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Type A Plain Bore Sprockets

Type A plain bore sprockets are flat-profile roller chain sprockets without a hub or keyway designed for power transmission systems and machinery. They allow easy customization and machining to fit the desired shaft size and configuration, commonly used in various industrial applications, such as conveyor systems, material handling equipment, and agricultural machinery. Selection of the appropriate type A plain bore sprocket is crucial for optimal performance, efficiency, and longevity of the power transmission system.
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#258494
100A12
Martin 100A12 Type A Plain Bore roller chain sprocket for #100 chain (1-1/4" pitch). 12 teeth, steel construction, flat plate design with no hub. Outside diameter: 5.415". Weight: 3.0 lbs.
Brand Martin Sprocket
Model 100A12
$72.81 Each
Free shipping
#258496
100A14
Martin 100A14 Type A (Plain Bore) roller chain sprocket for #100 chain (1-1/4" pitch). 14 teeth, steel construction, flat plate design with no hub. Outside diameter: 6.227". Weight: 4.1 lbs.
Brand Martin Sprocket
Model 100A14
$74.52 Each
Free shipping
#258506
100A20
Martin 100A20 Type A Plain Bore roller chain sprocket for #100 chain (1-1/4" pitch). 20 teeth, steel construction, flat plate design with no hub. Outside diameter: 8.642". Weight: 8.8 lbs.
Brand Martin Sprocket
Model 100A20
$89.75 Each
Free shipping
#258520
100A32
Martin 100A32 Type A Plain Bore roller chain sprocket for #100 chain (1-1/4" pitch). 32 teeth, flat plate design with no hub. Steel construction. Outside diameter: 13.441". Weight: 22.6 lbs.
Brand Martin Sprocket
Model 100A32
$192.37 Each
Free Shipping orders over $100
#258528
100A40
Martin 100A40 Type A (Plain Bore) roller chain sprocket for #100 chain (1-1/4" pitch). 40 teeth, steel construction, flat plate design with no hub. Outside diameter: 16.633". Weight: 36 lbs.
Brand Martin Sprocket
Model 100A40
$316.18 Each
Free Shipping orders over $100
#258533
100A45
Martin 100A45 Type A (Plain Bore) roller chain sprocket for #100 chain (1-1/4" pitch). 45 teeth, steel construction, flat plate design with no hub. Outside diameter: 18.626". Weight: 47 lbs.
Brand Martin Sprocket
Model 100A45
$393.15 Each
Free Shipping orders over $100
#258548
100A60
Martin 100A60 Type A Plain Bore roller chain sprocket for #100 chain (1-1/4" pitch). 60 teeth, steel construction, flat plate design with no hub. Outside diameter 24.601", weight 80 lbs. For light-duty power transmission applications.
Brand Martin Sprocket
Model 100A60
$556.85 Each
Free Shipping orders over $100
#259055
120A20
Martin 120A20 Type A (Plain Bore) roller chain sprocket for #120 chain (1-1/2" pitch). 20 teeth, flat plate design with no hub. Steel construction. Outside diameter: 10.371". Weight: 16.9 lbs.
Brand Martin Sprocket
Model 120A20
$210.64 Each
Free Shipping orders over $100
#259064
120A30
Martin 120A30 Type A (Plain Bore) roller chain sprocket for #120 chain (1-1/2" pitch), 30 teeth, steel construction. Flat plate design with no hub, suitable for light-duty applications. Outside diameter: 15.172", weight: 39 lbs.
Brand Martin Sprocket
Model 120A30
$351.01 Each
Free Shipping orders over $100
#259074
120A54
Martin 120A54 Type A (Plain Bore) roller chain sprocket for #120 chain (1-1/2" pitch). 54 teeth, flat plate design with no hub. Steel construction. Suitable for light-duty applications where weight savings is a priority.
Brand Martin Sprocket
Model 120A54
$826.50 Each
Free Shipping orders over $100
#259080
120A90
Martin 120A90 Type A (Plain Bore) roller chain sprocket for #120 chain (1-1/2" pitch). 90 teeth, steel construction, flat plate design with no hub. Outside diameter: 43.854", weight: 358 lbs.
