |
| How high | 500 mm above ground. Ask Speedy for the largest stump diameter it recommends and whether tall stumps should be cut down first. |
| Stump size and wood | Send stump height, diameter and wood condition with your enquiry so Speedy can match the machine to it. |
| Finished ground | Say whether you want only the visible stump removed or a set area cleared. Root extraction and replanting preparation are separate tasks. |
Sources [1]
Published specifications
Read each value with its stated conditions, and ask the manufacturer for any limit not listed here.
| Specification | Published value | Meaning / limit |
|---|---|---|
| Cutting assembly | 6 cutter heads; 254×75 mm wheel (diameter × thickness) [1] | Ask for cutter material, part numbers, wheel speed and swept width. |
| Cutting reach | 300 mm below ground; 500 mm above ground [1] | Depth and height the wheel reaches. Stump diameter and removal time are separate questions. |
| Engine | Loncin; 252 cc/15 hp [1] | Ask for the engine model and the standard the power figure is rated to. |
| Machine mass | 92 kg net [1] | Request gross packed mass and lifting instructions for unloading. |
| Packed dimensions | 950×800×610 mm [1] | Packing case size. Ask separately for assembled size and handle position. |
| Container loading | 54 units/40PH [1] | As printed by Speedy. Ask for the container type and loading plan for your quantity. |
Cutters, wheel and engine for servicing
The photograph and table show a compact wheeled grinder layout. For servicing you will need a parts drawing and a maintenance schedule from Speedy.
| Component | What to request |
|---|---|
| Cutting wheel | 254×75 mm, diameter by thickness. Ask for swept cutting width, wheel speed and the approved cutter layout. |
| Six cutter heads | Get part references, cutter material and replacement instructions, and buy matching teeth from Speedy. |
| Engine | Ask for the engine model and manual for the 252 cc/15 hp Loncin unit, and the power that reaches the cutter shaft. |
| Wear | Ask how many stumps a cutter set typically lasts and when to replace it, for wood like yours. |
Getting the SG15 to the stump and onto the truck
The 92 kg net mass and the 950×800×610 mm packing case are shipping figures. For moving between orchard rows you need the assembled size and the approved way to move the machine. If those rows also need mowing, Speedy makes the SPY-550 tracked remote mower.
Working size
Request assembled dimensions and handle position, then check them against gates, row spacing and the spot where the machine must work.
Moving between sites
Ask how the SG15 should be lifted and moved, whether it may be towed, and where the lifting points are.
Shipping weight
Get gross mass, pack contents and unloading requirements alongside the 92 kg net figure.
Container plan
Ask Speedy to explain the 40PH entry and the 54-unit loading figure with a packing and loading plan for your order.
Judge output on a real stump
Speedy gives no removal rate for the SG15, and engine power and reach cannot predict one. Pick a stump typical of your job, agree how far it must be removed, and have Speedy or a trained operator run the demonstration with the cutter and engine build you will buy, following the current manual.
Record how much was removed, how long it took and any stops. Look at cutter wear and the material left behind. Stumps per hour only means something next to the stump size, wood condition and finish behind it.
Speedy markets its machines for farm, forestry and estate work. Ask for SG15 references from orchard renewal or similar jobs if you have them in mind.
Stump grinding, branch chipping and root removal
The SG15 sits in Speedy's stump grinder category. Branch chippers are a separate category with their own feed and cutting data, so the 254 mm wheel diameter tells you nothing about branch intake. The 300 mm below-ground figure is cutting depth and has nothing to do with pulling roots.
If your project also produces pruned branches or needs whole roots out, treat those as separate jobs and quote a machine for each.
Buyer questions
Does 300 mm mean every root down to that depth is removed?
It is the below-ground cutting depth. Ask Speedy how a finished stump hole is checked and whether roots beyond the wheel's sweep remain. [1]
How many stumps per hour does the SG15 remove?
Speedy publishes no rate. Arrange a demo on a stump like yours with the build you will buy and time it. [1] [3]
Are 950×800×610 mm the working dimensions?
They are packing dimensions. Ask for assembled size and handle positions before checking gate and row access. [1]
Is 15 hp the power at the cutter?
It is printed with 252 cc in the engine row. Ask Speedy for the engine model, rating standard and cutter-shaft output in writing. [1]
Prepare a model-specific brief
Write your actual conditions below. This local worksheet is not sent, uploaded or saved after reload. Copy or print it before leaving.
Sources
Specifications come from the manufacturer's publications listed below, with the date each was checked.
- Official SPY-SG15 cutting and packing table
manufacturer · Checked 2026-10-12
Six cutters, Loncin 252cc/15hp engine, 254×75mm wheel, 300mm below and 500mm above ground, 92kg net, packed dimensions and container loading.
- Original SPY-SG15 photograph
manufacturer · Checked 2026-10-12
Shows the wheeled grinder layout and handle.
- Official Speedy application and company claims
manufacturer · Checked 2026-10-12
Speedy's stated uses across farm, forestry and estate maintenance, and its company testing and certification claims.
Report a correction through our contact form, quoting SPY-SG15 and the relevant specification.