EXTENSIONCORDS
CHAIN SAW TERMINOLOGY
Bucking
Kickback, Pinch (Fig. 4)
Grounded tools require a three wire ex- tension cord. Double insulated tools can use either a two or three wire extension cord. As the distance from the supply out- let increases, you must use a heavier gauge extension cord. Using extension cords with inadequately sized wire causes a serious drop in voltage, resulting in loss of power and possible tool damage. Refer to the table shown to determine the re- quired minimum wire size.
The smaller the gauge number of the wire, the greater the capacity of the cord. For example, a 14 gauge cord can carry a higher current than a 16 gauge cord. When using more than one extension cord to make up the total length, be sure each cord con- tains at least the minimum wire size re- quired. If you are using one extension cord for more than one tool, add the nameplate amperes and use the sum to determine the required minimum wire size.
Guidelines for Using Extension Cords
•If you are using an extension cord out- doors, be sure it is marked with the suffix
•Be sure your extension cord is prop- erly wired and in good electrical condition. Always replace a damaged extension cord or have it repaired by a qualified person before using it.
•Protect your extension cords from sharp objects, excessive heat and damp or wet areas.
Recommended Minimum Wire Gauge for Extension Cords*
Nameplate | Extension Cord Length | |||||
Amperes | 25' | 50' | 75' | 100' | 150' | |
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0 - 2.0 | 18 | 18 | 18 | 18 | 16 | |
2.1 | - 3.4 | 18 | 18 | 18 | 16 | 14 |
3.5 | - 5.0 | 18 | 18 | 16 | 14 | 12 |
5.1 | - 7.0 | 18 | 16 | 14 | 12 | 12 |
7.1 - 12.0 | 16 | 14 | 12 | 10 |
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12.1 | - 16.0 | 14 | 12 | 10 |
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16.1 | - 20.0 | 12 | 10 |
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*Based on limiting the line voltage drop to five volts at 150% of the rated amperes.
The process of cross cutting a felled tree or log into lengths.
Chain Brake
A device used to stop the chain saw.
Chain Saw Powerhead
A chain saw without the saw chain and guide bar.
Clutch
A mechanism for connecting and discon- necting a driven member to and from a ro- tating source of power.
Drive Sprocket or Sprocket
The toothed part that drives the saw chain.
Felling
The process of cutting down a tree.
Felling Back Cut
The final cut in a tree felling operation made on the opposite side of the tree from the notching undercut.
Front Handle
The support handle located at or toward the front of the chain saw.
The rapid push back of the saw which can occur when the wood closes in and pinches the moving saw chain in the cut along the top of the guide bar.
Fig. 4
Kickback, Rotational (Fig. 5)
The rapid upward and backward motion of the saw which can occur when the mov- ing saw chain near the upper portion of the tip of the guide bar contacts an object, such as a log or branch.
Fig. 5
A chain that complies with the kickback performance requirements of ANSI B175.1- 2000 when tested on a representative
READ AND SAVE ALL INSTRUCTIONS FOR FUTURE USE.
Front Handle Guard
A structural barrier between the front handle of a chain saw and the guide bar, typically located close to the hand position on the front handle and sometimes em- ployed as an activating lever for a chain brake.
Guide Bar
A solid railed structure that supports and guides the saw chain.
Kickback
The backward or upward motion, or both of the guide bar occurring when the saw chain near the nose of the top area of the guide bar contacts any object such as a log or branch, or when the wood closes in and pinches the saw chain in the cut.
sample of chain saws.
Normal Cutting Position
Those positions assumed in performing the bucking and felling cuts.
Notching Undercut
A notch cut in a tree that directs the tree’s fall.
Oiler Control
A system for oiling the guide bar and saw chain.
Rear Handle
The support handle located at or toward the rear of the saw.
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