PORTABLE LINE BORING MACHINE The DIG-DOG Portable Boring Machine is an innovative and highly efficient piece of portable processing equipment, specifically engineered for the on-site maintenance of construction machinery. This versatile machine excels in the precise processing of small pipe inner holes and concentric spacing holes. It has become indispensable in the on-site maintenance of construction machinery such as excavators, cranes, and loaders, significantly reducing equipment maintenance costs while enhancing operational efficiency.
Main Application: The machine is designed to machine revolving holes, articulated holes, and shaft pin holes on various engineering machinery structures after repair welding or to install hole sleeves after reaming. It is adept at repairing and processing concentric holes, ensuring one-time positioning processing of porous on excavators, loaders, presses, cranes, and more, thereby guaranteeing the coaxiality of these structures.
TYPE |
BM-40 |
BM-50 |
BWM-50S |
BWM-50P |
BM-60 |
BM-60S |
Main motor |
1.5KW Brushless DC |
1.5KW Brushless DC |
3KW Vertical servo |
3KW Vertical servo |
2KW DC servo |
2KW DC servo |
Power of cutter moving motor |
120W |
120W |
120W |
120W |
120W |
120W |
Main motor output speed |
125r/min |
125r/min |
0-300r/min |
0-300r/min |
100r/min |
80r/min |
Motor speed control |
CVT |
CVT |
CVT |
CVT |
CVT |
CVT |
Feed way |
Tiptronic |
Tiptronic |
Tiptronic |
Tiptronic |
Tiptronic |
Tiptronic |
The boring bar diameter |
40mm |
50mm |
50mm |
50mm |
60mm |
60mm |
Scope of boring |
45-200mm |
55mm-260mm |
55mm-260mm |
55mm-260mm |
65--500mm |
65-500mm |
Feed stroke |
380mm |
380mm |
200mm |
200mm |
420mm |
740mm |
Maximum cutting capacity on one side |
2-3mm |
2-3mm |
3mm |
2mm |
2-3mm |
2-3mm |
Machining roundness |
0.03mm |
0.03mm |
0.02mm |
0.03mm |
0.03mm |
0.05mm |
roughness |
3.2um |
3.2 |
3.2 |
3.2 |
3.2um |
3.2um |
Installation |
Weld |
Weld |
Weld |
Weld |
Weld |
Weld |
Hole range |
* |
* |
55-230mm |
55-230mm |
* |
* |
Single side welding thickness |
* |
* |
3-4mm |
2-3mm |
* |
* |
Wire type |
* |
* |
1.0 |
1.0 |
* |
* |


What size of line boring machine should I choose?
There are various sizes of line boring machines available. Since no single machine can accurately cover all diameters, it's crucial to consider the specific types of jobs you intend to perform.
What boring bar length should I specify?
With numerous bar lengths available, your choice should be based on your job requirements. Keep in mind that for small diameter boring bars, longer lengths increase the risk of sagging.
What are the lead times for line boring machine?
Lead times vary depending on the machine size and stock availability. It's advisable to plan ahead, as it may take several weeks from the time of payment to receive your machine. Each machine package is custom-made from a range of options, contributing to the extended lead time.
Can DIG-DOG supply a machine in my area?
Yes, our portable boring machines are exported worldwide.
What maintenance is needed?
With proper care, the line boring machine will offer years of trouble-free use, consistently delivering accurate results. Routine maintenance involves simple cleaning, debris removal, and oiling.

