Stihl MS 661 R C-M chain size

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

The chain for your Stihl MS 661 R C-M

Which bar is on your saw?

Which chain is on it now?

8" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 60

8" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 66

16" bar

Pitch: 3/8"
Gauge: .050"
Drive links: 60

16" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 60

18" bar

Pitch: 3/8"
Gauge: .050"
Drive links: 66

18" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 66

20" bar

Pitch: 3/8"
Gauge: .050"
Drive links: 72

20" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 72

22" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 76

22" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 77

24" bar

Pitch: 3/8"
Gauge: .050"
Drive links: 84

24" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 84

25" bar

Pitch: 3/8"
Gauge: .050"
Drive links: 84

25" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 84

28" bar

Pitch: 3/8"
Gauge: .050"
Drive links: 91

28" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 91

28" bar

Pitch: 3/8"
Gauge: .050"
Drive links: 92

30" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 97

30" bar

Pitch: 3/8"
Gauge: .050"
Drive links: 98

30" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 98

32" bar

Pitch: .404"
Gauge: .063"
Drive links: 95

32" bar

Pitch: 3/8"
Gauge: .050"
Drive links: 105

32" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 105

34" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 110

36" bar

Pitch: .404"
Gauge: .063"
Drive links: 104

36" bar

Pitch: .404"
Gauge: .063"
Drive links: 105

36" bar

Pitch: 3/8"
Gauge: .050"
Drive links: 114

36" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 114

36" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 115

42" bar

Pitch: 3/8"
Gauge: .063"
Drive links: 135

Bar mount D025

Buy this chain

3/8 pitch, .063 gauge, 60 drive links

Amazon16" Archer Chainsaw Chain 3/8" pitch FULL CHISEL .063 Gauge 60 DL drive linksSee it on Amazon

eBay16" Archer Chainsaw Chain 3/8" pitch FULL CHISEL .063 Gauge 60 DL drive links See it on eBay

As an Amazon Associate we earn from qualifying purchases. As an eBay Partner Network affiliate we may earn a commission from qualifying sales on eBay.

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

All bar lengths for the Stihl MS 661 R C-M

Chain for each bar length
Bar	Pitch	Gauge	Drive links
8"	3/8"	.063"	60
8"	3/8"	.063"	66
16"	3/8"	.050"	60
16"	3/8"	.063"	60
18"	3/8"	.050"	66
18"	3/8"	.063"	66
20"	3/8"	.050"	72
20"	3/8"	.063"	72
22"	3/8"	.063"	76
22"	3/8"	.063"	77
24"	3/8"	.050"	84
24"	3/8"	.063"	84
25"	3/8"	.050"	84
25"	3/8"	.063"	84
28"	3/8"	.050"	91
28"	3/8"	.063"	91
28"	3/8"	.050"	92
30"	3/8"	.063"	97
30"	3/8"	.050"	98
30"	3/8"	.063"	98
32"	.404"	.063"	95
32"	3/8"	.050"	105
32"	3/8"	.063"	105
34"	3/8"	.063"	110
36"	.404"	.063"	104
36"	.404"	.063"	105
36"	3/8"	.050"	114
36"	3/8"	.063"	114
36"	3/8"	.063"	115
42"	3/8"	.063"	135

