Speed regulators for specific industrial needs
The CUSHION-START KINECHEK is a combination shock absorber and hydraulic check. The impact absorbing feature called “CUSHION-START” is a safeguard for those applications where a fast moving load exerts an impact force beyond the capacity of the Kinechek. Approximately 25% of the beginning of the stroke is used for cushioning, then the remaining portion of the stroke will control the load with the same constant uniformness as a regular Kinechek.
Slow Return Kinechek
The SLOW RETURN KINECHEK will control the speed of a load pushing on the plunger rod exactly the same as a regular KINECHEK. However, the automatic return action of the plunger rod is slowed by a fixed restricting orifice added to the unit’s internal flow passages. The time required for the plunger rod to extend can range from 6 seconds to 22 seconds per inch of stroke. This return time is not adjustable and depends upon the orifice size built into the unit. This feature is very helpful where automatic extension of the plunger rod would interfere with a second operation.
SLIMLINE and SUPER K KINECHEKS can be provided with a SKIPCHEK feature in ½ inch, 1 inch, 2 inch, 3 inch, 4 inch, and 6 inch stroke models. The fast feed (skip) interval reduces machining times when it is desired to line drill tubular sections, clevis parts etc. The skip feature is accomplished by adding a “by-pass” flow passage to the cylinder, thus permitting the SKIPCHEK to advance with minimal resistance over the length of the skip. The skip is custom engineered to each user’s specifications. Since Deschner SKIPCHEKS avoid complexity of added moving parts and seals, the user will benefit by receiving the reliable performance and long service life provided by all Kinecheks.
Drilling to a depth of more than three times the drill diameter often requires peck drilling where the drill is repeatedly withdrawn to remove waste cuttings while being advanced in steps deeper and deeper during each feed movement. For efficient peck drilling, the KINECHEK hydraulic feed control must be arranged to act only while the drill is cutting. This requires the KINECHEK plunger rod to remain virtually stationary during the intermittent retractions and reinsertions of the drill bit. After the hole is completed and the drill retracts for the last time before beginning a new hole, then and only then should the KINECHEK plunger rod fully extend to be in position to repeat the checking sequence. KINECHEKS with PECKCHEK Control are designed to operate in this manner.
Special Note: The PeckChek Control is a small pneumatically operated device that contains a one way ball clutch to prevent the automatic extension of the Kinechek plunger rod. The PeckChek Control mounts on a special Kinechek that uses a plunger rod that is hardened full length to withstand the brinelling action of the ball clutch and is approximately ½ inch longer than standard to accommodate the PeckChek Control without loss of controlled stroke length.