Single-ear Infinite Clamp Oetiker vs. TFurther

2. Product Drawing
(Illustration not translated)

3. Theoretical Product Dimensions

Model	Min. Achievable Diameter (D1)	Delivery Diameter (D)	Material Thickness (T) ±0.1	Clamp Width (W) ±0.1	Inner Ear Width (S) (mm)	Clamped Ear Width (S1)	Clamping Force
Tianyuan 37	32.9	37	0.8	10	13	≤40%	4000N
Oetiker 37	32.9	37	0.8	10	13	≤40%	4000N

4. Measured Product Dimensions Comparison

Brand	Ear Width	Ear Height	Inner Diameter	Hook	Material Width	Material Thickness	Warp Height	Ear Root Angle
Tianyuan	12.81	3.10	36.58	2.56	9.99	0.80	0.13	112°
	12.79	3.09	36.57	2.63	10.0	0.80	0.14	114°
	12.79	3.12	36.56	2.67	9.98	0.81	0.12	109°
Oetiker	13.21	3.13	36.87	2.43	10.08	0.81	0.14	117°
	13.18	3.11	36.83	2.40	10.09	0.80	0.13	115°
	13.17	3.18	36.85	2.44	10.07	0.80	0.14	113°

5. Technical Requirements & Test Methods

5.1 Appearance
Surface must be smooth, free of burrs, bubbles, cracks, or other mechanical defects.

Brand	Color	Burrs	Roundness	Illustration	Judgment
Oetiker	Gray	Slight burrs	High	–	Close
Tianyuan	Gray	Slight burrs	Within tolerance (±0.5mm)	–	Close

5.2 Material (Comparison: 10×0.8 stainless steel strip)

Brand	Grade	Ni Content	Cr Content	Tensile Strength	Yield Strength	Hardness	Judgment
Oetiker	304 Stainless	8.05%	18.2%	680 MPa	260 MPa	192 HV	Slightly lower Ni content; theoretical impact on corrosion resistance
Tianyuan	Baoxin 304	8.12%	18.3%	710 MPa	281 MPa	185 HV	Slightly higher Ni content than Oetiker

5.3 Tactile Comparison (10×0.8 stainless steel strip)

Brand	Edge	Full Product Image	Profile Image	2D Image	Judgment
Oetiker	Slight burrs	–	–	–	Minor burrs
Tianyuan	Rounded, no burrs	–	–	–	Superior to Oetiker

5.4 Tail Structure Performance Comparison

Brand	Tail Structure	Features	Other	Conclusion
Oetiker	Crimped tail design (Oetiker 193)	Effectively prevents tail lifting	–	Tianyuan’s improved design achieves similar functionality
Tianyuan	Right-side crimp design	Inspired by Oetiker, hooks and presses the right side to prevent tail lifting	–	Equivalent effect to Oetiker 193

5.5 Salt Spray Test (7×0.6, 5×0.5, 9×0.6, etc.)

Brand	Test Condition	Duration	State	Other	Judgment
Oetiker	5% neutral salt spray	500 hrs	No rust	–	Identical
Tianyuan	5% neutral salt spray	500 hrs	No rust	–	Identical

6. Performance Testing

6.1 Air Tightness Test *(Same pipe fitting, 37-size clamps)*

Brand	Test Item	Condition	Illustration	Judgment
Oetiker	Hose assembly pressurized to 0.6 MPa	No leakage	–	Identical
Tianyuan	Hose assembly pressurized to 0.6 MPa	No leakage	–	Identical

Method & Requirements:

6.2 Aging Test (Ear Width Over Time)

Brand	Initial Ear Width	2H	4H	8H	12H	24H	Illustration	Judgment
Oetiker	13.05	1.08	1.08	1.08	1.08	1.08	–	Identical
Tianyuan	12.89	1.11	1.11	1.11	1.11	1.11	–	Identical

6.3 Clamping Force Test (Specification: 37)

Brand	Test Item	Requirement	Illustration	Force Value	Clamped Ear Width	Judgment
Oetiker	Clamping Force	4000N; no breakage/deformation	–	–	1.08	Identical
Tianyuan	Clamping Force	–	–	–	1.11	Identical

Test Notes:

Each clamp size requires a specific clamping force for effective sealing (critical parameter).
Calibrate pneumatic/manual tools with a standard force gauge before installation.

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