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Black oxide steel sprocket with 17 teeth, taper-lock hub, single-strand chain size 40

Tsubaki

Tsubaki 40BTL17 Sprocket 40 Chain 17 Teeth

SKU CH-NPR2-T2SR2

Steel sprocket for #40 chain with 17 teeth and 1 1/4 in taper-lock bore

  • 17-tooth design matches #40 chain pitch precisely
  • 1045 steel construction resists wear under load
  • Black oxide finish protects against corrosion
  • Taper-lock 1210 bushing enables quick shaft mounting
  • 975 in outside diameter fits compact drives

17-Tooth #40 Sprocket for Taper-Lock Bushings

The Tsubaki 40BTL17 is a single-strand steel sprocket cut for #40 roller chain with a 1/2-inch pitch. It carries 17 hardened teeth and is finished in black oxide for corrosion resistance. The hub accepts a 1210 taper-lock bushing and is machined to a 1 1/4-inch minimum and maximum bore. This component suits maintenance teams and OEMs replacing worn drive sprockets on conveyors, packaging lines or agricultural equipment.

Chain Pitch and Bushing Interface Limits

The sprocket is engineered for a fixed 1/2-inch chain pitch and single-strand #40 chain only; multi-strand or different-pitch chains will not engage correctly. Power capacity is governed by the 1045 steel tooth geometry and the 1210 taper-lock interface, which transmits torque through friction rather than a keyway. The 2.721-inch pitch diameter and 2.975-inch outside diameter set the speed ratio and clearance envelope, so verify shaft speed and guard spacing before specifying.

Taper-Lock Installation and Common Issues

Mounting requires a 1210 taper-lock bushing (sold separately) seated in the 2 3/8-inch hub with a 0.716-inch projection and 1-inch length through bore. Clean the shaft and bore thoroughly, tighten the bushing screws incrementally in a star pattern to the manufacturer’s torque value, and re-check after the first run-in period. The most frequent problems are using an incorrect bushing size, under-torquing the locking screws, or allowing debris between tapered surfaces, any of which can cause slippage or fretting corrosion.

Highlights

  • 17-tooth design matches #40 chain pitch precisely
  • 1045 steel construction resists wear under load
  • Black oxide finish protects against corrosion
  • Taper-lock 1210 bushing enables quick shaft mounting
  • 975 in outside diameter fits compact drives

Specifications

No published specifications for this item yet.

Questions about this item

Should I choose the 17-tooth or a different tooth count for my #40 chain drive?

Select the 17-tooth version when your design requires a 2.721 in pitch diameter and 2.975 in outside diameter; other tooth counts will change both diameters and the resulting speed ratio.

What does the 2.721 in pitch diameter mean once the sprocket is mounted on a shaft?

It sets the effective radius where the #40 chain engages, so the driven shaft turns at a speed ratio of 17 teeth to the driver sprocket's tooth count.

How does the 1210 taper-lock interface limit the bore size I can use?

The 1210 bushing accepts a maximum bore of 1 1/4 in, so the sprocket cannot be fitted to a shaft larger than that diameter.

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