Production role
A hairpin bender is used before coil assembly. It bends prepared tube lengths into U-shaped hairpins so they can be inserted into fin packs and then expanded for tube-to-fin contact.
Tube bending equipment
Hairpin Bender for heat exchanger tube preparation.
Sinoak supplies full automatic and semi-auto hairpin benders for preparing U-shaped copper or aluminum tubes before fin pack insertion and tube expansion.
Send hairpin bender RFQ
Catalog model options
| Item | Full automatic SKQZ-6/8 | Semi-auto SKBZ-4/5 |
|---|---|---|
| Maximum bends | 6 or 8 | 4 or 5 |
| Tube diameter | 5-15.88 mm | 5-15.88 mm |
| Wall thickness | 0.25-0.8 mm | 0.25-0.8 mm |
| Center distance | According to fin drawing | According to fin drawing |
| Bending length | Min. 200 mm; max. 3000 or 5000 mm | Min. 200 mm; max. 3000 mm |
| Cycle reference | <=12 s for workpiece about 1 m | <=12 s for workpiece about 1 m |
| Feeding mode | Motor driving type or eye-to-sky type | By hand |
Selection points
Tube sizeConfirm tube diameter, wall thickness and whether the tube is copper or aluminum.
Bend geometryProvide center distance, leg length, bend radius and fin drawing.
Automation levelChoose full automatic for higher output or semi-auto for simpler workflow and smaller batches.
Downstream fitMatch hairpins with fin pack size, expander tooling and coil assembly method.
RFQ details to prepare
- Tube material, diameter and wall thickness.
- Hairpin drawing or sample photo with center distance.
- Required leg length, bend radius and maximum workpiece length.
- Daily output target and preferred feeding method.