How to Use the Carlton® Harvester 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 harvester head make, model, and guide-bar length. If you don’t know all three of those characteristics, you should contact the equipment dealer where you purchased your harvester. The overall length of the bar is calculated by measuring the distance from your harvester bar's tail to its tip. This length is the number used in the selector guide to describe the bars that are available for your harvester head. Be careful; a bar made by Carlton® may take a different drive link count than that of another producer.

How Do I Know What Size Bar I Have?
Be careful; a bar made by Carlton® may take a different drive link count than that of another producer. Here’s a tip: if you have an Carlton® bar, look at the number stamped on the motor end; the first two digits, such as 75, 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. Carlton® harvester chain is made in two pitches - .404" and 3/4". 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.
Pitch

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. Carlton® has two gauges for harvesters - .080", and .122". 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.
gauge   gauge

Chain Pitch and Gauge Chart
Chain Pitch Carlton® part number Chain Gauge DL Stamp Mark

.404"

B8HC

.080"

B8

3/4"

G7SP

.122"

G7


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 Carlton® 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 Carlton® chain in an Carlton® box, the drive link count is stamped on the flap; you can save that flap for future reference.
chain length
What is the drive sprocket?
The sprocket is connected to the saw motor by a shaft. The sprocket is designed to drive the proper-pitched chain around the guide bar.


Below is a guide to the information you will see displayed by the Interactive Selector Guide.


Selector Guide Select MFG. Select Model Select Bar Length Chain Pitch Gauge Part Number Description Drive Link Count Chain Pitch Gauge # of sprocket teeth Gauge sprocket teeth File Diameter

1. Manufacturer: The brand name of the harvester head

2. Model: The number or name of the harvester head

3. Bar length: The overall length of the bar, measured from the tail to the tip of the bar.

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 Carlton® part number of the product.

7. Description: the product name

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

9. 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.

10. 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.

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

12. File size: Sharpening file diameter

13. Notes field: Look in this area for important messages about part information. For example, if you choose a .080” gauge chain and a .122” bar, you will see the note: Please see your Servicing Dealer to verify pitch, gauge, and motor mount . 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.

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