The T-bolt is literally understood to mean that the sha […]
The T-bolt is literally understood to mean that the shape of the bolt is like an uppercase English letter "T", which is a good name.
Since T-bolts (some also called T-screws or t-screws) are a big family, they must be full of children! In the work, I often encounter a lot of T-bolt consultations, the problems are very strange; Xiaobian as a senior T-bolt manufacturing expert, today we introduce the main classification of T-bolts and related channels:
First, by purpose
1.1 Huffen channel steel T-bolt, the most commonly used is 45# steel, forged, quenched and tempered; also useful for low carbon steel, more useful alloy steel, stainless steel 304 and 316; according to actual needs Choose materials and mechanical performance grades, chemical blackening, electro-galvanizing, hot dip galvanizing, Dacromet, mechanically galvanized and plated to Crowe and so on.
1.2 T-bolts for aluminum alloy profiles, also known as hammer bolts, SUS304 stainless steel and medium carbon steel, medium carbon steel T-screw surface can be galvanized or nickel plated and plated with Crowe, carbon steel T-bolt The material is 1045 medium carbon steel, which is produced by red satin process. After heat treatment, the grade is 8.8. Generally, it is a mold plate bolt. The T-screw can be directly placed in the groove. It can be automatically positioned and locked during the installation process. T-bolt is generally used. Used with the flange nut, it is the standard connecting fastener when installing the corner piece. T-bolt is selected according to the groove width of the profile.
1.3 T-bolts for water supply systems,
1.4 T-bolt for T-channel, generally refers to GB37-88
1.5 T-bolts for construction fasteners, mainly fixed by construction scaffolding, mainly low carbon steel production, generally with a flange nut. The most used are the M12, M14 and American standard UNC1/2-13 and the British standard BSW1/2-12 teeth.
Second, according to the standard model:
2.1 National standard GB37-88T groove bolts, this standard specifies the B-type T-slot bolts with thread size M5-M48. This national standard stipulates that the diameter is less than or equal to the M39 or less. The mechanical performance grade is generally 8.8. The mechanical performance grade larger than M39 is generally agreed with the customer; and the standard states: "T-shaped groove bolts for structural reasons No load shedding and head bar joint strength test is carried out. This standard has M5, M6, M8, M10, M12, M16, M20, M24, M30, M36, M42, M48, 12 specifications, the shortest length is 25, the longest 300.
Surface treatment is mainly chemical blackening and galvanizing passivation.
2.2 Machinery Industry Standard JB/T 8007.2-1999| Machine Tool Clamp Parts and Components T-Slot Quick Release Bolts;
2.3 German standard DIN787,
2.4 German standard DIN186 T square neck bolt;
2.5 German standard DIN188T double neck bolts;
2.6 German standard DIN261.