Brand Martin Sprocket
Model 120A90
$2,340.59 Each
Free Shipping orders over $100
#259364
140A45
Martin 140A45 Type A (Plain Bore) roller chain sprocket for #140 chain (1-3/4" pitch). 45 teeth, flat plate design with no hub. Steel construction. Outside diameter: 26.076". Weight: 131 lbs.
Brand Martin Sprocket
Model 140A45
$801.01 Each
Free Shipping orders over $100
#260769
35A112
Martin 35A112 Type A (Plain Bore) roller chain sprocket for #35 chain (3/8" pitch), 112 teeth, steel construction. Flat plate design with no hub for lightest weight applications. Outside diameter: 13.591", weight: 6.1 lbs. Compatible with ANSI B29.1
Brand Martin Sprocket
Model 35A112
$80.48 Each
Free shipping
#260792
35A45SS
Martin 35A45SS stainless steel Type A plain bore roller chain sprocket for #35 chain (3/8" pitch). 45 teeth, 5.588" OD, 1.030 lb. Corrosion-resistant 304 SS construction for washdown or harsh environments.
Brand Martin Sprocket
Model 35A45SS
$294.72 Each
Free Shipping orders over $100
#260795
35A60
Martin 35A60 Type A (Plain Bore) roller chain sprocket for #35 chain (3/8 in. pitch). 60 teeth, 7.380" outside diameter, steel construction. Flat plate design with no hub, ideal for light-duty applications where weight and space are critical.
Brand Martin Sprocket
Model 35A60
$37.80 Each
Free shipping
#260798
35A72
Martin 35A72 Type A (Plain Bore) roller chain sprocket for #35 chain (3/8" pitch). 72 teeth, flat plate design with no hub for light-duty applications. Steel construction. Outside diameter: 8.814". Weight: 2.5 lbs.
Brand Martin Sprocket
Model 35A72
$43.04 Each
Free shipping
#260801
35A96
Martin 35A96 Type A (Plain Bore) roller chain sprocket for #35 chain (3/8" pitch). 96 teeth, 11.680" outside diameter, steel construction. Flat plate design with no hub, suitable for light-duty power transmission applications.
Brand Martin Sprocket
Model 35A96
$64.74 Each
Free shipping
#261211
40A112
Martin 40A112 Type A (Plain Bore) roller chain sprocket for #40 chain (1/2" pitch). 112 teeth, flat plate design with no hub. Steel construction, outside diameter 18.121".
Read 1 review
Brand Martin Sprocket
Model 40A112
$136.57 Each
Free Shipping orders over $100
#261212
40A12
Martin 40A12 Type A Plain Bore Roller Chain Sprocket for #40 chain (1/2" pitch). 12 teeth, flat plate design with no hub. Steel construction. Outside diameter: 2.166". Weight: 0.17 lbs.
Brand Martin Sprocket
Model 40A12
$22.06 Each
Free shipping
#261220
40A20
Martin 40A20 Type A (Plain Bore) roller chain sprocket for #40 chain (1/2 in. pitch). 20 teeth, 3.457" outside diameter, steel construction. Flat plate design with no hub, ideal for light-duty applications where weight and space are critical.
Brand Martin Sprocket
Model 40A20
$25.69 Each
Free shipping
#261260
40A54
Martin 40A54 Type A (Plain Bore) roller chain sprocket for #40 chain (1/2" pitch). 54 teeth, steel construction, flat plate design with no hub. Outside diameter 8.885", weight 4.44 lbs.
Brand Martin Sprocket
Model 40A54
$51.19 Each
Free shipping
#261266
40A60
Martin 40A60 Type A (Plain Bore) roller chain sprocket for #40 chain (1/2" pitch). 60 teeth, steel construction, flat plate design with no hub. Outside diameter: 9.841". Weight: 5.48 lbs.
Brand Martin Sprocket
Model 40A60
$57.50 Each
Free shipping
#261269
40A72
Martin 40A72 Type A Plain Bore roller chain sprocket for #40 chain (1/2" pitch). 72 teeth, steel construction, flat plate design with no hub. Outside diameter: 11.752", weight: 7.74 lbs.
Brand Martin Sprocket
Model 40A72
$70.70 Each
Free shipping
#261270
40A80
Martin 40A80 Type A Plain Bore Roller Chain Sprocket for #40 chain (1/2" pitch), 80 teeth, steel construction. Flat plate design with no hub, lightest weight option. Outside diameter: 13.026". For ANSI B29.1 standard roller chain drives.
