Technical Data Sprockets for Large Size Conveyor Chains Sprocket structure
1. Basic construction
The sprocket teeth are given induction hardening. This increases the wear resistance and transmission capacity of the sprocket.
2. Hub Type
BW Type
A hub is welded onto a single side of the sprocket plate.
Applicable
- RF10 and below
- RF205 and below
BW1 Type
A hub is passed through the sprocket plate. While only protruding from one side, both sides are welded.
Applicable
- RF12 and above
- RF6205 and above
CW Type
Hubs are welded to both sides of the sprocket plate.
Applicable
- RF10 and below
- RF205 and below
CW1 Type
A hub is passed through the sprocket plate. Both sides of the hub protrude and are welded.
Applicable
- RF12 and above
- RF6205 and above
3. Teeth Profiles
1. shape
S1：Teeth are rounded
S2：Teeth are flat (cross-hatching represents shape if S1 were cut )
Note) When using chains with K attachments, S2 type teeth are used instead of S1 type teeth if slats or other parts of the chain may interfere with the sprocket outer diameter. When using customized chains or top roller chains, contact a Tsubaki representative.
2. Package
- ・Standard Series (Code N)
These non-heat treated specifications are suitable for low load, low wear applications. - ・hardened teeth specifications (Code Q)
The teeth have been induction hardened. Suitable for when wear resistance is required, or under heavy load conditions. The following chart shows the usage classification for both normal (N) and hardened teeth (Q) specifications.
Usage Classification for Normal and Hardened Teeth Series
| Chain Series | Roller type | drive | Driven Side | ||
|---|---|---|---|---|---|
| Normal Conditions | Wear-Inducing Conditions | Normal Conditions | Wear-Inducing Conditions | ||
| DT Series DTA Series |
S | Q | Q | N | Q |
| R | N | Q | N | N | |
| F | N | Q | N | N | |
| AT Series ATA Series |
S | Q | Q | N | Q |
| R | Q | Q | N | Q | |
| F | Q | Q | N | Q | |
The above classifications are based on standard usage conditions. Contact a Tsubaki representative regarding use in extremely wear-inducing, heavy load environments.
4. Finished Bore Series
The bore dimensions are processed under the following specifications so that time-consuming shaft processing can be finished quickly for delivery. Does not come with a set screw.
Standard Bore Processing Specifications
| Shaft bore tolerance | Keyway Width Tolerance | Hole Tapping |
|---|---|---|
| H8 | JIS B1301-1996 Normal type Js9 |
Two taps processed at 120º intervals, with one of them located on the keyway |
| Old JIS B1301-1959 Grade 2 E9 |
Phase of keyway and tooth tip
The keyway is machined so that the center of the sprocket tooth tip aligns with the center of the keyway.Please contact us if you wish to use chains in parallel.
Keyway and Tap Specifications and Dimensions
| JIS Standard Key Keyway Width Tolerance Js9 | |||
|---|---|---|---|
| Applicable Shaft Bore Diameter | Keyway Width KW |
Keyway Depth KH |
Tap size MX |
| More than 22, up to 30 | 8 | 3.3 | M6 |
| More than 30, up to 38 | 10 | 3.3 | M8 |
| More than 38, up to 44 | 12 | 3.3 | |
| More than 44, up to 50 | 14 | 3.8 | |
| More than 50, up to 58 | 16 | 4.3 | M10 |
| More than 58, up to 65 | 18 | 4.4 | |
| More than 65, up to 75 | 20 | 4.9 | M12 |
| More than 75, up to 85 | 22 | 5.4 | |
| More than 85, up to 95 | 25 | 5.4 | M16 |
| More than 95, up to 110 | 28 | 6.4 | |
| More than 110, up to 130 | 32 | 7.4 | M20 |
| More than 130, up to 150 | 36 | 8.4 | |
| More than 150, up to 170 | 40 | 9.4 | |
| More than 170, up to 200 | 45 | 10.4 | M24 |
| More than 200, up to 230 | 50 | 11.4 | |
| Old JIS Key Type 2 Keyway Width Tolerance E9 | |||
|---|---|---|---|
| Applicable Shaft Bore Diameter | Keyway Width KW |
Keyway Depth KH |
Tap size MX |
| More than 20, up to 30 | 7 | 3 | M6 |
| More than 30, up to 40 | 10 | 3.5 | |
| More than 40, up to 50 | 12 | 3.5 | M8 |
| More than 50, up to 60 | 15 | 5 | |
| More than 60, up to 70 | 18 | 6 | M10 |
| More than 70, up to 80 | 20 | 6 | M12 |
| More than 80, up to 95 | 24 | 8 | |
| More than 95, up to 110 | 28 | 9 | M16 |
| More than 110, up to 125 | 32 | 10 | M20 |
| More than 125, up to 140 | 35 | 11 | |
| More than 140, up to 160 | 38 | 12 | |
| More than 160, up to 180 | 42 | 13 | |
| More than 180, up to 200 | 45 | 14 | M24 |
| More than 200, up to 224 | 50 | 15.5 | |
| More than 224, up to 250 | 56 | 17.5 | |
Inform your Tsubaki representative of the following if processing specifications other than the above are required.
- ・Bore shape, diameter, and tolerance
- ・Keyway type, size, and tolerance
- ・Tap size and position
