Specifications of #40 Chain Idler Sprocket
Ball Bearing Idler Sprocket

Z |
Pitch |
de |
dp |
A |
D1 |
F |
B |
H |
Chain Size |
18 |
1/2"×1/8" |
78.9 |
73.14 |
3 |
16 |
40 |
12 |
18.3 |
#40 |
18 |
1/2"×3/16" |
78.9 |
73.13 |
4.5 |
16 |
40 |
12 |
18.3 |
#40 |
16 |
1/2"×5/16" |
69.5 |
65.1 |
7.2 |
16 |
40 |
12 |
18.3 |
#40 |
18 |
1/2"×5/16" |
77.8 |
73.14 |
7.2 |
16 |
40 |
12 |
18.3 |
#40 |
Needle Bearing Idler Sprocket

Sprocket Size |
Number Of Teeth |
Bearing Type |
Chain Size |
Outside Diameter |
Bore Size |
Length Thru Bore |
Dimension (T) |
Hub Diameter |
Weight |
40NB19H |
19 |
Needle Bearing |
#40 |
3.29" |
1.00" |
1.00" |
0.284" |
2.50" |
1.10 LBS |
Bronze Bearing Idler Sprocket

Sprocket Size |
Number Of Teeth |
Bearing Type |
Chain Size |
Outside Diameter |
Bore Size |
Length Thru Bore |
Dimension (T) |
Hub Diameter |
Weight |
40BR13 |
13 |
Bronze Bearing |
#40 |
2.33" |
1/2" |
0.94" |
0.284" |
1.56" |
0.50 LBS |
40BR19 |
19 |
Bronze Bearing |
#40 |
3.29" |
7/8" |
1.06" |
0.284" |
2.50" |
1.25 LBS |
Bronze Bushed Idler Sprocket

Sprocket Size |
Number Of Teeth |
Chain Size |
Outside Diameter |
Bore Size |
Weight |
41E15 |
15 |
#41 - #40 |
2.65" |
1/2" |
0.50 LBS |
Application Scenarios of #40 Chain Idler Sprocket
The #40 Chain Idler Sprocket is a versatile component used in various industrial applications:
- Conveyor Systems: It helps guide and maintain the tension of the chain, ensuring smooth operation.
- Agricultural Equipment: Commonly found in tractors and harvesters, facilitating efficient power transmission.
- Material Handling Equipment: Utilized in forklifts and pallet jacks to enhance movement and control of loads.

Comparison of Different Idler Sprocket Types
The #40 Chain Idler Sprocket is available with various bearing types, each offering unique advantages. Ball bearings provide smooth rotation and are ideal for high-speed applications, reducing friction and wear. Needle bearings, on the other hand, excel in handling radial loads in compact spaces, making them suitable for heavy loads without increas