Shock Guard TGM Series
- Sealed type with excellent environmental resistance
- ・Impervious to dust, oil, and water infiltration, and oil leakage as well.
- ・Accuracy of consecutive repeated trip torque fluctuations is within ±5%.
- ・There is no phase shift between the drive side and driven side due to the engagement of the cam follower and pocket.
- ・When the Shock Guard trips, the limit switch can be actuated as the LS detection plate slides in an axial direction.
- ・Long service life withstanding over 100,000 trips.
- ・With sprocket and coupling type are also available.
Usable sprocket minimum number of teeth
・TGM Series
Model No. | Minimum number of teeth for sprockets | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
RS25 | RS35 | RS40 | RS50 | RS60 | RS80 | RS100 | RS120 | |||||||||||
TGM3 | ※30 | 22 | 17 | 15 | ||||||||||||||
TGM6 | ※30 | 22 | 17 | 15 | ||||||||||||||
TGM20 | ※34 | 24 | 19 | 16 | 14 | |||||||||||||
TGM60 | ※32 | 26 | 21 | 18 | 15 | |||||||||||||
TGM200 | ※37 | 30 | 26 | 20 | 17 | |||||||||||||
TGM400 | ※41 | 35 | ※27 | 24 | 20 | |||||||||||||
TGM800 | ※41 | 35 | ※27 | 24 | 20 |
※The numbers marked with * are not standard numbers of teeth.
(Note ) Insert the joint link from the outside of the sprocket.
Note ) Sprocket transmissible power is not considered,
Video content
Construction
(1) Adjusting Screw (2) Coil spring A (3) Spring washer (4) Housing (5) Lever (6) Fulcrum Pin (7) Bearing B (8) Roller Pin
(9) Cam Follower (10) Packing (11) Sealing (12) Bearing A (13) Thrust Washer (14) Cam Shaft (15) Cover
(16) LS Detecting Plate (17) Cam Actuation Plate (18) Coil spring B (19) Spring pin (20) Hex bolt (21) Hex set screw
(22) Hex set screw
Operating principle
Animation showing the operating principle of the TGM Series.
During normal operation (engagement)
Torque is transmitted through engagement by 2 points contact with the cam follower and pocket.
Pressure is added on the cam follower pocket using a rectangular spring to firmly push down in the radial direction.
This allows Tsubaki to create a backlash free overload protection device with high trip torque precision.
Reset is automatic, so the cam follower will reset to its original position when restarted.
There are two points of contact so there is no misalignment with the original phase.
During overload (trip)
During overloads, the cam follower pops out of the pocket and begins to rotate along the outer race of the camshaft.
There is no sliding, only rolling, so the nominal overrunning drag torque is extremely low for excellent durability.
Further, the simple design with one point of engagement means that its high trip torque precision is not lost.
Movement during overloads (trips)
When an overload trips the Shock Guard, the LS sensor plate slides along the shaft.
This activates the limit switch and cuts the power, and it can also be made to trigger an alarm.
The LS sensor plate slides three times for every one trip.
*Refer to the instruction manual for overload detection using the limit switch.
Package (Standard models )
Set torque range N・m | Repeat working torque precision | Backlash | Reset method |
---|---|---|---|
0.6~1060 | ±5% | NO | Automatic |
Catalogs ・Instruction Manuals
Model No. Designation
※No-coupling type
TGM | 60 | - | TH30JDY | - | WS | - | N25 |
| Series |
| Size |
| Shaft bore code |
| | | |
| Set torque value N・m |
|||
Spring type SS:Enhanced spring WS:Weak spring NO :Standard spring |
※Coupling type
TGM | 60 | C | - | TH20JDY | X | CH30ED2 | - | WS | - | N98 |
| Series |
| Size |
| | | |
| Shock guard side Shaft bore code |
| Coupling side Shaft bore code |
| Spring type |
| Set torque value N・m |
||||
Coupling type |
Note ) The set screw position of the Shock Guard side is as seen from the adjustment nut side, and the set screw position of the coupling side is as seen from the hub side.
■ Tsubaki model No. navigation
List of Model Numbers
※Click the model No. for detailed information.
Set torque range N・m |
No-coupling type | Coupling type | ||
---|---|---|---|---|
Range of Shaft Bore Diameters mm |
Model No. | Bore Diameter Range on Coupling Side mm |
Model No. | |
0.6~1.5 | 10~14 | TGM3-T□□□□-WS | 14~30 | TGM3C-T□□□□XC□□□□-WS |
1.5~3.7 | TGM3-T□□□□ | TGM3C-T□□□□XC□□□□ | ||
2.5~6.4 | 10~14 | TGM6-T□□□□ | 14~30 | TGM6C-T□□□□XC□□□□ |
6.0~12 | TGM6-T□□□□-SS | TGM6C-T□□□□XC□□□□-SS | ||
3.7~12 | 14~20 | TGM20-T□□□□-WS | 14~32 | TGM20C-T□□□□XC□□□□-WS |
6.4~20 | TGM20-T□□□□ | TGM20C-T□□□□XC□□□□ | ||
7.3~23 | TGM20-T□□□□-SS | TGM20C-T□□□□XC□□□□-SS | ||
7.6~26 | 20~30 | TGM60-T□□□□-WS | 14~42 | TGM60C-T□□□□XC□□□□-WS |
20~69 | TGM60-T□□□□ | TGM60C-T□□□□XC□□□□ | ||
44~105 | TGM60-T□□□□-SS | TGM60C-T□□□□XC□□□□-SS | ||
30~98 | 28~50 | TGM200-T□□□□-WS | 20~55 | TGM200C-T□□□□XC□□□□-WS |
68~225 | TGM200-T□□□□ | TGM200C-T□□□□XC□□□□ | ||
101~289 | TGM200-T□□□□-SS | TGM200C-T□□□□XC□□□□-SS | ||
118~235 | 38~60 | TGM400-T□□□□-WS | 30~75 | TGM400C-T□□□□XC□□□□-WS |
225~451 | TGM400-T□□□□ | TGM400C-T□□□□XC□□□□ | ||
451~902 | 38~60 | TGM800-T□□□□ | 30~75 | TGM800C-T□□□□XC□□□□ |
532~1060 | TGM800-T□□□□-SS | TGM800C-T□□□□XC□□□□-SS |
Sizing
Our selection calculator will select the right Shock Guard from Tsubaki's entire Shock Guard series to match your usage conditions.
Click the "Sizing" tab at the top of this page.
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