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. If you don’t know all three of those characteristics, you should go to your nearest OREGON® dealer, with your saw in hand, for help.

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
(stamped on Drive-link)
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.

What is ANSI?
Certain provisions of the safety standard known as the "ANSI (American National Standards Institute) B175.1" contain requirements designed to reduce the risk of injury from chainsaws sold in the United States. The following information should be used as a guide for the selection of appropriate replacement chains and guide bars in order to maintain compliance with the ANSI standard (United States only).

The ANSI standard B175.1 divides all chain saw power heads into two groups:
- Under 3.8 cubic-inch (62cc) engine displacement, the chain meets the standard and is identified by green markings or labels.
- 3.8 cubic inch (62cc) and larger, the chain DOES NOT meet the standard and is identified by yellow markings or labels.

Saws 3.8 cubic inches (62cc) and larger may, but are not required to, comply with ANSI low-kick-back provisions. These saws are not recommended for general use and may be capable of kickback that could result in serious injury. Larger saws should be operated by users with experience and/or specialized training for dealing with kickback.

When replacing chain on saws less than 3.8 cubic inches (62cc), any low-kickback chain of the proper pitch and gauge can be used. OREGON® identifies and labels all low-kickback chain in green. OREGON® safety features greatly reduce the hazard of kickback while maintaining high cutting performance. However, ALL CHAINS CAN KICKBACK, which may result in severe personal injury to the saw operator or bystander.

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. ANSI Color: Green indicates low-kickback; yellow indicates professional, not low-kickback use.

7. Part Number: The Oregon® part number of the product.

8. Description: The brand name of the product, e.g., SuperGuard™.

9. Drive links: The number of drive links in the specified loop of chain.

10. Pitch: see explanation above

11. Gauge: see explanation above

12. Sprocket teeth: the number of teeth in the drive sprocket, at the motor end of the unit.

13. Shopping List: check this box if you want the product to be carried over when you go to the on-line store; a selection here does not mean you have ordered the product, only that you intend to decide later whether or not to order it.

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.

15. Need more information: This feature is a link to this page.

16. View Your Shopping List: Clicking on this area will bring up a list of the parts you previously selected, along with any notes that apply. Look in this area for important messages about your selections; for example, if you choose a .050” gauge chain and a .063” bar, you will see a note that the two parts don't match. You can still choose these parts because it's possible to be buying for two different saws, but you will be notified that there is a discrepancy.

17. Look up for another manufacturer: This key takes you back to the original selector guide screen.