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Description
The Forestwest BM689 Walk Behind Trencher is a powerful petrol chain trencher designed for digging narrow, consistent trenches for irrigation, drainage, electrical conduit, cable laying, pipe installation and landscaping work.
Powered by a 15HP 420cc RATO 4-stroke petrol engine, the BM689 provides adjustable trenching from 0–600mm deep with a 100mm trench width. Its heavy-duty digging chain uses 27 replaceable carbide alloy blades to cut through suitable soil efficiently while reducing the physical effort and time required compared with manual trench digging.
With a maximum chain speed of 550m/min and a stated trenching capacity of up to 60 metres per hour under suitable ground conditions, the BM689 is designed for efficient trenching across residential, landscaping, farming and construction applications. Its compact 720mm wheel width also allows access through many gates and tighter work areas where larger excavation equipment may be impractical.
Assembly:
Key Features & Benefits
- 600mm Adjustable Trenching Depth: Dig from 0 to 600mm deep to suit different irrigation, conduit, drainage and pipe installation requirements.
- 100mm Trench Width: Produces a consistent narrow trench suitable for many underground services and landscaping applications.
- 15HP RATO Petrol Engine: 420cc 4-stroke engine provides strong petrol-powered performance for demanding trenching work.
- 27 Replaceable Carbide Alloy Blades: Mining-grade carbide cutting teeth provide durable cutting performance and can be replaced individually when worn.
- 550m/min Maximum Chain Speed: High chain speed supports efficient soil cutting and material removal.
- Up to 60m/h Trenching Capacity: Designed for efficient trench production under suitable soil and operating conditions.
- Centrifugal Clutch: Provides smooth engagement of the digging chain as engine speed increases.
- Handlebar-Mounted Controls: Throttle, stop control, emergency stop and handle wheel lock are positioned for convenient operator access.
- Compact 720mm Wheel Width: Allows the machine to access many gates, side passages and restricted work areas where larger trenching equipment may not fit.
- Height-Adjustable Handle: Allows the operator position to be adjusted while also helping reduce storage space when required.
- Manual Drive System: Provides straightforward walk-behind control during trenching operations.
The BM689 is suitable for creating trenches for irrigation systems, electrical conduit, underground cables, drainage lines, water pipes and landscaping projects. Its narrow 100mm cutting width helps minimise unnecessary excavation compared with wider digging equipment.
Specifications
| Model | 600mm 15hp Walk Behind Trencher BM689 |
| Engine Power | 15hp Recoil start |
| Drive Mechanism | Manual |
| Trench Width | 100mm |
| Trench Depth | 0-600mm adjustable |
| Trench Capacity | Up to 60 meters per hour |
| Blade Number | 27 pcs Carbide Alloy Blades |
| Chain Length | 2000mm |
| Chain Speed (Max.) | 550m/min |
| Overall Size (L × W × H) | 2080 × 720(Wheel) / 900(Guard) × 1320mm |
| Packing Size (L × W × H) | 1140 × 740 × 850mm |
| Net / Gross Weight | 180 / 195kg |
Frequently Asked Questions
1. How deep can the BM689 trencher dig?
The BM689 has an adjustable trenching depth from 0 to 600mm.
2. How wide is the trench?
The BM689 cuts a trench approximately 100mm wide.
3. What can the BM689 be used for?
It is suitable for trenching applications such as irrigation lines, electrical conduit, underground cables, drainage, water pipes and landscaping projects.
4. How fast can the BM689 trench?
The stated trenching capacity is up to 60 metres per hour under suitable ground and operating conditions. Actual productivity will vary depending on soil type, trench depth and site conditions.
5. What type of cutting teeth does it use?
The digging chain uses 27 replaceable carbide alloy blades designed for durable trenching performance.
6. What engine does the BM689 use?
The BM689 is powered by a 15HP 420cc RATO 4-stroke petrol engine with recoil start.
7. Can it fit through a standard gate?
The wheel width is approximately 720mm, allowing access through many residential gates and side passages. Always measure the actual access point before moving the machine through a restricted area.
8. Is a walk behind trencher the same as a trench digger?
Yes. Walk behind trencher, chain trencher, trench digger and ditch digger are commonly used terms for machines designed to cut narrow trenches into the ground.
9. Are the carbide blades replaceable?
Yes. The BM689 uses individually replaceable carbide alloy cutting blades.
10. Is the BM689 self-propelled?
No. The current specification lists the drive mechanism as manual.
