The Q36 Series QUADRASTAT® Control mechanism uses a “strap-shoe locking mechanism” which has four main elements: a Primary Input Lever, an actuating or Output Lever, a Strap Shoe/Locking Pin Assembly and a Stationary Quadrant.
The Strap Shoe assembly is spring loaded to the unlocked position until a load is applied to the output, causing the Strap Shoe to rotate about the Locking pivot, forcing a Locking Pin to grip the Quadrant. The gripping force caused by a pin on the underside of the Quadrant and the Strap Shoe locks the control. Two Locking Pins enable the control to lock with an output load from either direction.
Specifications:
- Maximum operating load on output
|
200 in-lbs. |
- Maximum self-locking capacity
|
400 in-lbs. |
- Input lost motion
With 100 in-lbs. load on motion*
|
2.5° max. |
- Output lost motion
With full reversal of 100 in-lbs. load
|
3.5° max. |
- Min. output load required for self locking
|
50 in-lbs. |
- Input torque as a percentage of maximum operating load on output
|
|
| |
@ 20% = 3.0 x output torque |
| |
@ 60% = 1.6 x output torque |
| |
@ 100% = 1.2 x output torque
|
- Normal free running torque
|
20 in-lbs. |
- Torque to breakout of center detent
|
40 in-lbs. |
* Input lost motion is built in at factory and no adjustment is provided. |
