The simple division of barbell bars in China can be divided according to the following specifications:
1, length: 1.2, 1.5,1.8,2.2 (never seen a longer one).
2. handshake diameter: 25mm? 28mm? 30mm 32mm 50mm(50% is only seen on Taobao, which is a special strength weightlifting pole) The Olympic weightlifting pole is 28mm, but at present, it is more than 30mm or 32mm in China. In order to increase the safety load, 25mm is obviously a low-end contraction pole.
3. Shape: straight rod, snake-shaped bent rod, super-bent rod, annular hard pull rod, convex squat rod and short annular arm training rod.
4. Hanging piece diameter: 25mm? 50mm. 50mm is better, 25mm is a small hole barbell piece, and 50 mm is an Olympic piece, that is, a large piece.
5. Self-weight: the minimum weight is below 5kg, and then there are 5.6kg, 8kg, 10kg, 13kg, 15kg, 18kg, 20kg, etc. It is an international standard for a regular 220cm bar to cost 20kg, but domestic 220cm bars are not like this, and many of them have shrunk. According to the density of steel and the volume of barbell bar, the result is 19.76kg, and the protruding amount should be 20kg. Many barbell bars of 220cm are less than 20kg because the sleeves are hollow. ?
6. Safe bearing: the minimum is about 50kg, and the maximum is1200kg, which is a regular pole. Of course, there are also 1200 kg or more Hercules squats, which are special poles that you can't touch. Some products in the gym should be able to safely withstand more than 350kg.
7. Craft: This is very important. Most barbell bars have no craftsmanship.
Rod body technology: electroplating, multi-layer electroplating, blackening and rust prevention.
Sleeve technology: bearing, copper sleeve, solid, hollow, integrated and non-integrated