How to Use the OREGON® Selector Guide
How do I use this selector guide?
The selector guide is set up for you to use quickly and accurately provided you
know three things: your saw’s make, model, and guide-bar length.
How Do I Know What Size Bar I Have?
Your bar's cutting length (or "called length") is different from its
total or overall length. The cutting length is the distance from the front of
the saw to the tip of the farthest cutter, rounded to the nearest inch. This
called length is the number used in the selector guide to describe the bars
that are available for your saw. Be careful; a bar made by OREGON ® may take a
different drive link count than that of another producer. Here’s a tip: if you
have an OREGON® bar, look at the ten-digit number stamped on the motor end; the
first two digits, such as 16, tell you the called length.
Once you know the make, model, and bar length,
there are some other features you need to know, such as:
What is Chain Pitch?
Chain Pitch is the size of the chain, and is defined as the distance between
any three consecutive rivets divided by two. OREGON® chain is made in several
pitches - 1/4" is the smallest, 3/8" is the most popular, 3/4” is the
largest. Pitch is important because the drive sprocket must be the same pitch
as the chain, and if applicable, the bar nose sprocket. The easiest way to
determine the pitch of your chain is to look at the number stamped on the drive
link. See the chain-pitch-and-gauge chart below.
What is Chain Gauge?
Chain Gauge is the Drive Link's thickness where it fits into the bar groove.
The gauge of the chain and the gauge of the bar must match. OREGON® has several
gauges for chainsaws - such as, .043”, .050", .058” and .063". Normal
wear can make it difficult to accurately measure chain gauge on a worn chain.
Always order by the number stamped on the drive link of your old chain to
assure correct gauge. See the chain-pitch-and-gauge chart below.
|
Chain
Pitch and Gauge Chart |
||
|
OREGON®
part number |
Chain
Pitch |
Chain
Gauge |
|
11 |
3/4” |
.122” |
|
16 |
.404" |
.063" |
|
18 |
.404" |
.080" |
|
20 |
.325" |
.050" |
|
22 |
.325" |
.063" |
|
25 |
1/4" |
.050" |
|
27 |
.404" |
.063" |
|
33 |
.325" |
.050" |
|
34 |
.325" |
.058" |
|
35 |
.325" |
.063" |
|
50 |
.404" |
.050" |
|
51 |
.404" |
.058" |
|
52 |
.404" |
.063" |
|
58 |
.404" |
.058" |
|
59 |
.404" |
.063" |
|
72 |
3/8" |
.050" |
|
73 |
3/8" |
.058" |
|
75 |
3/8" |
.063" |
|
90 |
3/8" |
.043" |
|
91 |
3/8" |
.050" |
|
95 |
.325" |
.050" |
How do I measure the length of my chain?
The length of your chain is determined by counting the number of drive links in
your chain. Your drive link count has a direct correlation to your bar’s
length. Be careful; a bar made by OREGON® may take a different drive link count
than that of another producer. Here’s a tip: count the number of drive links in
the chain you have now, and write that number down someplace where you can find
it. Or, if you have an OREGON® chain in an OREGON® box, the drive link count is
stamped on the flap; you can save that flap for future reference.
What is the drive sprocket?
The sprocket and the clutch drum are connected to the saw motor. The sprocket
is designed to drive the proper-pitched chain around the guide bar.
A guide
to the Information you will see displayed
by the Interactive Selector Guide
1. Manufacturer: The brand
name of the saw
2. Model: The number or
name of the saw
3. Bar length: The cutting
length (or “called length”) of the saw bar, measured from the front of the saw
to the nose end of the bar. This is not the same as the actual length of the
saw bar, which is usually 4-6” greater than the cutting length.
4. Pitch: the size of the
chain, measured by determining the distance between three rivets and dividing
by two. The drive sprocket and bar nose sprocket are teamed with the chain, and
must be the same size or pitch.
5. Gauge: the thickness of
the lower portion of the chain drivelink, the part that fits into the saw bar.
The chain gauge and the bar groove gauge, or width, must be the same.
6. Part Number: The OREGON®
part number of the product.
7. Description: The brand
name of the product, e.g., SuperGuard™.
8. Drive links: The number
of drive links in the specified loop of chain.
9. Pitch: see explanation
above
10. Gauge: see explanation
above
11. Sprocket teeth: the
number of teeth in the drive sprocket, at the motor end of the unit.
13. Look up for another
manufacturer: This key takes you back to the original selector guide screen.
14. Notes field: This area
will indicate that parts for your unit are not available; it is possible for a
chain to be available, for example, and no bar.
If still unsure, please contact us giving: Manufacturer and model
of saw, length of bar, any number or letters stamped on chain, bar and sprocket
and the number of drive links. We will
then endeavour to supply you with the details to enable you
to order the correct fit-up for your saw.
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