Over 110 years of Quality P e rf o rmance and Serv i c e

STANDARD ATTACHMENT
ROLLER CHAIN
Chain Descriptions and Dimensions
www.diamondchain.com
Standard Attachment Roller Chain
Single- and Double-Pitch chains are available assembled with either attachment link plates or extended pins. While most carbon steel
attachment chains fall within Diamond’s Attachment Chain Program and ship in 48 hours (for quantities up to 100 feet) in 3-5 working
days (for quantities of 101 to 300 feet) or in 5-7 working days (for quantities of 301 to 500 feet), stainless steel, nickel-plated and ACE coated
attachment chains also get special attention through Diamond's 5-day shipping program. These attachments' shapes and sizes are "standard"
their uses are limited only by your imagination. Now the chain that lasts the longest, arrives the fastest because from the minute you place your
order, we have from 48 hours to 5 days to get it out the door. That way you don’t wait -- wasting countless dollars in downtime.
When designing or specifying attachment chains, consider the following information to avoid problems with either
installation or performance.
Standard Attachments: Standard attachments described on the following pages are normally much less expensive
than special designs. However, if a specialty attachment is necessary please refer to the Made-To-Order section of
this guide or contact Diamond’s application engineers for possible design options.
Link Plate Location: Attachments, regardless of standard or special design, assembled on pin links are less
expensive than those assembled on roller links.
Modifications: Diamond’s attachment link plates are specifically designed and heat treated to permit further operations
by the user such as drilling, reaming, and tapping if desired. At no time should attachment links be modified by
welding because the heat applied can adversely affect the heat treatment of the steel, resulting in either reduced
performance or failure.
Extended Pins: Extended pins, made from medium carbon steel, are specially heat treated for ductility and toughness
and can be easily assembled at virtually any spacing. It is important to note that if pairs of extended pins are
specified, they must be located in a common pin link. In some applications this may require the use of an offset in the
cycle.
Diamond does not recommend using “shouldered pins.” They are generally expensive to manufacture and can often
compromise quality due to high stress concentrations at the point where diameters change. Additions of sleeves or
bearings on the extended pins will often yield a more dependable design and at a lower cost.
Attachment Hole Sizes: Diamond’s standard attachment hole sizes are designed to accommodate the most
common screw sizes. If your application requires a different attachment hole size, than shown in this section, please
contact Diamond, as many alternate lug holes are available and may be available from stock.
Dimensions in Inches
Chain Hole Screw Screw
Size Diameter Size Diameter
25 .125 #3 .099
35 .102 #2 .086
40 .141 #5 .125
41 .141 #5 .125
50 .203 #10 .190
60 .203 #10 .190
80 .266 1
⁄ 4 .250
100 .343 5
⁄ 16 .312
120 .386 3
⁄ 8 .375
140 .448 7
⁄ 16 .438
160 .516 1
⁄ 2 .500
Dimensions in Inches
Chain Hole Screw Screw
Size Diameter* Size Diameter
C2040 .141 # 5 .125
C2050 .203 #10 .190
C2060H .203 #10 .190
C2080H .266 1
⁄ 4 .250
C2100H .328 5
⁄ 16 .312
C2120H .391 3
⁄ 8 .375
C2160H .516 1
⁄ 2 .500
*Straight, one hole attachments have larger diameters than shown. Refer to Double-
Pitch Straight and Bent Attachment tables for more detail.
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