Size mm (in) | Overall dimension (mm) | Weight (KG) |
15.9 (5/8") | 58X72X108 | 2.5 |
19.1 (3/4") | 58X72X108 | 2.5 |
22.2 (7/8") | 58X72X108 | 2.5 |
25.4 (1") | 58X72X108 | 2.5 |
28.6 (1-1/8") | 58X82X110 | 2.5 |
31.7 (1-1/4") | 58X82X110 | 2.5 |
34.9 (1-3/8") | 58X82X110 | 3.8 |
38.1 (1-1/2") | 58X82X110 | 3.8 |
41.3 (1-5/8") | 58X82X110 | 3.8 |

Recommend Products
Size mm (in) | Overall dimension (mm) | Weight (KG) |
15.9 (5/8") | 114X100X119 | 5.5 |
19.1 (3/4") | 114X100X119 | 5.5 |
22.2 (7/8") | 114X100X119 | 5.5 |
25.4 (1") | 114X100X119 | 5.5 |
28.6 (1-1/8") | 114X100X119 | 5.5 |
31.7 (1-1/4") | 114X100X119 | 5.5 |
34.9 (1-3/8") | 120X110X119 | 8 |
38.1 (1-1/2") | 120X110X119 | 8 |
41.3 (1-5/8") | 120X110X119 | 8 |

Three bolt polished rod clamp
Size mm (in) | Overall dimension (mm) | Weight (KG) |
15.9 (5/8") | 58X72X324 | 7.5 |
19.1 (3/4") | 58X72X324 | 7.5 |
22.2 (7/8") | 58X72X324 | 7.5 |
25.4 (1") | 58X72X324 | 7.5 |
28.6 (1-1/8") | 58X82X330 | 7.5 |
31.7 (1-1/4") | 58X82X330 | 7.5 |
34.9 (1-3/8") | 58X82X330 | 11 |
38.1 (1-1/2") | 58X82X330 | 11 |
41.3 (1-5/8") | 58X82X330 | 11 |

Structural features
1. The product is mainly composed of slip body, clamp tooth and high-strength T-bolt, with simple structure, reliable clamping, anti loose function, safe and convenient use.
2. The product adopts the inner groove design, which is improved on the basis of the past through chute, greatly improving the strength of the slip body.
3. Using increased high-strength T-bolt can prevent the ring from stretching and cracking.
4. This product is made of 20crmoti and 25 × steel. After carburizing and quenching treatment, the surface hardness reaches HRC58-62, the core structure has good toughness, the whole bayonet has good comprehensive mechanical properties, and it is suitable for all kinds of polished rods.




The market share of FRT Machinery is growing steadily and rapidly. Our products have a presence in more than 50 countries and regions in the world, covering North America, Latin America, Russia and Central Asia, the Middle East, Asia Pacific, Europe and Africa.
FRT has a skilled and experienced after sales team geared up for fast response and superior services to our customers at any time. Our Long distance monitoring center is equipped to monitor, diagnose, serve and manage the units delivered. XRR also provides technical training to our customers at regular intervals.

FAQ