Brand Martin Sprocket
Model 40A80
$87.35 Each
Free shipping
#261271
40A84
Martin 40A84 Type A (Plain Bore) roller chain sprocket for #40 chain (1/2 in. pitch). 84 teeth, flat plate design with no hub. Steel construction. Outside diameter: 13.663". Weight: 10.34 lbs.
Brand Martin Sprocket
Model 40A84
$76.52 Each
Free shipping
#261272
40A96
Martin 40A96 Type A (Plain Bore) roller chain sprocket for #40 chain (1/2" pitch). 96 teeth, steel construction, flat plate design with no hub. Outside diameter: 15.573". Weight: 13.52 lbs.
Brand Martin Sprocket
Model 40A96
$97.66 Each
Free shipping
#262192
41A84
Martin 41A84 Type A (Plain Bore) roller chain sprocket for #41 chain (1/2" pitch). 84 teeth, flat plate design with no hub. Steel construction. Outside diameter: 13.663". Weight: 9.12 lbs.
Brand Martin Sprocket
Model 41A84
$78.85 Each
Free shipping
#262468
50A112
Martin 50A112 Type A Plain Bore roller chain sprocket for #50 chain (5/8" pitch). 112 teeth, steel construction, flat plate design with no hub. Outside diameter: 22.651". Weight: 37.7 lbs.
Brand Martin Sprocket
Model 50A112
$216.51 Each
Free Shipping orders over $100
#262474
50A17
Martin 50A17 Type A (Plain Bore) roller chain sprocket for #50 chain (5/8" pitch). 17 teeth, steel construction, flat plate design with no hub. Outside diameter: 3.718", weight: 0.76 lb. For light-duty drives where weight and space are critical.
Brand Martin Sprocket
Model 50A17
$28.20 Each
Free shipping
#262512
50A45
Martin 50A45 Type A (Plain Bore) roller chain sprocket for #50 chain (5/8" pitch). 45 teeth, 9.313" outside diameter, steel construction. Flat plate design with no hub for lightweight applications.
Brand Martin Sprocket
Model 50A45
$56.43 Each
Free shipping
#262513
50A45SS
Martin 50A45SS stainless steel Type A plain bore roller chain sprocket for #50 chain (5/8" pitch). 45 teeth, 9.313" OD, flat plate design with no hub. 304 stainless steel construction for corrosion resistance.
Brand Martin Sprocket
Model 50A45SS
$540.39 Each
Free Shipping orders over $100
#262516
50A48
Martin 50A48 Type A (Plain Bore) roller chain sprocket for #50 chain (5/8" pitch), 48 teeth, steel construction. Flat plate design with no hub for lightweight applications. Outside diameter: 9.911". Weight: 6.58 lbs.
Brand Martin Sprocket
Model 50A48
$59.50 Each
Free shipping
#262528
50A60
Martin 50A60 Type A (Plain Bore) roller chain sprocket for #50 chain (5/8" pitch). Features 60 teeth, a flat plate design with no hub for light-weight applications, and is manufactured from durable steel. Outside diameter is 12.301". A cost-effective
Brand Martin Sprocket
Model 50A60
$78.85 Each
Free shipping
#262531
50A72
Martin 50A72 Type A Plain Bore Roller Chain Sprocket for #50 chain (5/8" pitch). Features 72 teeth, a flat plate design with no hub for light weight, and is manufactured from steel. Outside diameter is 14.690". A-plate sprockets are commonly used as
Brand Martin Sprocket
Model 50A72
$85.27 Each
Free shipping
#262534
50A84
Martin 50A84 is a Type A (Plain Bore) roller chain sprocket for #50 chain (5/8" pitch) with 84 teeth. This flat plate, no-hub sprocket is made of steel, has an outside diameter of 17.078", and weighs 22.08 lbs. It is designed for light-duty applications
Brand Martin Sprocket
Model 50A84
$119.07 Each
Free Shipping orders over $100
#262536
50A96
Martin 50A96 Type A (Plain Bore) roller chain sprocket for #50 chain (5/8" pitch). Features 96 teeth, a flat plate design with no hub for light weight, and is made of steel. Outside diameter is 19.467". Requires finishing to a specific bore size.
