Engineering Data | ACSI Conveyor Engineering Resources

Chart 1

Bed & Undertrussing Chart.

Use this chart to determine the undertrussing configuration required for belt conveyor bed lengths from 3′ through 40′.

Rod Sizes

Type A — 50″ long × ⅝″ diameter
Type B — 62″ long × ⅝″ diameter
Type C — 119″ long × ⅝″ diameter

Note: For center drive, use Type No. 2 Center Bracket on both sides of the drive.

Bed Length	Bracket / Support Configuration
3′0″ – 10′0″	End brackets only — no undertrussing required
12′0″	Two 6′ sections — one Type No. 4 Joint Support Angle at center bed joint
14′0″	6′ + 8′ sections — one Type No. 4 at center bed joint
16′0″	6′ + 10′ sections — one Type No. 4 at center bed joint
18′0″	8′ + 10′ sections — one Type No. 4 at center bed joint
20′0″	Two 10′ sections — one Type No. 1 Center Bracket at center bed joint
22′0″	6′ + 10′ + 6′ sections — two Type No. 1 brackets at bed joints
24′0″	6′ + 10′ + 8′ sections — two Type No. 1 brackets at bed joints
26′0″	6′ + 10′ + 10′ sections — two Type No. 1 brackets
28′0″	8′ + 10′ + 10′ sections — two Type No. 1 brackets
30′0″	Three 10′ sections — two Type No. 1 brackets at bed joints
32′0″	6′ + 10′ + 10′ + 6′ — Type No. 1, Type No. 2, Type No. 1 brackets
34′0″	6′ + 10′ + 10′ + 8′ — Type No. 1, No. 2, No. 1 brackets
36′0″	6′ + 10′ + 10′ + 10′ — Type No. 1, No. 2, No. 1 brackets
38′0″	8′ + 10′ + 10′ + 10′ — Type No. 1, No. 2, No. 1 brackets
40′0″	Four 10′ sections — Type No. 1, No. 2, No. 1 brackets at each bed joint

For the full undertrussing diagram showing bracket placement, rod positions, and cross-section detail, download the PDF.

Chart 2

Net Lift Chart.

Use these formulas and the sine/tangent table to calculate incline conveyor length and determine the net lift component for horsepower calculations.

Incline Length

Incline Length = Vertical Rise ÷ Sine of Angle

Horizontal Length

Horizontal Length = Vertical Rise ÷ Tangent of Angle

Angle	Sine	Tangent	Angle	Sine	Tangent	Angle	Sine	Tangent
1°	.02	.02	11°	.19	.20	21°	.36	.38
2°	.03	.03	12°	.21	.21	22°	.37	.40
3°	.05	.05	13°	.23	.23	23°	.39	.42
4°	.07	.07	14°	.24	.25	24°	.41	.45
5°	.09	.09	15°	.26	.27	25°	.42	.47
6°	.10	.11	16°	.28	.29	26°	.44	.49
7°	.12	.12	17°	.29	.31	27°	.45	.51
8°	.14	.14	18°	.31	.32	28°	.47	.53
9°	.16	.16	19°	.33	.34	29°	.48	.55
10°	.17	.17	20°	.34	.36	30°	.50	.58

For the original Net Lift Chart with incline length formulas formatted for field use, download the PDF.

Chart 3

Belt Pull & Horsepower Calculation.

Step-by-step methodology for calculating required belt pull and drive horsepower for ACSI belt and live roller conveyors.

Calculation Steps

I. Live Load on the Conveyor

A. Horizontal: Summation of total load being conveyed.
B. Incline: Live load on incline × sine of the angle of incline.

II. Belt or Chain Weight

A. Belt: Belt weight (lbs/ft/in of width) × belt width × conveyor length × 2 (carry + return).
B. Chain: Chain weight (lbs/ft) × conveyor length.

III. Roller / Slat Weight

See Roller Weight Chart below.
Slat Weight: 1.95 lbs per linear foot per inch of slat width.

IV. Additional Factors

A. Feeder beds: add 10% of live load on feeder bed.
B. Stopped product on running conveyor: add 10% of stopped product weight.
C. Deflectors and plows: add 33% of the heaviest unit load.

