TSUBAKI Timing Pulleys
Fit Bores
Quick delivery of timing pulleys with finished bores.
Available products
Finished Bore Type (Immediate shipment)
P5M, P8M
Easy Finished Bore Type (Quick delivery)
P5M, P8M, P14M, XL, L, H
What is Fit Bore?
Smooth
We have created codes for the different types of finishing for easy ordering by model number.
Smart
Customers do not need to create drawings when ordering. We can also issue drawings for confirming specifications.
Speedy
We deliver products quickly. After a product arrives, it can be used as is.
List of models affected/details
- Standard stock PX Pulleys (P5M, P8M, P14M)
*Only models made from carbon steel for machine structural use. - Standard stock trapezoidal tooth pulleys (XL, L, H)
Finishing Bore Type
Finished Bore types have standardized shaft bore, key, and tap finishings. You can order this pulley for immediate delivery with just a model number.
Easy Finished Bore Types
Easy Finished Bore Types are standard stock pulleys that have been finished by Tsubaki. The shaft bore, key, taps, and surface treatment have been standardized. These models can be delivered quickly thanks to their simple notation.
Finishing specifications
Ordering is easier and more convenient thanks to notation for short delivery and finishing.
Bore Finishing
| Shaft bore tolerance | Shaft bore diameter | Chamfer amount |
|---|---|---|
|
Three-digit notation Integer (mm) |
|
Tsubaki standard chamfer is 0.5 mm across the board.
Keyway Finishing
| Keyway tolerance | Keyway width |
|---|---|
New JIS
Old JIS
|
Two-digit notation Integer (mm) Without keyway 00 |
Without keyway W00
Hole Tapping
| Number of taps and position | Tap size |
|---|---|
|
Two-digit notation Integer (mm) Without taps: M00 |
Without taps: D0M00
Surface treatment
K: Electroless nickel phosphorus plating
Note: No nickel plating for additionally finished parts.
Model numbering
| Pulley model no. |
|---|
| PT30P8M15AF |
| Sample model no. | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bore Finishing | Keyway Finishing | Hole Tapping | Surface treatment | |||||||||
| – | H | 050 | N | – | J | 14 | D | 2 | M | 08 | – | K |
| – | Shaft bore tolerance | Shaft bore diameter | Chamfer amount | – | Keyway tolerance | Keyway width | D | Number of taps and position | M | Tap size | – | Surface treatment |
In the examples above, the model no. and bore finishing code would be
PT30P8M15AF-H050N-J14D2M08-K.
Caution
Keyway and tap follow JIS standards. Customers should check whether they can use this under their usage conditions, or contact a Tsubaki representative.
Finishing type (Tap finishing position)
- With AF types, the tap finishing angle of the 2nd hole is an approximate angle (since it is processed on the pulley’s tooth valley).
- Some holes may be counterbore holes when they are long.
- Finished taps come with set screws for each tap hole.
Set screw specifications
If the body is plated, set screws will be attached.