Brand Martin Sprocket
Model 50A96
$154.72 Each
Free Shipping orders over $100
#263527
60A112
Martin 60A112 Type A (Plain Bore) roller chain sprocket for #60 chain (3/4" pitch). Features 112 teeth, a flat plate design with no hub for light-weight applications, and is manufactured from durable steel. Outside diameter is 27.181".
Brand Martin Sprocket
Model 60A112
$368.88 Each
Free Shipping orders over $100
#263531
60A15
Martin 60A15 Type A Plain Bore roller chain sprocket for #60 chain (3/4" pitch). Features 15 teeth, a flat plate (Type A) design with no hub for light-duty applications, and is manufactured from durable steel. Outside diameter is 3.978".
Brand Martin Sprocket
Model 60A15
$33.09 Each
Free shipping
#263536
60A20
Martin 60A20 Type A Plain Bore roller chain sprocket for #60 chain (3/4" pitch). Features 20 teeth, a flat plate (Type A) design with no hub for light-duty applications, and is manufactured from durable steel. Outside diameter is 5.185".
Brand Martin Sprocket
Model 60A20
$39.06 Each
Free shipping
#263575
60A48
Martin 60A48 Type A Plain Bore roller chain sprocket for #60 chain (3/4" pitch). Features 48 teeth, a flat plate (Type A) design with no hub for light-weight applications, and is manufactured from durable steel. Outside diameter is 11.893" and weight is
Brand Martin Sprocket
Model 60A48
$84.81 Each
Free shipping
#263579
60A52
Martin 60A52 Type A (Plain Bore) roller chain sprocket for #60 chain (3/4" pitch). Features 52 teeth, a flat plate design with no hub for light-weight applications, and is manufactured from durable steel. Outside diameter is 12.849".
Brand Martin Sprocket
Model 60A52
$82.34 Each
Free shipping
#263587
60A60
Martin 60A60 Type A Plain Bore roller chain sprocket for #60 chain (3/4" pitch). Features 60 teeth, a flat plate (Type A) design with no hub for light-weight applications, and is manufactured from durable steel. Outside diameter is 14.761".
Brand Martin Sprocket
Model 60A60
$102.46 Each
Free Shipping orders over $100
#263594
60A72
Martin 60A72 Type A (Plain Bore) roller chain sprocket for #60 chain (3/4" pitch). Features 72 teeth, a flat plate design with no hub for light-duty applications, and is manufactured from durable steel. Outside diameter is 17.628".
Brand Martin Sprocket
Model 60A72
$166.45 Each
Free Shipping orders over $100
#263596
60A80
Martin 60A80 Type A Plain Bore roller chain sprocket for #60 chain (3/4" pitch). Features 80 teeth, a flat plate design with no hub for light-weight applications, and is manufactured from durable steel. Outside diameter is 19.539".
Brand Martin Sprocket
Model 60A80
$202.52 Each
Free Shipping orders over $100
#263598
60A90
Martin 60A90 Type A (Plain Bore) roller chain sprocket for #60 chain (3/4" pitch). Features 90 teeth, a flat plate design with no hub for light-weight applications, and is manufactured from durable steel. Outside diameter is 21.927".
Brand Martin Sprocket
Model 60A90
$288.28 Each
Free Shipping orders over $100
#263599
60A96
Martin 60A96 Type A (Plain Bore) roller chain sprocket for #60 chain (3/4" pitch). Features 96 teeth, a 23.360" outside diameter, and is manufactured from steel. This flat plate sprocket is a lightweight solution for standard power transmission
Brand Martin Sprocket
Model 60A96
$298.57 Each
Free Shipping orders over $100
#264772
80A112
Martin 80A112 Type A (Plain Bore) roller chain sprocket for #80 chain (1" pitch). Features 112 teeth, a flat plate design with no hub for light-weight applications, and is manufactured from durable steel. Outside diameter is 36.241".
Brand Martin Sprocket
Model 80A112
$918.43 Each
Free Shipping orders over $100
#264777
80A16
Martin 80A16 is a Type A (Plain Bore) roller chain sprocket for #80 chain (1" pitch) with 16 teeth. This flat plate sprocket, made from steel, has an outside diameter of 5.627" and is designed for light-duty applications where a hub is not required.
