Naarva Stroke Harvester with saw S23C
AS SIMPLE AS IT GETS – NAARVA S23C HARVESTER HEAD FOR TRACTORS AND SMALL EXCAVATORS
Naarva S23C stroke harvester with saw is mounted to the place of a loading grapple and requires no extra hydraulics or electricity. It can fell, delimb and cut timber.
AUTOMATIC OPERATION WITH PRESSURE-CONTROLLED VALVES
Operation of S23C harvesting head is based on pressure-controlled sequence valves. Grapple close-button closes the grippers. When grapple-close button is kept pressed, pressure rises and pressure-controlled valves release oil flow to the delimbing stroke cylinder. After delimbing you can reverse by pressing grapple open-button. If you want to cut the tree, keep grapple close-button pressed, pressure rises and oil flow is guided to the cutting unit. S23C delimbs the tree 0,5 meters per stroke. This means six delimbing strokes to make a three meter tree trunk.
More information about Naarva Stroke Harvester with saw S23C
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MECHANICAL TILT
S23C stays upright because of center of gravity. When you grab a tree and pressure rises, delimbing head starts to move. Delimbing head hits the tilt body and locks against it firmly. After cutting you can choose the direction for felling, because the tree stays upright. When you press grapple-open button the delimbing head reverses and the head is no longer locked in the upright position. Weight of the tree tilts the head to delimbing position. When you drop the tree, S23C returns to upright position because of center of gravity.
MODULARITY
Structure of S23 and S23C is modular. The guillotine unit in Naarva S23 harvester can be replaced with a saw cutting unit. It is mounted to the same place and you only have to connect two hoses and bolts. Both S23 and S23C harvesting heads are lightweight and simple. S23C weighs only 240-260 kg and requires only min. 40 l / min oil flow.
EXTENSION BOOM KIT FOR EXCAVATORS
S23C can also be installed to 5-8 ton excavators. For excavator installations we provide an extension boom kit. It includes an extension boom with 1,25 meter reach, quick coupler for the boom, rotator, link and all required hydraulics. S23C only requires one two-directional valve from the base machine.
OPTIONAL BLUETOOTH SYSTEM
Bluetooth system enables length measuring, automatic delimbing and cutting to length. Diameter measuring is also available. 7″ tablet display. Read more from “accessories”.
FEATURES
- Felling and delimbing
- Weight 240-260 kg
- Easy installation, no eletricity or extra hydraulics
- Fast saw cutting, Ø 30 cm
SUITABLE FOR
- First thinnings
- Cutting hard wood
- Energy wood harvesting
- Integrated harvesting
Technical info
| Model | S23C |
| Weight | 240 – 260 kg (529 – 573 lbs) depending on accessories |
| Cutting diameter and speed | Ø 30 cm, 1 s (12″”) |
| Delimbing diameter | 5-30 cm |
| Dimensions | Length 91 cm, width 81 cm, height 130 cm |
| Delimbing length and force | 50 cm, 21 kN |
| Delimbing speed | 1,1 s / 0,5 m stroke |
| Required pressure | 170-200 bar |
| Required oil flow | 40-60 l / min (10-16 gpm) |
