Mono-Coil Tube
Liner Tube (L)
Spring-like stainless steel coil, with no interlocks. Normally used with PVC sheathing or stainless steel braiding applied to the exterior to prevent stretching. Superior pliability, resists lateral pressure, ultra-thin, and had no limitation on the inner or outer diameter.
Features and Attributes:
- No interlocks, but rather a spring like stainless steel coil (see Figure 1 in Technical Specs)
- Superior pliability
- Resists lateral pressure
- Ultra-thin
- No limitation on the inner or outer diameter
- Normally used with PVC sheathing or stainless steel braiding (applied to the exterior to prevent stretching)
- RoHS Compliant
Standard Product:
- Flexible Tube Material: Stainless Steel, SK material, Flat Wire
- Sheathing Material: Polyvinyl Chloride (PVC), Polyurethane(TPU), Polyethylene(PE), Stainless Steel Braiding
- Length: Maximum continuous length is 10 to 16 meters per piece.
- All customizations outside of the standard listed above, will be custom and made to order. Please view Customizations for a full listing of available options.
Services Available Upon Request:
- Custom lengths
- For extra-sturdy lateral pressure protection, a double-layered mono-coil structure is also available.
- Inner diameters from 0.1mm up to approx. 25mm available.
Common Applications:
- Endoscopes (industrial/medical equipment)
- Optical fiber and sensor cable protection
- Guide shafts, concrete vibrators, etc.
- Guide shafts for lawnmowers (SK Material, Flat Wire)
Stock Level: Non-stock made to order item. General lead time is 4-6 weeks.
Figure 1.
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Standard type |
PVC coating type |
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Model (Part Number) |
“d” ID mm (inch) |
“D” OD |
“t” Wall (mm) |
“W” Width (mm) |
“P” Pitch |
Approx |
Max Length |
Stock |
Model (Part Number) |
OD |
Approx Weight (g/m) |
Max Length |
Stock |
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L-0.2-0.3-0.45-0.1 |
0.2 (0.008) |
0.3 (0.012) |
0.05 |
0.45 |
0.1 |
1 |
1 |
Contact Us |
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L-0.7-0.8-1.2-0.3 |
0.7 (0.028) |
0.8 (0.031) |
0.05 |
1.2 |
0.3 |
3 |
5 |
Contact Us |
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L-1.7-2.0-1.2-0.2 |
1.7 (0.067) |
2.0 (0.079) |
0.15 |
1.2 |
0.2 |
7 |
15 |
Contact Us |
LP-1.7-2.0-2.4-1.2-0.2 |
2.4 (0.094) |
8 |
15 |
○ |
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L-2.1-2.5-2.0-0.2 |
2.1 (0.083) |
2.5 (0.098) |
0.2 |
2.0 |
0.2 |
12 |
15 |
Contact Us |
LP-2.1-2.5-3.1-2.0-0.2 |
3.1 (0.122) |
14 |
15 |
Contact Us |
|
L-2.2-2.6-1.2-0.2 |
2.2 (0.087) |
2.6 (0.102) |
0.2 |
1.2 |
0.2 |
12 |
15 |
Contact Us |
LP-2.2-2.6-3.2-1.2-0.2 |
3.2 (0.126) |
14 |
15 |
Contact Us |
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L-2.6-3.0-1.2-0.3 |
2.6 (0.102) |
3.0 (0.118) |
0.2 |
1.2 |
0.3 |
16 |
15 |
Contact Us |
LP-2.6-3.0-4.0-1.2-0.3 |
4.0 (0.157) |
17 |
15 |
Contact Us |
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L-2.8-3.2-1.2-0.3 |
2.8 (0.110) |
3.2 (0.126) |
0.2 |
1.2 |
0.3 |
17 |
15 |
○ |
LP-2.8-3.2-4.2-1.2-0.3 |
4.2 (0.165) |
19 |
15 |
○ |
|
