The Engineer's Place for News and Discussion®

 Previous in Forum: Spring Calculation Next in Forum: Over Coat Interval

### Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

### Rating Vote:

Guru

Join Date: Sep 2008
Location: Vancleave, Ms about 30 miles inland from Biloxi and the coast
Posts: 2402

### Roller Chains

01/29/2012 11:40 AM

I know the difference between #40 and #41 chains. I see sprockets available only in #40, but no #41. When do you specify a 40 or 41 chain? I take it the #40 sprocket works with either chain.

__________________
Almost as smart as the average bear
Interested in this topic? By joining CR4 you can "subscribe" to
Guru

Join Date: Oct 2008
Location: 34° 34' 21.60" N, 92° 55' 42.28" W
Posts: 21346
#1

### Re: Roller chains

01/29/2012 12:14 PM

Width is different.

Pitch (inches)Pitch expressed
in eighths
ANSI standard
chain number
Width (inches)

14

28

25

18

38

38

35

316

12

48

41

14

12

48

40

516

58

58

50

38

34

68

60

12

1

88

80

58

Notes:
1. The pitch is the distance between roller centers. The width is the distance between the link plates (ie slightly more than the roller width to allow for clearance).

From Wiki.

__________________
Luck comes and goes. Skill is forever. Intelligence either is, or it ain't. lyn
Guru

Join Date: Sep 2008
Location: Vancleave, Ms about 30 miles inland from Biloxi and the coast
Posts: 2402
#2

### Re: Roller chains

01/29/2012 1:01 PM

Upon further investigation, #40 sprockets and #41 chains are not compatable with each other. I found sprockets for #41 and #40 chain. The #40 sprocket takes a .312"dia roller while the #41 sprocket takes a .306"dia roller. How do you choose which one to use? The #40 is twice as strong as the #41. Is there another parameter to consider?

__________________
Almost as smart as the average bear
Guru

Join Date: Mar 2007
Location: at the beach in Florida
Posts: 5669
#3

### Re: Roller chains

01/29/2012 1:21 PM

What is the application? The basis for choosing a chain and sprocket is going to be application and environment, serviceability, is the application critical, everything...

__________________
The relentless pursuit of knowledge....
Guru

Join Date: Sep 2008
Location: Vancleave, Ms about 30 miles inland from Biloxi and the coast
Posts: 2402
#6

### Re: Roller chains

01/30/2012 1:24 PM

I'm using it as an X and Y-axis drive for a CNC router. It will be subject to rapid reversal. It has to be taut to eliminate backlash. I'm actually using #25 chain, but considering going to #40 or 41. The chain is stationary; the sprockets mesh with the chain similar to a rack and pinion drive.

__________________
Almost as smart as the average bear
Guru

Join Date: Dec 2005
Location: Mariposa Ca
Posts: 9887
#7

### Re: Roller chains

01/30/2012 2:02 PM

do you feel the #25 chain is stretching?

how are the sprockets mounted? taperlocks have the least amount of runout

you might also consider synchronous belts, which will provide very good accuracy & low wear

http://www.gates.com/brochure.cfm?brochure=7911&location_id=11536

Power-User

Join Date: Oct 2007
Posts: 245
#5

### Re: Roller chains

01/30/2012 8:29 AM

I believe #41 is used for bicycles.

oilcan13

Power-User

Join Date: Dec 2006
Location: In the sticks of the Central Kootenays, BC, Canada
Posts: 194
#4

### Re: Roller Chains

01/29/2012 11:48 PM

No. 41 chain is an oddball. Unless you are manufacturing something where a small savings per part is important, use No. 40 chain. It was likely developed to fill a gap between No. 35 and No 40 chain.

It seems to me that there is something else different about No. 41--it may be rollerless or have some other feature that makes it a little less costly to produce.

Jon.

Active Contributor

Join Date: Feb 2007
Location: Sunshine coast, British Columbia
Posts: 12
#8

### Re: Roller Chains

01/30/2012 5:30 PM

#41 is considered a lighter product. It probably originated as a proprietary product specific to an implement manufacturer (New Holland and I.H. were infamous for including non-standard machined parts and bearings in their designs. HEAVY ROLLER CHAIN was introduced by I.H. to compete with aftermarket sales of standard varieties.) #41 DOES have the advantage of a slightly lower weight relative to length, and it is made in zinc and nickle-plated varieties (used on fertilizer spreaders). There is no difference in breaking strength between #40 and #41. Breaking strength is determined by the ROLLER PIN DIAMETER which is identical in both these configurations

__________________
The Universe is made up of parts
Power-User

Join Date: Dec 2010
Posts: 368
#9

### Re: Roller Chains

01/30/2012 9:12 PM

41 is properitary developed size but has become commen as being used on bicycles. You are using 25 no. you can very well switsh to 35 or 40, which are standard products.