RedMax GZ550 chain size

Chainsaw drawing: the bar and chain are the parts this page is about

The chain for your RedMax GZ550

Which bar is on your saw?

Which chain is on it now?

15" bar

Pitch: .325"
Gauge: .058"
Drive links: 64

Oregon J64
Same as Stihl 25RM3, Stihl 25RS3, Husqvarna H25
File 3/16"

16" bar

Pitch: .325"
Gauge: .050"
Drive links: 66

Oregon H66
Same as Stihl 23RM3, Husqvarna H22, Husqvarna H22X
File 3/16"

16" bar

Pitch: .325"
Gauge: .058"
Drive links: 66

Oregon J66
Same as Stihl 25RM3, Stihl 25RS3, Husqvarna H25
File 3/16"

18" bar

Pitch: .325"
Gauge: .050"
Drive links: 72

Oregon H72
Same as Stihl 23RM3, Husqvarna H22, Husqvarna H22X
File 3/16"

18" bar

Pitch: .325"
Gauge: .058"
Drive links: 72

Oregon J72
Same as Stihl 25RM3, Stihl 25RS3, Husqvarna H25
File 3/16"

20" bar

Pitch: .325"
Gauge: .050"
Drive links: 78

Oregon H78
Same as Stihl 23RM3, Husqvarna H22, Husqvarna H22X
File 3/16"

20" bar

Pitch: .325"
Gauge: .058"
Drive links: 78

Oregon J78
Same as Stihl 25RM3, Stihl 25RS3, Husqvarna H25
File 3/16"

Bar mount K095

Buy this chain

Oregon J64, 64 drive links

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Check pitch, gauge and drive links on the listing before you order. How this works

All bar lengths for the RedMax GZ550

Chain for each bar length
Bar	Pitch	Gauge	Drive links	Chain
15"	.325"	.058"	64	J64
16"	.325"	.050"	66	H66
16"	.325"	.058"	66	J66
18"	.325"	.050"	72	H72
18"	.325"	.058"	72	J72
20"	.325"	.050"	78	H78
20"	.325"	.058"	78	J78

The RedMax GZ550 chain depends on the bar. 15" bar: .325", .058", 64 drive links; 16" bar: .325", .050", 66 drive links; 16" bar: .325", .058", 66 drive links; 18" bar: .325", .050", 72 drive links; 18" bar: .325", .058", 72 drive links; 20" bar: .325", .050", 78 drive links; 20" bar: .325", .058", 78 drive links.

Check the chain on your saw

Drawing: pitch is the distance between three rivets divided by two — **Pitch** Measure across three rivets and divide by two. Common pitches are 1/4", .325", 3/8" and .404".

Drawing: gauge is the thickness of the drive link in the bar groove — **Gauge** The thickness of the drive link that rides in the bar groove: .043", .050", .058" or .063".

Drawing: count the drive links, the tabs under the chain — **Drive links** Lay the chain flat and count the tabs underneath. Mark one with a paint pen so you know where you started.

Find pitch and gauge from the number on a drive link

Stamp number

Type the number on a drive link

See all stamp numbers

Drive link stamp number to pitch and gauge
Stamp	Pitch	Gauge
11	3/4"	.122"
16	.404"	.063"
18	.404"	.080"
20	.325"	.050"
21	.325"	.058"
22	.325"	.063"
25	1/4"	.050"
26	.404"	.058"
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"
68	.404"	.063"
72	3/8"	.050"
73	3/8"	.058"
75	3/8"	.063"
80	.325" LP	.043"
90	3/8" LP	.043"
91	3/8" LP	.050"
95	.325"	.050"

Questions people ask

What size chain does a RedMax GZ550 take?

How many drive links is a RedMax GZ550 chain?

It depends on the bar: 64 on a 15" bar, 66 on a 16" bar, 66 on a 16" bar, 72 on a 18" bar, 72 on a 18" bar, 78 on a 20" bar, 78 on a 20" bar. The bar length is usually printed near the mount.

What bar fits a RedMax GZ550?

A bar with the K095 mount, in one of these lengths: 15", 16", 18", 20".

Other saws with the same chain

All saws that take J64 All saws that take H66 All saws that take J66

Related RedMax saws

Every RedMax model