Engineering Info on Harvester Cutting Attachments
The following information is provided courtesy of OREGONŽ Cutting Systems. It relates information critical to success of saw chain-based cutting systems in mechanized wood harvesting and processing equipment. In offering this information, we do not assume any responsibility for the design or manufacture of machines, or for the content of literature supplied by machine manufacturers. The purpose of this information is to communicate important information to designers, manufacturers, sellers, and users of wood-harvesting and processing machinery.
Technical Data In Metric Units
| Chain Size | .404" Pitch | 3/4" Pitch | ||
| OREGONŽ Chain Number | #16H | #18H | #11BC | #11H |
| Physical Properties |
||||
| Weight, kg/m. | .327 | .369 | .949 | .937 |
| Tensile Strength, N | 11500 | 12000 | 30000 | 30000 |
| Kerf, mm | 8.6 | 8.9 | 14 | 15 |
| Gauge, mm | 1.6 | 2.0 | 3.1 | 3.1 |
| Actual Pitch, mm | 10.3 | 10.3 | 19.9 | 19.9 |
| Bar Thickness, mm min/max | 5.7/6.0 | 6.0/6.4 | 9.0/10.4 | 9.0/10.4 |
| Sprocket Thickness, mm | 12 | 12 | N/A | N/A |
| Operating Parameters |
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| Bar/Chain Oil cc per minute | 30 | 30 | 40 | 40 |
| Bar/Chain Oil cc per stroke | 8 | 8 | 10 | 10 |
| Power, kW min/max | 7/35 | 7/35 | 4/40 | 4/40 |
| Force on Bar to Tension Chain, N | 490 | 490 | 668 | 668 |
| Bar Feed Load, at Center, N, min/max | 220/310 | 220/310 | 130/445 | 130/445 |
| Bar Feed Load, at Center, N, recom | 270 | 270 | 335 | 335 |
| Chain Speed, m/sec, min/max | 15/40 | 15/40 | 8/35 | 8/35 |
| Chain Speed, m/sec recommended | 40 | 40 | 30 | 30 |
| Min. Bar Adjust, cm/cm of bar length | 0.015 | 0.015 | 0.019 | 0.019 |
Technical Data In English Units
| Chain Size | .404" Pitch | 3/4" Pitch | ||
| OREGONŽ Chain Number | #16H | #18H | #11BC | #11H |
| Physical Properties | ||||
| Weight, lbs/ft. | 0.220 | 0.248 | 0.638 | .0.630 |
| Tensile Strength, lbs. | 2600 | 2700 | 6700 | 6700 |
| Kerf, in. | 0.34 | 0.35 | 0.57 | 0.57 |
| Gauge, in. | 0.063 | 0.080 | 0.122 | 0.122 |
| Actual Pitch, in. | 0.4055 | 0.4055 | 0.7835 | 0.7835 |
| Bar Thickness, in. min/max | .225/.237 | .238/.252 | .355/.41 | .355/.41 |
| Sprocket Thickness, in. | 0.46 | 0.46 | N/A | N/A |
| Operating Parameters | ||||
| Bar/Chain Oil cubic inches per minute | 2 | 2 | 2.5 | 2.5 |
| Bar/Chain Oil cubic inches per stroke | 0.5 | 0.5 | 0.6 | 0.6 |
| Power, hp min/max | 10/50 | 10/50 | 5/55 | 5/55 |
| Force on Bar to Tension Chain, lbs. | 110 | 110 | 150 | 150 |
| Bar Feed Load, at Center, lbs., min/max | 50/70 | 50/70 | 30/100 | 30/100 |
| Bar Feed Load, at Center, lbs., recom | 60 | 60 | 80 | 80 |
| Chain Speed, ft/min., min/max | 3000/8000 | 3000/8000 | 1500/7000 | 1500/7000 |
| Chain Speed, ft/min. recommended | 8000 | 8000 | 6000 | 6000 |
| Min. Bar Adjust, in/in of bar length | 0.015 | 0.015 | 0.019 | 0.019 |
These guidelines are intended to provide a balance between performance and service life. If these guidelines are exceeded, operators must be aware that excessive chain speed or feed force: reduces service life and increases wear, requires extra lubrication and attention to tensioning and sharpening,and increases the incidence of chain breakage and the risk of injury.
The information above is provided courtesy of OREGONŽ Systems Division of Blount, Inc., from their Mechanical Timber Harvesting Handbook. We urge you to contact OREGONŽ customer service at (503) 653-8881 for explanation or clarification of information you are unsure of or do not understand.
Would you like a copy of the OREGONŽ Mechanical Timber Harvesting Handbook? Next time you place an order, just ask. We'd be happy to include a FREE copy in your package. This document is filled with valuable information for harvester cutting attachments of all sizes.