Gears - Spur - Standard - 12DP Steel - 20 Deg PA

Gears -> Spur -> Standard -> 12DP Steel -> 20 Deg PA

There is only 1 product in the sub-categories of Gears - Spur - Standard - 12DP Steel - 20 Deg PA. Browse the Gears - Spur - Standard - 12DP Steel - 20 Deg PA products table.

Category Details

A selection of 20 Deg PA 12DP Steel Standard Spur Gears. PCD in mm = No. of Teeth x 2.117 (1/12 in.). 20 Degree Pressure Angle. DP stands for Diametrical Pitch and is an imperial measurement system.

  • The diameter increases by 1 inch for every 12 teeth
  • 12 Diametrical Pitch. Approx 6.65mm between the teeth.

Miniature Bearings Australia - MBA Minibearings

Additional resources:


A more concise listing may be found in the Gears - Spur - Standard - 12DP Steel - 20 Deg PA category on the Small Parts & Bearings online store.
Number of Teeth Pitch Circle Diameter (PD) Bore (d) Outside Diameter (OD) Face Width (FW) Type Indicative
Image
Number of Teeth
120

Pitch Circle Diameter (PD)
255.0
mm

(Equiv. 10.039 in.)
Bore (d)
25.4
mm

(Equiv. 1 in.)
Face Width (FW)
25.4
mm
Type
Hubbed
Spur Gears - 120 tooth - 255x25.4 mm Hubbed - Cast Iron ASTM-CLASS 30 Gear
Material: Cast Iron ASTM-CLASS 30    Hub Diameter (D1): 63.5 mm    Hub Projection (HL): 22.35 mm    Locking Method: None    Quality: Commercial   
Part Number: G255B-120-D12-254-254-CI-G
Spur Gears - 120 tooth - 255x25.4 mm Hubbed - Cast Iron ASTM-CLASS 30 Gear
Out of Stock | Backorder Now | Orders can be expected around Wed, Sep 17, 2025
$1,191.86 AUD
$1,430.24 AUD $1,191.86 AUD
Each
Quantity Required

Backorder: Out of Stock.
Number of Teeth Pitch Circle Diameter (PD) Bore (d) Outside Diameter (OD) Indicative
Image
Number of Teeth
120

Pitch Circle Diameter (PD)
255.0
mm

(Equiv. 10.039 in.)
Bore (d)
25.4
mm

(Equiv. 1 in.)
Spur Gears - 120 tooth - 255x25.4 mm Hubbed - Cast Iron ASTM-CLASS 30 Gear
Material: Cast Iron ASTM-CLASS 30    Face Width (FW): 25.4 mm    Type: Hubbed    Hub Diameter (D1): 63.5 mm    Hub Projection (HL): 22.35 mm    Locking Method: None    Quality: Commercial   
Part Number: G255B-120-D12-254-254-CI-G
Spur Gears - 120 tooth - 255x25.4 mm Hubbed - Cast Iron ASTM-CLASS 30 Gear
Out of Stock | Backorder Now | Orders can be expected around Wed, Sep 17, 2025
$1,191.86 AUD
$1,430.24 AUD $1,191.86 AUD
Each
Quantity Required

Backorder: Out of Stock.