HULTDINS grapple saws
HULTDINS is the market leader for grapple saws and offers a variety of models for different applications:
Grapple saws for the timber harvest
A grapple saw on the skidder can make harvesting hardwood a great deal easier. The trees are felled by forestry workers and the trunks separated at the line for industrial timber. The skidder collects the unfinished stems and uses the grapple saw to separate the ranges on the skidder trail or log pile. Working with the grapple saw is particularly efficient in strong hardwood when the crowns are processed, for instance, for wood fuel.
Easy to retrofit: the new SuperSaw EasyConnect grapple saw by HULTDINS. It can be operated using the existing tubes and INDEXATOR rotator, which means it can also be used on cranes with internal tubes.
For a strong forwarder with hardwood using e.g. an Epsilon S110, Mesera M92, JD CF7 or Ponsse K100 crane, we combine the grapple saw with a SuperGrip 360-S-VM-HD grapple by HULTDINS. For even stronger cranes such as the Epsilon X140 and Mesera M142, the SuperGrip 420-S-VM-HD by HULTDINS is an excellent choice. These grapples can be used to work easily and economically for many thousands of hours.
Grapple saws in a sawmill
Excavators are the “worker ants” in sawmills and industrial wood processing plants. They are used for internal transportation, loading and unloading. Fitted with a grapple saw, they can also be used to divide the valuable logs. The HULTDINS SuperSaw 555-S grapple saw is ideal for large excavators such as the Sennebogen 723 or 825 and Terex Fuchs MHL331. Its sturdy housing also copes easily with hard blows. We can achieve the optimum cutting speed of the harvester chains and a high level of efficiency with the 19 cm³ grapple saw motor and pressure control.
HULTDINS also has grapple saws that are suitable for log diameters of over 80 cm and for timber bundles: the SuperSaw 650-S and SuperSaw 6000-S, both of which are fitted with ultra-strong ¾” chains.
The large HULTDINS SuperGrip 520-S-VM-HD-30 and 720-S-VM-HD grapples are designed for permanent use on excavators. They can be combined with the SuperSaw 550, 555-S, 650-S and 6000-S grapple saws.
If you already have a grapple and only want to add the grapple saw, we will be pleased to check to see if the combination you would like is suitable.
Expertise in hydraulic grapple saw drives
HULTDINS is the market leader for hydraulic grapple saw drivers for harvesters, fuel wood splitters, felling grapples and gripper saws. In order to make the right choice, it helps to address the physical associations.
Chain speeds and cutting performances of harvester chains
The maximum cutting performance of modern 404″ harvester chains with a 2.0 mm drive link thickness is achieved at a chain speed of 40 m/s. The rarer and extremely robust Oregons 11H ¾” with a drive link thickness of 3.0 mm achieve a maximum cutting performance at 35 m/s. The cutting performance no longer increases if the speed is exceeded, but wear to the track and chain does so to a far greater level. Nor can the maximum power consumption of the grapple saw chains be achieved or exceeded with the hydraulic drives. It is important to adhere to the limits in order to prevent risks.
| Manufacturer | Type | Pitch | Drive link thickness in mm | Chain speed, max., in m/s | Power consumption, max., kW |
|---|---|---|---|---|---|
| Oregon | 18HX | ,404″ | 2 | 40 | 50 |
| Oregon | 19HX | ,404″ | 2 | 40 | 50 |
| Oregon | 11H | 3/4″ | 3 | 35 | 75 |
| Stihl | RMHS | ,404″ | 2 | 40 | 65 |
Power density and chain speed
With hydraulic saw drives, we strive for a maximum chain speed of 40 m/s (“,404” pitch) for maximum productivity and crack-free cutting. To compare: the chain speed of a good power saw is 20 m/s.
HULTDINS SuperSaw grapple saws are powered by special Parker saw motors that are optimised for high speeds. There is a choice of motors of 10, 19, 40 and 60 cm3.
The motor size is chosen to suit the hydraulic performance of the support frame. For a power density of 60-110 l/min, choose a saw with a 10 cm3 motor, and a motor of 19 cm3 for larger oil quantities of up to 169 l/min. The large saws with 40 and 60 cm3 motors are the answer when there is at least 200 l/min.
| 10 cm3 | 19 cm3 | |
| Power density | Chain speed | Chain speed |
|---|---|---|
| 60 | 23 | |
| 80 | 31 | |
| 90 | 34 | |
| 100 | 38 | |
| 120 | 26 | |
| 140 | 30 |
The aim is for a chain speed of 40 m/s while maintaining the maximum motor torque and maximum power consumption of the chain.
| Motor | 10 cm3 | 19 cm3 |
| Maximum torque | 11.200 | 8.900 |
| Is achieved at l/min | 110 | 169 |
| Power consumption chain kW at 200 bar | 36 kW | 55 kW |
The 19 cm3 offers the higher torque, and so can be driven with a higher feed.
Grapple saw training
We are pleased to provide further information for machine constructors, resellers and workshop if desired, as well as on-site training with the purchase of a grapple saw. Please talk to us – we will be pleased to advise you.
We always combine HULTDINS grapple saws with the market-leading rotators by INDEXATOR.
