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This is a New Genuine OEM Oregon Power Mate Rim Sprocket, part number 68210. This 7 tooth rim sprocket is for 3/8" Pitch chainsaw chain.

Oregon Power Mate rim sprockets for chainsaws. Rims float on the splined hub of the drum and move side to side, allowing the chain and rim to align with the bar as the chain travels around the bar"s groove. The rim gets most of the sprockets wear, and by being replaceable, it extends the overall life and value of the sprocket system. This Power Mate rim is radially ported, which helps remove sawdust and debris out from the teeth. This rim also has wear depth indicators which tell you when to replace your rim. Standard splined rims have an inside sprocket bore of approximately 7/8".

Important Note *SD7 Standard 7 Spline Rims have an interior diameter of approximately 7/8" (less the splines) and will only fit clutch drums with that diameter bore. Please check before ordering.

Oregon 68210 Power Mate Replacement Rim used on Oregon 12667X, 13916X, 16208, 18200X, 22209, 23706X, 25842X, 26831, 27189X, 28094X, 28187X, 29313X, 30666X Power Mate Rim Sprocket Systems
Also used with Oregon 30672X, 30685X, 35464X, 36868X, 38470X, 68209X, 100757, 102469, 105772X, 106593X, 108565X, 11203X, 111450X, 111590X, 509604X Power Mate Rim Sprocket Systems
For 3/8" Pitch Chain Saws with 7-Tooth Rim Standard 7 Spline (Sd7) Sprocket System
Replace rim every two chain loops
For use on Cub Cadet, Homelite, Dolmar, Echo, Husqvarna, Olympyk, John Deere, Jonsered, Makita, Mastercraft, McCulloch, Poulan, Remington, Sears, Skil, Stihl.

We are an Authorized Oregon dealer and work on all small engines and saws so if you have any questions about fitment for your particular application or engine please contact us and we will be happy to answer. Please have your make and model information ready.

Nolt's Power Equipment (Formerly Perry Power Equipment) is located at 3720 Shermans Valley Rd, Loysville PA 17047. We are your source for Lawn & Garden Sales and Service - click here to see my other items on Ebay.

Return:
If you are not satisfied with our items and want to return to us, please initiate a Return Request through eBay. If the item was ordered by mistake, all original shipping charges will be subtracted from the refund amount.

The following are some handy tips on saw chain from Oregon

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.

Consumer Chain uses a letter system. Please see table below for more information:

Chain Codes:	D	H	S	G	J	L	R
Chain Types:	72V	20BPX	91 Low Profile	95VPX	21BPX	22BPX	90SG
Pitch:	3/8"	.325"	3/8"	.325"	.325"	.325"	3/8"
Gauge:	.050"	.050"	.050"	.050"	.058"	.063"	.043"

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"
21	.325"	.058"
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, the drive link count is stamped on the gold ID link; you can refer to that gold ID link for future reference.