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40BB18H 5/8 PITCH: #40 TEETH: 18 Bore: 5/8 INCH

$33.55 Each


  • Typically ships in: 1 day
  • Weight: 0.6 lb
  • Free shipping on orders over $20

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Additional Description

Martin idlers are smooth-running and available in oil-impregnated, sintered bronze, extra-duty bearing press-fitted in sprocket and a hardened steel journal case for maximum resistance to wear. Steel sprockets used in Martin idlers are accurately machined (not stamped) the same as sprockets normally supplied for power transmission use. Martin can also alter existing sprockets and install bearings to make custom idlers.
Material Steel Single Strand Tooth Thickness 0.284 in.
Chain Number 40 Hardened Teeth Yes
Chain Pitch 0.500 in. Hub Outside Diameter 2.032 in.
Number of Chain Rows 1 Length thru Bore 0.487 in.
Number of Teeth 18 Hub Recessed For Chain Clearance No
Outside Diameter 3.140 in. Bore Type Bearing
Pitch Diameter 2.879 in.
Storage Dimension Length 3.188 in. Weight 0.55 lbs.
Storage Dimension Width 3.188 in. Individually Packaged Yes
Storage Dimension Height 0.750 in.


Number Of Teeth 18
Outside Dia 3.140"
Material Steel
Pitch 0.500 in.

Return policy

Item must be unused.

Item must be in it's original package.

Restocking, shipping and handling fees may apply to any return with this manufacturer.

For more information please consult


Product's availability

State of California Proposition 65 Product Warning