Belt Pull & HP Formulas

V. Coefficient of Friction

Slider Bed	.30
Belt on Roller	.05
Belt Driven Live Roller	.10
Chain Driven Live Roller	.075
Slat Conveyor	.15

Belt Pull = [(I + II + III + IV) × V] + I.B

VI. Effective Belt Pull

Belt Pull from Step V × 1.25

VII. Drivetrain Efficiency

Gear reduction: 100 − (ratio of each reduction ÷ 2).
Example: Single 30:1 = 100 − 15 = 85%.
Chain reduction: 95%.

Horsepower Formula

HP = (Eff. Belt Pull × Speed FPM)
÷ (33,000 × Gear Eff. × 0.95)

Belt Weight Reference

Belt Type	Weight per Linear Foot per Inch of Belt Width
3 Ply FS × FS	.10 lb
3 Ply Rough Top	.25 lb
3 Ply Neoprene	.125 lb

Chain Weight Reference

Conveyor Model	Chain Type	Weight per Linear Foot
22CRR	#50	1.38 lbs
251–267CRR	#50	3.0 lbs
251–267CRR	#60	3.52 lbs
Slat Conveyor	SR196	26.4 lbs

Roller Weight Chart (lbs per roller, by between-frame dimension)

Cat. No.	Dia.	Gage	11″	15″	19″	21″	23″	27″	31″	33″	39″
190SR	1.9″	16	2.2	2.7	3.3	3.6	3.8	4.4	4.9	5.2	6.1
20SR	2.0″	12	3.4	4.5	5.6	6.1	6.6	7.7	8.8	9.4	11.0
199SR	1.9″	9	3.4	4.5	5.6	6.1	6.6	7.7	8.8	9.4	11.0
254SR	2.5″	14	3.0	3.9	4.8	5.3	5.7	6.6	7.5	8.0	9.3
251SR	2.5″	11	5.6	7.1	8.5	8.9	9.3	11.5	12.9	13.6	15.7
267SR	2.63″	7	6.7	8.7	10.8	11.8	12.8	14.9	16.9	17.9	21.0
350SR	3.5″	.30″	14.9	19.6	24.3	26.7	29.0	33.7	38.4	40.8	47.8

For the complete Horsepower Calculation reference sheet formatted for print use, download the PDF.

Chart 4

Curve Sizing Formula & Chart.

Use the Pythagorean Theorem formula and charts below to determine the required between-frame (BF) dimension for curved conveyor sections based on carton size.

Curve Sizing Formula

BF = √[ (carton length ÷ 2)² + (carton width + inside radius)² ]
+ carton clearance − inside radius

BF Required — Curves with 2′8½″ Radius & Smaller

Package Width (in inches) across top — Package Length (in inches) down left

Pkg L \ W	4″	8″	12″	16″	20″	24″	28″	32″	36″	40″	44″	48″
4″	6	10	14	18	22	26	30	34	38	42	46	50
8″	6	10	14	18	22	26	30	34	38	42	46	50
12″	6	10	14	18	22	26	30	34	38	42	46	50
16″	7	11	15	19	22	26	30	34	38	42	46	50
20″	8	12	15	19	23	27	31	35	38	42	46	50
24″	9	12	16	20	23	27	31	35	39	43	47	51
28″	10	13	17	20	24	28	32	36	39	43	47	51
32″	11	14	18	21	25	29	32	36	40	44	48	51

BF Required — Curves with 3′7⁹⁄16″ Radius & Larger

Package Width (in inches) across top — Package Length (in inches) down left

Pkg L \ W	4″	8″	12″	16″	20″	24″	28″	32″	36″	40″	44″	48″
4″	6	10	14	18	22	26	30	34	38	42	46	50
8″	6	10	14	18	22	26	30	34	38	42	46	50
12″	6	10	14	18	22	26	30	34	38	42	46	50
16″	6	10	14	18	22	26	30	34	38	42	46	50
20″	7	10	14	18	22	26	30	34	38	42	46	50
24″	7	11	15	19	23	27	31	34	38	42	46	50
28″	8	11	15	19	23	27	31	35	39	43	47	51
32″	8	12	16	20	24	27	31	35	39	43	47	51
36″	9	13	16	20	24	28	32	36	40	43	47	51
40″	10	13	17	21	25	28	32	36	40	44	48	52
44″	10	14	18	22	25	29	33	37	41	44	48	52
48″	11	15	19	22	26	30	33	37	41	45	49	53
52″	12	16	19	23	27	30	34	38	42	46	49	53
56″	13	17	20	24	27	31	35	39	42	46	50	54
60″	14	18	21	25	28	32	36	39	43	47	51	54
64″	15	19	22	26	29	33	36	40	44	47	51	55

For the original Curve Sizing Diagram with both radius tables formatted for field use, download the PDF.

