Modified Stock Gearing - Boston Gear

Engineering Information
Conveyor Chain Selection (Continued)
Example 2. A horizontal conveyor 25 Ft. long is to move a
product weighing 200 Lbs. per Ft. at 20 FPM. Two FT2060
Flat-Top chains will be used, if possible, with the thermoplastic
plates supported on metal ways without lubrication.
Chain Pull,
W = (M + 2m) Cf
M = 200 Lbs. per Ft.
m = 1.41 x 2 = 2.82 (two chains)
C = 25 Ft.
f = .25 + .15 = .40 (for starting with load)
W = (200 + 5.64) 25 x .40 = 2056 Lbs.
The maximum working load of FT2060 chain at 20 FPM is
1170 Lbs. (see table) and this will be adequate if the product
cannot become stalled.
Note: Whenever two strands of chain are used, the total chain
weight will be double the single strand weight, (per foot).
COEFFICIENT OF FRICTION FOR CONVEYOR CHAIN
Plate
High
Material Stainless Carbon Density Impreg-
Delrin Nylon
nated
Stainless Steel Steel
Poly-
Steel ethylene Wood
Dry .41 .41 .30 .35 .15 .11
Water .35 .35 .25 .30 .12 .11
Soap & Water .20 .20 .25 .20 .08 .11
Carbon Steel
Dry .41 .39 .30 .35 .15 .11
Water .35 .35 .25 30 .12 .11
Soap .20 .20 .15 .20 .08 .11
Acetal Plastic
Dry .30 .30 .20
Water .25 .25 .20
Soap & Water .15 .15 .10
Nylon
Dry .35 .35 .25
Water .30 .30 .25
Soap & Water .20 .20 .12
Single
Pitch
Double
Pitch
Velocity
of
Chain
(FPM)
*No. 35 Chain is a Rollerless Chain.
CHAIN LOAD RATING CHART
Chain Numbers
35* 40 50 60 80 100 120 160
C2040
†For Hollow Pin chains, the working load (chain pull) should be multiplied by
1.3 to obtain the proper value for use in selecting the chain pitch required.
Flat Top Conveyor Chain
C2050 C2060 C2080 C2100 C2120 C2160
Maximum Working Load or
Chain Pull (Lbs.)
25 250 443 690 995 1770 2760 3990 7100
50 243 432 675 970 1730 2690 3880 6900
75 233 414 645 930 1660 2580 3720 6630
100 220 391 610 880 1570 2440 3520 6250
125 206 366 570 820 1460 2280 3290 5850
150 190 338 528 760 1350 2110 3040 5400
175 175 311 485 700 1240 1940 2800 4970
200 160 284 444 640 1140 1770 2560 4550
225 146 259 405 584 1040 1620 2340 4150
250 133 236 368 530 940 1470 2120 3770
275 120 214 333 480 855 1330 1920 3310
300 110 195 305 440 780 1220 1760 3120
Standard Pitch Boston Sprockets To Operate
With Above Chain
Pitch 3/8” 1/2” 5/8” 3/4” 1” 1-1/4” 1-1/2” 2”
MAXIMUM WORKING LOAD OR CHAIN PULL (LBS.)
Chain
Chain Velocity — Feet Per Minute
Type 0-10 20 30 40 50 70
FT2060 1070 1045 1035 1030 1025 1015
MAXIMUM WORKING LOAD OR CHAIN PULL (LBS.)
Chain
Chain Velocity — Feet Per Minute
Type 100 150 200 250 300 400
FT2060 1005 960 915 855 670 435
G
SINGLE PITCH
ROLLER CHAIN WITH
ATTACHMENTS
DOUBLE PITCH
ROLLER CHAIN WITH
ATTACHMENTS
To select the proper chain, the working load or chain pull and
the chain speed in feet per minute must be known. Using this
information find the proper chain in the chart.† These load
ratings are based on proper installation, lubrication and
steady load conditions.
The minimum permissible number of sprocket teeth is 15 for
single pitch, and 24 for double pitch chain. For smoother
operation, sprockets with greater numbers of teeth than the
minimum are recommended.
LUBRICATION - To assure maximum chain life, carbon and
stainless steel chains should be lubricated wherever possible.
Soap lubrication is recommended. Several detergent and
nonalkali fluid types are on the market. Water lubrication
should be used when no other lubricant can be tolerated.
Drip-type systems and wheel-type and sponge-type
applicators are on the market.
Delrin chain tends to be self-lubricating, although wear life can
be extended with the use of a lubricant, such as soap and
water.
P-1930-BG 04/10 Boston Gear 800-825-6544 247