The Stihl MS 661 R C-M chain depends on the bar. 8" bar: 3/8", .063", 60 drive links; 8" bar: 3/8", .063", 66 drive links; 16" bar: 3/8", .050", 60 drive links; 16" bar: 3/8", .063", 60 drive links; 18" bar: 3/8", .050", 66 drive links; 18" bar: 3/8", .063", 66 drive links; 20" bar: 3/8", .050", 72 drive links; 20" bar: 3/8", .063", 72 drive links; 22" bar: 3/8", .063", 76 drive links; 22" bar: 3/8", .063", 77 drive links; 24" bar: 3/8", .050", 84 drive links; 24" bar: 3/8", .063", 84 drive links; 25" bar: 3/8", .050", 84 drive links; 25" bar: 3/8", .063", 84 drive links; 28" bar: 3/8", .050", 91 drive links; 28" bar: 3/8", .063", 91 drive links; 28" bar: 3/8", .050", 92 drive links; 30" bar: 3/8", .063", 97 drive links; 30" bar: 3/8", .050", 98 drive links; 30" bar: 3/8", .063", 98 drive links; 32" bar: .404", .063", 95 drive links; 32" bar: 3/8", .050", 105 drive links; 32" bar: 3/8", .063", 105 drive links; 34" bar: 3/8", .063", 110 drive links; 36" bar: .404", .063", 104 drive links; 36" bar: .404", .063", 105 drive links; 36" bar: 3/8", .050", 114 drive links; 36" bar: 3/8", .063", 114 drive links; 36" bar: 3/8", .063", 115 drive links; 42" bar: 3/8", .063", 135 drive links.

Stihl genuine part numbers

If you prefer the maker's own parts, these are the numbers to ask for at a dealer.

Stihl bar and chain part numbers
Bar	Chain part no.	Bar part no.	Pitch / gauge	Drive links
20"	33 RS3 72	3003 008 8921	3/8" / .050"	72
20"	36 RS3 72	3003 008 6121	3/8" / .063"	72
22"	36 RS3 76	3003 000 9425*	3/8" / .063"	76
25"	33 RS3 84	3003 000 4030, 3003 000 9630*	3/8" / .050"	84
25"	36 RS3 84	3003 000 5231, 3003 000 6038, 3003 000 9831*	3/8" / .063"	84
28"	33 RS3 91	3003 000 8838*	3/8" / .050"	91
28"	33 RS3 92	3003 000 9638*	3/8" / .050"	92
28"	36 RS3 91	3003 000 6038, 3003 000 6041	3/8" / .063"	91
30"	36 RS3 97	3003 000 9842*	3/8" / .063"	97
30"	36 RS3 98	3003 000 6041*	3/8" / .063"	98
32"	46 RS 95**	3003 000 7346*	.404" / .063"	95
32"	33 RS3 105	3003 000 8846, 3003 000 9646	3/8" / .050"	105
32"	36 RS3 105	3003 000 6046*	3/8" / .063"	105
36"	46 RS 104**	3003 000 7353*	.404" / .063"	104
36"	46 RS 104**	3003 000 7353*	.404" / .063"	105
36"	33 RS3 114	3003 000 8853, 3003 000 9653	3/8" / .050"	114
36"	36 RS3 114	3003 000 6053*	3/8" / .063"	114
36"	36 RS3 115	3003 000 9853*	3/8" / .063"	115

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 Stihl MS 661 R C-M take?

How many drive links is a Stihl MS 661 R C-M chain?

It depends on the bar: 60 on a 8" bar, 66 on a 8" bar, 60 on a 16" bar, 60 on a 16" bar, 66 on a 18" bar, 66 on a 18" bar, 72 on a 20" bar, 72 on a 20" bar, 76 on a 22" bar, 77 on a 22" bar, 84 on a 24" bar, 84 on a 24" bar, 84 on a 25" bar, 84 on a 25" bar, 91 on a 28" bar, 91 on a 28" bar, 92 on a 28" bar, 97 on a 30" bar, 98 on a 30" bar, 98 on a 30" bar, 95 on a 32" bar, 105 on a 32" bar, 105 on a 32" bar, 110 on a 34" bar, 104 on a 36" bar, 105 on a 36" bar, 114 on a 36" bar, 114 on a 36" bar, 115 on a 36" bar, 135 on a 42" bar. The bar length is usually printed near the mount.

What bar fits a Stihl MS 661 R C-M?

A bar with the D025 mount, in one of these lengths: 8", 16", 18", 20", 22", 24", 25", 28", 30", 32", 34", 36", 42".

Related Stihl saws

Every Stihl model