L-2.8-3.2-2.0-0.3 |
2.8 (0.110) |
3.0 (0.126) |
0.2 |
2.0 |
0.3 |
17 |
15 |
Contact Us |
LP-2.8-3.2-4.2-2.0-0.3 |
4.2 (0.165) |
19 |
15 |
Contact Us |
|
L-3.1-3.5-1.2-0.3 |
3.1 (0.122) |
3.5 (0.138) |
0.2 |
1.2 |
0.3 |
20 |
15 |
Contact Us |
LP-3.1-3.5-4.7-1.2-0.3 |
4.7 (0.185) |
22 |
15 |
Contact Us |
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L-3.2-3.6-2.0-0.2 |
3.2 (0.126) |
3.6 (0.142) |
0.2 |
2.0 |
0.2 |
21 |
15 |
Contact Us |
LP-3.2-3.6-4.8-1.2-0.3 |
4.8 (0.189) |
24 |
15 |
Contact Us |
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L-3.5-3.9-2.0-0.1 |
3.5 (0.138) |
4.1 (0.161) |
0.2 |
2.0 |
0.1 |
25 |
15 |
Contact Us |
LP-3.5-3.9-4.7-1.2-0.1 |
4.7 (0.185) |
29 |
15 |
Contact Us |
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L-4.0-4.6-2.0-0.3 |
4.0 (0.157) |
4.6 (0.181) |
0.3 |
2.0 |
0.3 |
30 |
15 |
○ |
LP-4.0-4.6-5.4-2.0-0.3 |
5.4 (0.213) |
37 |
15 |
○ |
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L-4.5-5.1-2.0-0.2 |
4.5 (0.177) |
5.1 (0.201) |
0.3 |
2.0 |
0.2 |
36 |
15 |
Contact Us |
LP-4.5-5.1-6.3-2.0-0.2 |
6.1 (0.240) |
46 |
15 |
Contact Us |
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L-5.0-5.6-2.0-0.3 |
5.0 (0.197) |
5.6 (0.220) |
0.3 |
2.0 |
0.3 |
42 |
15 |
○ |
LP-5.0-5.6-6.5-2.0-0.3 |
6.5 (0.256) |
50 |
15 |
○ |
|
L-6.0-6.6-2.0-0.3 |
6.0 (0.236) |
6.6 (0.260) |
0.3 |
2.0 |
0.3 |
45 |
15 |
Contact Us |
LP-6.0-6.6-7.5-2.0-0.3 |
7.5 (0.295) |
57 |
15 |
Contact Us |
|
L-7.0-7.6-2.0-0.3 |
7.0 (0.276) |
7.6 (0.299) |
0.3 |
2.0 |
0.3 |
48 |
10 |
○ |
LP-7.0-7.6-8.5-2.0-0.3 |
8.5 (0.335) |
63 |
10 |
○ |
|
L-7.2-7.8-2.0-0.3 |
7.2 (0.283) |
7.8 (0.307) |
0.3 |
2.0 |
0.3 |
50 |
10 |
Contact Us |
LP-7.2-7.8-8.7-2.0-0.3 |
8.7 (0.343) |
66 |
10 |
▲ |
|
L-8.5-9.1-2.0-0.2 |
8.5 (0.335) |
9.1 (0.358) |
0.3 |
2.0 |
0.2 |
|
|
Contact Us |
LP-8.5-9.1-10.1-2.0-0.2 |
10.1 (0.398) |
|
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▲ |
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L-10.8-11.4-3.0-0.75 |
10.8 (0.425) |
11.4 (0.449) |
0.3 |
3.0 |
0.75 |
|
|
Contact Us |
LP-10.8-11.4-12.6-3.0-0.75 |
12.6 (0.496) |
|
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▲ |
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L-15.0-16.0-5.0-1.0 |
15.0 (0.591) |
16.0 (0.630) |
0.5 |
5.0 |
1.0 |
|
|
Contact Us |
LP-15.0-16.0-17.2-5.0-1.0 |
17.2 (0.677) |
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▲ |
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L-17.0-18.0-5.0-1.5 |
17.0 (0.669) |
18.0 (0.709) |
0.5 |
5.0 |
1.5 |
|
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Contact Us |
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L-20.0-22.0-5.0-1.0 |
20.0 (0.787) |
22.0 (0.866) |
1.0 |
5.0 |
1.0 |
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Contact Us |
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○=HAGITEC standard stock item. Stock quantity will be 10 to 100m. |
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Attached are the general available options for customization. Please be advised that there may be restrictions based upon size, and application for usage. Please Contact Us for support on your customization requirements!
