TSUBAKI Double Pitch Chain Sprockets
Fit Bore Sprocket
Can immediately be used as is with no additional troublesome finishing.
Sprockets can be freely selected from these set finishings.
Available models
| Models | |
|---|---|
| Double Pitch Chain Sprockets | Steel type |
| Stainless steel type | |
| Sprockets for Double Plus Chains | |
We finish standard Easy Finished Bore Type sprockets from in-house stock.
Specifications (set finishings)
You can select the hub type/number of teeth/tooth hardening, shaft bore diameter/tolerance, chamfer, keyway width/tolerance, tap hole finishing (number of taps/position/size), and surface treatment from available models.
Shaft bore finishing range
Bore tolerance
G: G7
H: H7
M: M7
*Grade 7 only
Shaft bore diameter
Set for each size
Specify with three integers
(Plain bore diameter + 1 mm round-up integer-maximum bore diameter)
Chamfer code
N: Tsubaki standard (see table at bottom)
A: C1
B: C2
C: C3
| Shaft bore diameter (mm) | Chamfer amount (mm) |
|---|---|
| 10 to 20 | 1 |
| 21 to 32 | 1.2 |
| 33 to 50 | 1.6 |
| 51 to 80 | 2.5 |
| 81 to 130 | 3 |
*If there is no keyway, use half values of the table above
| Shaft bore diameter | Chamfer code | |||
|---|---|---|---|---|
| 10 to 17 | N | A | – | – |
| 18 to 44 | N | A | B | – |
| 45 to 130 | N | A | B | C |
Keyway
Keyway width tolerances and grades
J: Js9
F: F7
P: P9
E: E9
W: Without keyway
Keyway width
Specify with two integers (JIS standard)
*Without keyway: W00
*Keyway size can only be selected with Js9 and P9 (new JIS). Users can select duplicate min/max keyway sizes for applicable shaft bore diameter ranges
Tapped hole
Number of taps and position
Tap size
Specify with two integers (standard sizes) *Comes with set screws
*Without taps: D0M00. *Select upper and lower standard sizes. It should be greater than M4, and within the keyway width (see the following for more details)
| Applicable Shaft bore diameter mm | Keyway width mm | Standard size | v |
|---|---|---|---|
| 10 to 12 | 4 | M4 | － |
| 12 to 17 | 5 | M5 | M4 |
| 17 to 22 | 6 | M6 | M5 |
| 22 to 30 | 8 | M6 | M5, M8 |
| 30 to 38 | 10 | M8 | M6, M10 |
| 38 to 44 | 12 | M8 | M6, M10 |
| 44 to 50 | 14 | M8 | M6, M10 |
| 50 to 58 | 16 | M10 | M8, M12 |
| 58 to 65 | 18 | M10 | M8, M12 |
| 65 to 75 | 20 | M12 | M10, M16 |
| 75 to 85 | 22 | M12 | M10, M16 |
| 85 to 95 | 25 | M16 | M12, M20 |
| 95 to 110 | 28 | M16 | M12, M20 |
| 110 to 130 | 32 | M20 | M16 |
| Applicable Shaft bore diameter mm | Keyway width mm | Standard size | v |
|---|---|---|---|
| 10 to 13 | 4 | M4 | － |
| 14 to 20 | 5 | M5 | M4 |
| 21 to 30 | 7 | M6 | M5 |
| 31 to 40 | 10 | M8 | M6, M10 |
| 41 to 50 | 12 | M8 | M6, M10 |
| 51 to 60 | 15 | M8※ | M6, M10 |
| 61 to 70 | 18 | M10 | M8, M12 |
| 71 to 80 | 20 | M12 | M10, M16 |
| 81 to 95 | 24 | M12 | M10, M16 |
| 96 to 110 | 28 | M16 | M12, M20 |
| 111 to 125 | 32 | M20 | M16 |
| 126 to 140 | 35 | M20 | M16 |
*Conventionally it is M10 but it will be changed to M8.
Surface treatment
B: Black coating
K: Electroless nickel phosphorous coating
C: Electrogalvanized trivalent chromate treatment
When a black oxide coating is selected, we will also coat finished areas (shaft bore, keyway tolerance, tap hole). Other additional processing will not be performed on finished areas.
Tapped hole positioning/Set screw specifications
Tapped hole positioning
B = A/2
(May differ depending on welding specifications.)
Long tapped holes will be counterbored.
Set screw specifications
- Steel cup point set screws with hexagonal hole.
- Uses stainless steel screws with stainless steel sprockets.
Reference Number System
| RF2060R-1B1200T | – | H | 030 | N | – | J | 08 | D2 | M06 | – | K |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
(1) Base sprocket model number
(2) Bore tolerance
(3) Shaft bore diameter
(4) Shaft bore chamfers
(5) Bore tolerance
(6) Keyway width
(7) Tap size
(8) Tapped hole
(9) Surface treatment
