T Bolts For Railway Using | China Rail Fastener Manufacturer

Material

Q235, 45#, 40Cr, 35 Crmo, 42 Crmo

Grade

4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 10.9, 12.9

Specification

M16-M100

Surface Treatment

Black Oxide, Zinc plated, HDG, Galvanized, Plain (Oiled), Dacromet

Application

Railroad, Subway, Metro

Product Description

The head of the T-type railway track bolt is T-shaped. Some specially designed T-bolts also have tooth structures at both ends of the head, or chamfers are set on the upper part of the bolt cap, which can increase the mechanical friction coefficient with the track, making the connection between the bolt and the track more secure and preventing vibration and loosening.

Nuts Compatible With T bolts

Nylon anti-loosening nut: The nylon pad inside it can increase the friction with the T-bolt screw, effectively prevent the nut from loosening in a vibrating environment, and improve the reliability of the connection. It is suitable for railway track parts with high anti-loosening requirements.
Flange nut: It has a larger support surface, which can increase the contact area with the connected parts, disperse the pressure, and make the connection more stable. In some track connection parts with high stability requirements and need to withstand large lateral forces, flange nuts are used in combination with T-bolts.
Ordinary hexagonal nuts: Simple structure and easy to use. In some ordinary railway track connections that do not require particularly high anti-loosening and stability, ordinary hexagonal nuts are used to connect with T-bolts. Generally, they are used with spring washers or flat washers to enhance anti-loosening performance.

Additional information

Material	Q235, 45#, 40Cr, 35 Crmo, 42 Crmo
Grade	4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 10.9, 12.9
Specification	M16-M100
Surface Treatment	Black Oxide, Zinc plated, HDG, Galvanized, Plain (Oiled), Dacromet
Application	Railroad, Subway, Metro

Specification Of T Bolts

The following are the specifications of T bolts commonly used in railway tracks:

Thread Specification d	M12	M14	M16	M20	M22	M24	M27	M30
b when l≤125	30	34	38	46	50	54	60	66
b when 125＜l≤200	36	40	44	52	56	60	66	72
b when l＞200	48	52	57	65	69	73	80	85
d₁	12	14	16	20	22	24	27	30
D	30	34	38	46	50	58	68	75
K max	9.29	10.29	12.35	14.35	15.35	16.35	18.35	20.42
h	6.5	7.2	9	10.4	11	11.8	13.5	14.5
S	22	24	28	34	36	44	50	57
X max	4.2	4.5	5	6.3	6.5	7.5	8	8.8
l Length Range	45 – 120	50 – 140	55 – 160	65 – 200	70 – 220	80 – 240	90 – 260	100 – 300

Application of T bolts

The application of T-bolts is widely distributed in various industries in society. On railway tracks, T-bolts can be mainly used in the following scenarios:

Connection between rails and sleepers

It is used to fix the rails on the sleepers. Through the T-bolts, the corresponding holes on the rails and sleepers are passed through, and the nuts are tightened to form a stable whole between the rails and sleepers, ensuring the position accuracy and stability of the rails when the train is running. For example, it is widely used in the track laying of ordinary railways and high-speed railways.

Fixing of turnout structure

In the turnout area, T-bolts are used to fix various components of the turnout, such as point rails, basic rails, turnout sleepers, etc., to ensure that the turnout maintains a reliable connection and correct position when the train passes and switches frequently, and to ensure that the train passes the turnout safely and smoothly.

Installation of track ancillary facilities

It is used to install some ancillary facilities on the track, such as track pads, gauge baffles, anti-climbing devices, etc., so that these ancillary facilities can be closely connected with the rails and sleepers to play their due functions. For example, the track pads can be fixed to the sleepers through T-bolts to play a buffering and shock-absorbing role.

Track fixing in tunnels and bridges
In special areas such as tunnels and bridges, T-bolts connect the track to the embedded channel on the tunnel wall or the fixed structure on the bridge, adapting to special engineering environments and force requirements to ensure the stability of the track in tunnels and bridges.