Available Flexible Metal Tube Materials:
| Material | Grade |
Application |
Features | Applicable Tube Type |
| Stainless Steel | – SUS304 (Standard) – SUS303 – SUS316 – SUS430 |
– General Industrial – Medicinal |
– Rigid – Does not Rust |
– Most tube type |
| Aluminum | – General Industrial – Medicinal |
– Does not Rust – Anti-Static – Lightweight but Less Sturdy – Excellent Thermal Conduction |
– Square Lock A – Interlock Type B – Screw Tube |
|
| Titanium | – General Industrial – Medicinal – Space Engineering |
– Rigid – Anti-Static – Lighter than Stainless Steel |
– Square Lock A | |
| Bronze Phosphate | – C5341 | – Noise Counter-Measure | – Electromagnetic Compatibility (EMC) | – Most tube type |
| Copper | – Noise Counter-Measure | – Electromagnetic Compatibility (EMC) | – Most tube type | |
| Brass | – Noise Counter-Measure | – Electromagnetic Compatibility (EMC) | – Most tube type | |
| Steel | – Galvanized Steel Strip – SK Material (Hardest Steel) |
– General Industrial | – Affordable Price – Heavy – Rusty – Generally Needs to be Sheathed |
– Most tube type |
Sheathing Materials and Information
Adding a resin/rubber coating to a flexible tube provides the following additional benefits:
– Waterproof/resistant
– Oil-proof/resistant
– Attractive appearance
– Additional strength
– Superior insulation
**The following chart displays the most common materials available. Please consult us regarding specifications, minimum lot, delivery date, sheathing combinations, and additional materials available (including any heat or chemical resistance requirements).
| Material Type (Code) | Characteristic | Color | Resin Feature | Surface Appearance |
| PVC/Polyvinyl Chloride (P) | Soft | Black (Standard), Gray, White, Ivory, Red, Pink, Orange, Yellow, Yellow-Green, Green, Blue, Clear | – Pliable – Chemical Resistant – Heat Resistant up to 60°C – High Oil Resistance |
– Glossy – Matte – Clear |
| Semi rigid | Black | – Slightly Hard – Smooth Surface – Chemical Resistant – Heat Resistant up to 60°C – Oil Resistant |
– Glossy | |
| Flame Resistant | Black, Gray, White, Red, Pink, Orange, Yellow, Green, Blue | – Pliable – Chemical Resistant – Heat Resistant up to 60°C – High Oil Resistance |
– Glossy | |
| Flame Resistant, UL Standard | Black | – Pliable – Chemical Resistant – Heat Resistant up to 105°C – High Oil Resistance |
– Matte | |
| Polyethylene (PE) | Low density (LDPE) | Black | – Harder than the Soft Hard Type – Smooth Surface – Chemical Resistant – Heat Resistant up to 70°C – High Oil Resistance |
– Glossy |
| Polyester Elastomer (TEEE) |
We can provide soft(ShoreA90) to Semi rigid(ShoreD72) | Black Opaque | – Pliable – Weatherproof – Heat Resistance up to 120°C |
– Glossy |
| Silicone Rubber (Si) | Soft | Black, Gray | – Pliable – Heat Resistance up to 180°C |
– Matte |
| Fluorocarbon Resin (FEP) (ETFE) (PFA) |
Flame Resistant | Black | – Less Pliable – Excellent Chemical and Oil Resistance – Slippery Non-Stick Surface – Heat Resistant up to 220°C |
– Glossy |
| Polyurethane (PU) | Ester Grade | Black | – Pliable – Abrasion Resistant – Heat Resistant up to 70°C |
– Glossy |
| Ether Grade | Black, Ivory | – Pliable – Abrasion Resistant – Water Soluble – Heat Resistant up to 70°C |
– Glossy | |
| Olefin Elastomer (O) | Soft | Black | – Pliable – Weatherproof – Heat Resistant up to 60°C |
– Matte |
PVC Sheathing Varieties
| Figure Num. | Sheathing Variety | Part Number Code | Features |
| 1 | Tight-Fitting | KSP- __N | – Standard item – PVC fills the spiral valley to make the finished surface even and smooth. |
| 2 | Vacuum Sheathing | KSP-__N-B | – During processing, sheathing is applied in a vacuum. – The finished surface maintains the spiral pattern of the coil. |
| 3 | Bagging Sheathing | KSP-__N-F | – Sheathing is applied only on the surface of the tube and the spiral valley contains no PVC. The surface of the sheathing will be completely smooth. |
| N/A | Heat Shrink Sheathing | KSP-__N + Shrink tube type# | – Please contact us for more details. |
Other Services
Double Washing and Chemical Polishing
Double washing:
Double washing treatment (using detergent) can be applied to tubes for high precision applications.
Chemical polishing:
We offer tubes with chemical polishing, providing extra shine for optical applications.
※ Special polishing for semiconductor-quality applications also available.
Instructions on How to Measure Bend Radius: PDF Here