External ring grooves, beads and decorative grooves cold-rolled on steel, stainless, aluminium and copper tube on TONG DA's own machines (TD-41335, TD-41860, TD-42815, TD-42001): no chips, no roll marks, stable depth. Inner damping grooves for gas spring cylinders are made on the TD-627.
Typical parts: conveyor roller and idler tubes, furniture and stroller tubes, decorative aluminium tube, gas spring and shock absorber cylinders, stainless bead-rolled parts.
![]() TD-41335 tube grooving | ![]() TD-4 OD32 beading | ![]() OD31.8 aluminium decorative grooves |
Drawing or sample, material, tube OD × wall × length, and quantity, to sales@tdco.com.tw. TONG DA Precision Enterprise Co., Ltd., Annan District, Tainan, Taiwan, since 1989.
Other processes: tube end closing · tube end reducing · tube cutting · all contract tube processing