Brand Martin Sprocket
Model 80A16
$45.39 Each
Free shipping
#264781
80A20
Martin 80A20 Type A Plain Bore Roller Chain Sprocket for #80 chain (1" pitch). Features 20 teeth, a flat plate design with no hub for light-duty applications, and is manufactured from durable steel. Ideal for simple, low-clearance drives.
Brand Martin Sprocket
Model 80A20
$62.07 Each
Free shipping
#264797
80A30
Martin 80A30 Type A Plain Bore Roller Chain Sprocket for #80 chain (1" pitch). Features 30 teeth, a flat plate (Type A) design with no hub for light-weight applications, and is manufactured from durable steel. Outside diameter is 10.114".
Brand Martin Sprocket
Model 80A30
$76.43 Each
Free shipping
#264805
80A36
Martin 80A36 Type A (Plain Bore) roller chain sprocket for #80 chain (1" pitch). Features 36 teeth, a flat plate design with no hub for light-weight applications, and is manufactured from steel. Outside diameter is 12.030" and weight is 16.1 lbs.
Brand Martin Sprocket
Model 80A36
$105.42 Each
Free Shipping orders over $100
#264809
80A40
Martin 80A40 Type A (Plain Bore) roller chain sprocket for #80 chain (1" pitch). Features 40 teeth, a flat plate design with no hub for light weight, and is manufactured from steel. Outside diameter is 13.306" and weight is 18.98 lbs.
Brand Martin Sprocket
Model 80A40
$126.96 Each
Free Shipping orders over $100
#264818
80A48
Martin 80A48 Type A Plain Bore roller chain sprocket for #80 chain (1" pitch). Features 48 teeth, a flat plate (Type A) design with no hub for light weight, and is made of steel. Outside diameter is 15.857". Requires finishing to a specific bore size.
Brand Martin Sprocket
Model 80A48
$183.48 Each
Free Shipping orders over $100
#264820
80A50
Martin 80A50 Type A Plain Bore Roller Chain Sprocket for #80 chain (1" pitch). Features 50 teeth, 16.495" outside diameter, and a flat plate (Type A) design with no hub for light-duty applications. Made from durable steel with a weight of 30.88 lbs.
Brand Martin Sprocket
Model 80A50
$237.48 Each
Free Shipping orders over $100
#264825
80A55
Martin 80A55 Type A Plain Bore roller chain sprocket for #80 chain (1" pitch). Features 55 teeth, 18.088" outside diameter, and a flat plate (Type A) design with no hub for light-duty applications. Made from durable steel.
Brand Martin Sprocket
Model 80A55
$252.06 Each
Free Shipping orders over $100
#264830
80A60
Martin 80A60 Type A Plain Bore roller chain sprocket for #80 chain (1" pitch). Features 60 teeth, a flat plate (Type A) design with no hub for light-weight applications, and is manufactured from durable steel. Outside diameter is 19.681".
Brand Martin Sprocket
Model 80A60
$291.33 Each
Free Shipping orders over $100
#264832
80A70
Martin 80A70 Type A (Plain Bore) roller chain sprocket for #80 chain (1" pitch). Features 70 teeth, a flat plate design with no hub for light-weight applications, and is manufactured from durable steel. Outside diameter is 22.867".
Brand Martin Sprocket
Model 80A70
$388.33 Each
Free Shipping orders over $100
#264835
80A80
Martin 80A80 Type A Plain Bore roller chain sprocket for #80 chain (1" pitch). Features 80 teeth, a flat plate (Type A) design with no hub for light weight, and is made of steel. Outside diameter is 26.052" and weight is 79.58 lbs.
Brand Martin Sprocket
Model 80A80
$477.07 Each
Free Shipping orders over $100
#264838
80A90
Martin 80A90 Type A (Plain Bore) roller chain sprocket for #80 chain (1" pitch). Features 90 teeth, a 29.236" outside diameter, and is constructed from steel. This flat plate, hubless sprocket is a lightweight option for standard power transmission
Brand Martin Sprocket
Model 80A90
$604.00 Each
Free Shipping orders over $100
#566290
100A25H
Linn-Gear 100A25H Hardened Sprocket H1
Read 1 review
Brand Linn Gear
Model 100A25H
$131.30 Each
Free Shipping orders over $100