Chart 5

Box Tumbling Diagram.

Use this method to determine whether a carton will tumble on an inclined belt conveyor, and reference the gravity roller rate-of-fall chart for slope settings.

Determining Factors on Box Tumbling

Draw the conveyor angle of incline.
Draw box size on the conveyor.
Draw diagonal lines to find the center of the box.
Divide the lower portion of the box into thirds.
Draw a vertical line as shown in the diagram.
If the vertical line falls within the lower third: the box may tumble depending on weight distribution.
If the vertical line falls within the upper two-thirds: the box will not tumble.

For the full box tumbling diagram illustration, download the PDF.

Gravity Roller Rate of Fall (per 10′0″ of conveyor)

General guideline only. Exact rate of fall should be confirmed at installation with the actual product.

Product	Weight (lbs)	Fall in 10′
Cartons	1 to 5	8″ to 9″
Cartons	5 to 15	7″ to 8″
Cartons	15 to 50	6″ to 7″
Cartons	50 to 75	5″ to 6″
Wood Boxes	20 to 50	5″ to 6″
Wood Boxes	50 to 150	4″ to 5″
Wood Boxes	150 to 200	3″ to 4″
Steel Tote Bins	15 to 50	3″ to 4″

Chart 6

Noseover Arrangements.

Minimum bed lengths and angular adjustment ranges for standard noseover and double noseover configurations across belt conveyor models.

Model	Arrangement	Min. Bed	Angle Range	Min. Overall
190RB	Noseover, End Drive	3′0″	0°–30°	3′7½″
190RB	Double Noseover, End Drive	3′0″	0°–15° each	3′7½″
LPB	Noseover, End Drive	1′6″	0°–30°	2′1½″
LPB	Double Noseover, End Drive	1′0″	0°–15° each	1′5″
LPB	Noseover, Tail End	1′0″	0°–15°	1′5″
TSB	Noseover, End Drive	2′6″	0°–30°	3′1½″
TSB	Double Noseover, End Drive	1′0″	0°–15° each	1′5″
FTC & HPB	Noseover, End Drive	1′4″	0°–30°	1′11½″
FTC & HPB	Double Noseover, End Drive	1′4″	0°–15° each	1′9″
FTC & HPB	Noseover, Tail End	1′6″	0°–15°	2′1½″

For detailed dimension drawings of each noseover arrangement including drive and tail end configurations, download the PDF.

Engineering Reference Library.

Select a Reference Chart.

Bed & Undertrussing Chart

Net Lift Chart

Engineering Calculations

Curve Sizing Diagram

Box Tumbling Diagram

Noseover Arrangements

Bed & Undertrussing Chart.

Rod Sizes

Net Lift Chart.

Belt Pull & Horsepower Calculation.

Calculation Steps

Belt Pull & HP Formulas

Belt Weight Reference

Chain Weight Reference

Roller Weight Chart (lbs per roller, by between-frame dimension)

Curve Sizing Formula & Chart.

BF Required — Curves with 2′8½″ Radius & Smaller

BF Required — Curves with 3′7⁹⁄16″ Radius & Larger

Box Tumbling Diagram.

Determining Factors on Box Tumbling

Gravity Roller Rate of Fall (per 10′0″ of conveyor)

Noseover Arrangements.

Every System Custom-Designed.

Engineering Reference Library.

Select a Reference Chart.

Bed & Undertrussing Chart

Net Lift Chart

Engineering Calculations

Curve Sizing Diagram

Box Tumbling Diagram

Noseover Arrangements

Bed & Undertrussing Chart.

Rod Sizes

Net Lift Chart.

Belt Pull & Horsepower Calculation.

Calculation Steps

Belt Pull & HP Formulas

Belt Weight Reference

Chain Weight Reference

Roller Weight Chart (lbs per roller, by between-frame dimension)

Curve Sizing Formula & Chart.

BF Required — Curves with 2′8½″ Radius & Smaller

BF Required — Curves with 3′79⁄16″ Radius & Larger

Box Tumbling Diagram.

Determining Factors on Box Tumbling

Gravity Roller Rate of Fall (per 10′0″ of conveyor)

Noseover Arrangements.

Every System Custom-Designed.

BF Required — Curves with 3′7⁹⁄16″ Radius & Larger