The J 1508 is a Chinese Mechanical Industry Standard (JB/T) that specifies the technical requirements, dimensions, testing methods, and classifications for a specific type of worm drive hose clamp. In simple terms, it is the Chinese standard equivalent to what is commonly known internationally as a worm gear hose clamp or a band clamp.
W2 perforated band worm drive hose clamp is one type of J1508 hose clamps. It is a specific, high-quality type of worm gear clamp recognized and standardized internationally. The "W2" means that material is Hosing and band stainless steel 201 or 301, screw carbon steel with zinc/nickel plated. It is considered a premium, heavy-duty clamp and is one of the most common and reliable types used globally for securing hoses in high-pressure and high-vibration environments.
Dimension chart:
| 1/2" (12.7mm) band width hose clamp with screw Material: W2 201/304 |
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| Part No | SAE Size |
Dimension | Part No | SAE Size |
Dimension | |||
| mm | in inch | mm | in inch | |||||
| AM12W220 | 6 | 11-20 | 0.44"-0.78" | AM12W283 | 44 | 59-83 | 2.31"-3.25" | |
| AM12W223 | 8 | 13-23 | 0.5"-0.91" | AM12W289 | 48 | 65-89 | 2.56"-3.5" | |
| AM12W227 | 10 | 14-27 | 0.56"-1.06" | AM12W295 | 52 | 72-95 | 2.81"-3.75" | |
| AM12W232 | 12 | 18-32 | 0.69"-1.25" | AM12W2102 | 56 | 78-102 | 3.06"-4" | |
| AM12W238 | 16 | 21-38 | 0.81"-1.5" | AM12W2108 | 60 | 84-108 | 3.31"-4.25" | |
| AM12W244 | 20 | 21-44 | 0.81"-1.75" | AM12W2114 | 64 | 91-114 | 3.56"-4.5" | |
| AM12W251 | 24 | 27-51 | 1.06"-2" | AM12W2127 | 72 | 103-127 | 4.06"-5" | |
| AM12W257 | 28 | 33-57 | 1.31"-2.25" | AM12W2140 | 80 | 117-140 | 4.62"-5.5" | |
| AM12W264 | 32 | 40-64 | 1.56"-2.5" | AM12W2152 | 88 | 130-152 | 5.12"-6" | |
| AM12W270 | 36 | 46-70 | 1.81"-2.75" | AM12W2165 | 96 | 141-165 | 5.56"-6.5" | |
| AM12W276 | 40 | 50-76 | 2"-3" | AM12W2178 | 104 | 157-178 | 6.18"-7" | |
Key Features of J 1508 hose clamps:
Worm Drive Mechanism: This is the defining feature. The clamp consists of a perforated stainless steel band and a housing that contains a worm gear. A screw (the worm) is turned, which engages with the gear teeth on the band, allowing for:
Even Circumferential Pressure: The clamp tightens uniformly around the hose, providing a secure, leak-proof seal.
High Clamping Force: The mechanical advantage of the worm gear allows for very high clamping force to be applied.
Self-Locking: The mechanism is inherently self-locking, meaning it resists loosening under vibration, which is critical in automotive and industrial applications.
Design Advantages:
Even Pressure Distribution: The design provides a uniform 360-degree sealing pressure around the hose, preventing leaks.
Exceptional Vibration Resistance: The positive engagement between the screw and the perforated band makes it virtually impossible for the clamp to loosen under vibration, a critical feature in automotive, marine, and industrial applications.
High Clamping Force: It can achieve very high clamping forces without damaging the band or slipping, making it suitable for pressurized systems.
Reusable: It can be easily loosened, repositioned, and re-tightened multiple times without losing its clamping ability.
Production workshop of J 1508 hose clamps
Contact Person： Vivian Zhang
Tel：862269629980
E-mail: vivian@rockclamp.com
Add：D1-403 Testing and Certification Park, Xiqing District, Tianjin, China
