LiftMaster 15-100B15TKK Sprocket, 100B15T, 1-1/2 in Bore
The LiftMaster 15-100B15TKK is a large commercial drive sprocket identified by the 100B15T specification. It is designed for #100 roller chain systems, which are used on heavier, higher-torque commercial and industrial operator drivetrains. The 15-tooth layout helps transfer motor and gear reducer torque into the chain drive while maintaining the correct ratio for the operator.
This is not a general-purpose sprocket for any LiftMaster operator. The #100 chain size, 15-tooth count, and 1-1/2 inch bore must match the operator diagram and shaft. On high-horsepower systems, incorrect sprocket selection can overload chains, shafts, bearings, and reducers.
Compatible With / Common Applications
Known compatibility and common applications include select high-capacity LiftMaster commercial operator diagrams that call for 15-100B15TKK or a matching 100B15T sprocket:
- LiftMaster GH Series high-horsepower industrial-duty gearhead operator references
- LiftMaster GT Series high-horsepower industrial-duty gearhead trolley references
- Logic 5.0 and Logic 4.0 high-horsepower industrial operator diagrams using #100 roller chain
- Select 3 HP and larger commercial gearhead applications where the diagram calls for 100B15T sizing
- Heavy rolling steel, industrial sectional, and large commercial door operator drivetrains using compatible #100 chain
- Not interchangeable with #48, #50, #60, or smaller chain sprockets
- Not interchangeable with different bore or tooth-count sprockets
Features and Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Heavy-duty commercial operator drive sprocket |
| Part Number | 15-100B15TKK |
| Sprocket Designation | 100B15T |
| Chain Size | #100 roller chain |
| Tooth Count | 15 teeth |
| Bore | 1-1/2 inch |
| Sprocket Type | Type B hub-style sprocket |
| Application | High-torque drive transfer on compatible industrial operator chain systems |
| Notes | Verify bore, chain size, and tooth count before ordering |
Also Known As / Related Part Numbers
- 15-100B15TKK
- 15-100B15T
- 100B15TKK
- 100B15T
- 100B15T 1-1/2 bore
- LIF-15-100B15TKK
- LM-15-100B15TKK
- 15 tooth #100 chain sprocket
- Related smaller-chain sprocket family: 15-48B18TKK
Technician Note
This sprocket is used in high-load systems. If the old sprocket teeth are hooked or the chain is tight in some spots and loose in others, inspect the entire chain path and bearings before installing the new part.
Before Ordering
- Confirm the operator uses #100 roller chain.
- Confirm 15-tooth sprocket count.
- Measure the shaft bore at 1-1/2 inch.
- Check the keyway and set-screw arrangement.
- Verify the operator diagram calls for 15-100B15TKK or 100B15T.
Professional Advisory
High-load chain drive work can be dangerous if chain tension is released unexpectedly. Use a qualified commercial door technician to secure the door, release tension properly, and align the sprocket.
Product Questions and Answers
What chain size is this sprocket for?
It is for #100 roller chain applications.
What does 100B15T mean?
It identifies a #100 chain, Type B hub sprocket with 15 teeth.
What bore size does it have?
This listing is for the 1-1/2 inch bore version.
No. 15-48B18TKK is a #48 chain sprocket with a different chain size, tooth count, and bore.
What operators commonly use this sprocket?
It is commonly associated with select high-horsepower LiftMaster GH and GT industrial operator diagrams using #100 chain.
