Demands from clients have often contradicted with engineering possibilities. However, Shibuya has made every effort to knuckle down to achieve them.
The keyword is “NO COMPROMISE” believing that we can overcome the difficulties without sacrificing anything.
High Durability With Light Weight
Utilizing advanced molding technology, pressurized die-casting and plastic injection reduced external parts’ weight.
To reduce the weight inside the gearbox, holes are drilled in every possible gear, the slip discs for the clutch are relocated at the recess of a gear, and the spindle shaft has hollow structure.
All these weight reductions can be achieved without sacrificing any durability. 40 years of experience in making diamond core drilling machines has made all these possible.
This leads to the development of a new type of column called the Hybrid Column :
Outer Layer made of steel, inner layer made of aluminium
Steel has high durability against wear, metal guide rollers can be used for the carriage. Metal guide rollers offer more rigidity than plastic rollers or plastic sliding plates.
Steel has also decrease the oscillation caused by vibration from the core bit.
Aluminium inner core has increased strength, stability and at the same time reduce weight.
High Power From Small Sized Motor
Many have asked us, why is Shibuya Core Drill Machine use low power, does it have what it takes to do a proper coring works?
The concept of power is often misunderstood. It is often assumed that the value of rated input power is the actual power produced. But is totally wrong. The amount of torque at the spindle is the most important.
In order to get more spindle torque, both the friction and moments of inertia are created through the weight of the moving parts.
In the new concept of drill motors, the reduction in weight of cooling fan and gearwheels has raised the revolution speed of armature. This allow us to increase the reduction ratio.
The torque of Shibuya machine with 1500W is much more than China Machine with 3300W or even higher!
Low power also ensures motor will operate efficiently on all site and domestic power supplies. The surplus power is used as a safety margin to extend the life of armature.
That is why if Shibuya machine is taken care well, the armature and coil can be used for a long time.
Less Noise With High Cooling Capacity
The noise level achieved with these models is 84db(A) at no load. At this level, the cutting sounds from the core-bit will often exceed the sounds of the motor.
Not only has the noise level been reduced, the actual tone of the motor is also tuned.
In order to achieve 84db(A) with ‘No compromise’ to the cooling capacity, a new design plastic cooling fan is used and the opening for the air inlet is enlarged.
Advanced plastic injection technology has made it possible to design the inside of the motor enclosure to direct all available air to the components that must be kept cool.
All gears used are helical to add strength and to minimize gear noise.
Well known competitor Core Drill Machine has noise level of 105db(A). A difference of 20db means four times louder.
You have a choice to choose between angle stand or fixed stand:Rotate the core drill on its base up to 45 degrees angled drilling. Gain precise control of the angle with the built-in angle gauge on the base secure the column at the desired angle with a simple turn of a wrench
The motor ventilation system is designed to prevent water from flowing inside the motor with effective air cooling capacity
The circuit protector is conveniently located on the drill and features motor overload protection.
Move the feed handle on right or left side with ease to accommodate different working conditions. No tools necessary.
PRCD cuts off the electricity when it detects electric leakage.
Water Inlet Valve
The water inlet valve swivels 360 degrees to allow easy water hose connection even in the tightest work places
The motor’s carriage block runs on durable steel rollers as opposed to the friction plates used in the old models. Reduce drag, abrasion and wear on the carriage block and column while benefiting from smoother feeds and higher rigidity.