Mechanical Shear Bolt Lug Haplopore

What are shear bolts

A shear bolt is a specialized fixing for mechanical connections, typically used in low and medium voltage applications. It consists of a tin-plated body and a hexagonal head shear bolt manufactured from a special aluminum alloy and treated with a lubricating wax to enhance its durability.
JYIELE’s shear bolts are available in two types, removable and non-removable, to suit different installation needs. Designed to ensure a stable and reliable connection, the shear bolts are quick to install and strong, provide consistent shear torque and compression force, and are designed with grooves in the inner wall to enhance electrical and mechanical properties, making them suitable for a wide range of environments, both indoors and outdoors.

Product Features

Material: Tin-plated aluminum alloy

Operating temperature range: -55°C to 155°C (-67°F to 311°F)

Standard: GB/T 2314, IEC 61238-1

Features and Advantages

Wide range of applications: suitable for a wide range of conductors and materials

Compact design: space saving and easy to install

Stable torque: shear head nut ensures excellent electrical contact

Simple installation: operates with a standard socket wrench

Strong compatibility: pre-fabricated design suitable for medium voltage cables up to 42kV

Superior overcurrent and short-term current inrush capability: enhanced safety and stability.

Conclusion

The mechanical shear bolt body is constructed from high strength tinned aluminum alloy and is suitable for a wide range of indoor and outdoor applications with a choice of sizes to suit different needs.

Features and advantages of mechanical lugs and connectors	Function
Wide application range and strong versatility	For example, three specifications can cover 25mm2 to 400mm2 conductors.
The body is made of high-tensile tinned aluminum alloy	And it can be used with almost every type of conductor and material.
The bolts are made of special aluminum alloy	Good contact characteristics, can realize the connection between the copper conductor and the aluminum conductor.
Compact design	Only need a small installation space, especially suitable for large-scale applications.
Tubular spiral design inside the body to improve contact performance	Excellent electrical performance.
Centering hole and insert	The conductor oxide layer is split.
Constant torque shear head nut	The plug-in piece adjusts one size of the connection or terminal suitable for more types of wires.
Lubricated nut	The inserts help the conductor to be better centered and will not deform the conductor when the bolt is tightened.
Special features of mechanical terminals
Long handle	With extra long length, it can be used as a moisture barrier
Horizontal sealing is suitable	Suitable for indoor and outdoor applications

Installation

No special tools are required for the installation process, only a socket wrench. All types of  Shear Bolt utilize the same shortened length and contain the necessary inserts. A shear head nut design with tiered fixed torque is used to ensure a reliable connection. Each connector or cable lug comes with separate installation instructions. In order to prevent bending of the conductor, the use of a support tool is recommended (see accessories for details).

Selection Table

 

Product model	Wire crosssectionmm²	Size (mm)				Mounting holesdiameter	Number of Bolt	Bolt Across FlatAF(mm)	Peeling length(mm)
		L1	L2	D1	D2
BLMT-25/95-13	25-95	60	30	24	12.8	13	1	13	34
BLMT-25/95-17	25-95	60	30	24	12.8	17	1	13	34
BLMT-35/150-13	35-150	86	36	28	15.8	13	1	17	41
BLMT-35/150-17	35-150	86	36	28	15.8	17	1	17	41
BLMT-95/240-13	95-240	112	60	33	20	13	2	19	70
BLMT-95/240-17	95-240	112	60	33	20	17	2	19	70
BLMT-95/240-21	95-240	112	60	33	20	21	2	19	70
BLMT-120/300-13	120-300	120	65	37	24	13	2	22	70
BLMT-120/300-17	120-300	120	65	37	24	17	2	22	70
BLMT-185/400-13	185-400	137	80	42	25.5	13	3	22	90
BLMT-185/400-17	185-400	137	80	42	25.5	17	3	22	90
BLMT-185/400-21	185-400	137	80	42	25.5	21	3	22	90
BLMT-500/630-13	500-630	150	95	50	33	13	3	27	100
BLMT-500/630-17	500-630	150	95	50	33	17	3	27	100
BLMT-500/630-21	500-630	150	95	50	33	21	3	27	100
BLMT-800-13(custom made）	630-800	180	105	61	40.5	13	4	19	118
BLMT-800-17(custom made）	630-800	180	105	61	40.5	17	4	19	118
BLMT-800/1000-17	800-1000	153	86	60	40.5	17	4	13	94
BLMT-1500-17（custom made）	1500	200	120	65	46	17	4	19	130

Torque Terminal

TYPE	Cross section range mm²	Number of Contact bolts	Bolt head size(mm)	Plate hole size(mm)	Length(mm)		Inner Diameter(mm)	Outer Diameter(mm)
			AF(mm)	LB	L1	L2	D2	D1
BLMC-25/95	25-95	1	13	16.3	77.5	31.5	12.8	29
BLMC-95/240	95-240	2	13	16.3	107.5	61.5	20	34..5
BLMC-120/300	120-300	2	13	16.3	112.5	66.5	24	38
BLMC-185/400	185-400	3	13	16.3	155	100	25.5	50
BLMC-500/630	500-630	3	27	16.3	155	100	33	50

Required Tools

Connector or cable lug: separate installation instructions are included.

Support tool: recommended to prevent conductor bending.

Suitable A/F hexagon socket.

Ratchet or electric impact wrench.

Clamps: highly recommended to support conductors and ensure stability when pressure is applied.

Installation Steps

1. Confirm the correct size of the selected terminal according to the product selection guide, ensuring that the conductor size matches the cable and terminal labeling.
2. Unscrew the shear force bolt to ensure there is enough room to insert the cable.
3. Trim the conductor evenly according to the recommended stripping length to avoid over-cutting.
4. Carefully insert the conductor into the bottom of the torque terminal.
5. Tighten the shear bolt to hold the conductor securely in place. When using a ratchet or electric impact wrench, apply force gradually in the order of 1-2-3, applying a torque of 15N-m for the first time.
6. Repeat the second and third 15N-m torque application until the bolt head is completely severed.
7. Continue the cutting process, making sure to start with 1-2-3 each time and secure the terminal during cutting.
8. Check the cut and remove any residual lubricant.