Tube Rolling, Grooving, Cutting and Inner Grooving Machines - CNC Tube inner grooving broaching machine

What inner grooving does

Gas spring, shock absorber and damper cylinders carry several longitudinal grooves on the bore. Where the piston passes a grooved section, oil or gas bypasses it; where there is no groove, flow is damped. Groove length, depth, number and position set the tailgate opening speed, chair lift feel or damping curve, so they must be consistent from part to part.

Servo and hydraulic models

Model	Drive	Features
TD-627	Servo	Groove length, depth and feed programmed; product change is a program change; for plants running many sizes with tight consistency
TD-61530	Hydraulic	Simple mechanism, intuitive setup; for fixed-spec tailgate strut and gas lift lines

Paired with the closing machine

Grooving and end closing are the two core cylinder operations. TONG DA builds both the TD-31040 closing machine and the TD-627 grooving machine, with matched clamping and positioning, so they can be planned together.

How to start

Send cylinder OD × wall × material × length and the groove drawing (length, depth, number, position); TONG DA trial-grooves and returns samples.

TD-627 Servo Inner Grooving Machine | CNC Tube Grooving for Gas Spring & Shock Absorber Cylinders

CNC tube grooving machine for gas spring, tailgate strut and shock absorber manufacturers. TD-627 is TONG DA’s servo inner grooving machine. It draws the longitudinal oil grooves on the bore of gas spring (tailgate strut, gas lift), shock absorber and damper cylinders that set opening speed and damping. Groove length, depth and feed are programmed on the servo slide, so a product change is a recipe recall, not a machine reset; automatic tube feeding, one operator. With the TD-31040 closing machine it forms a complete gas spring cylinder line.

TD-627 Servo Damping Groove Machine | 1, 2 or 3 Inner Grooves at Different Depths for Tailgate Struts & Gas Springs

The TD-627 servo inner grooving machine presses lengthwise damping grooves into the inner wall of tailgate strut and gas spring cylinders. It makes one groove, two grooves at 180° or three grooves at 120°, up to three grooves each at its own depth, and several segments on one line. Groove length, depth and width are set on the touch screen. The length, depth and number of grooves decide how fast the strut opens and closes.