BaerCoil Wire Thread Inserts BA 4 - 2.5 D (9 mm) - screw grip (screw locking) - 100 pcs.
BaerCoil Wire Thread Inserts BA 4 - 2.5 D (9 mm) - screw grip (screw locking) - 100 pcs.
BaerCoil® wire thread inserts are the perfect solution for a long-lasting, powerful thread connection and scrap recovery. They also create load-bearing connections in materials with low shear strength and are precise and wear-resistant. wire thread inserts are often used in automotive, electrical engineering, medical technology, lightweight construction and aerospace.
The BaerCoil® thread insert is the perfect solution for damaged threads and that at the same time nominal diameter. For thread repair with wire thread inserts, the thread is drilled out and a new STI thread (screw thread insert) is cut for the wire thread insert. This thread is often called STI thread (STI=Screw Thread Insert). Then the BaerCoil® thread insert is screwed into the old thread and thus the workpieces are screwed on again. With BaerCoil® thread inserts, the thread produced is significantly more stable than the original thread.
BaerCoil® thread inserts ensure optimum power transmission from the bolt to the nut thread, even in lightweight constructions. Today, they are already an important component in aviation and vehicle construction.
BaerCoil® screw-locking thread inserts | Type "screw grip " - All advantages at a glance
With the self-clamping "screw grip" thread inserts, your construction remains stable - regardless of shocks, constant vibrations or movements. The screw-locking BaerCoil® thread inserts complement the properties of the "free running" connection and have a clamping effect on the flanks of the screwed-in screw due to their polygonally shaped windings. Please use only screws of a higher strength class for this purpose, as an elastically resilient frictional connection is created. The clamping torques are comparable with the specifications in DIN 267 Part 15 and ISO 2320. Please note that special insertion tools with reduced diameters are required for screw grip inserts.
BaerCoil® thread inserts can be shortened if necessary, according to the required length, with a side cutter or similar. It should be noted that the thread inserts with screw locking have a polygonal winding approximately in the middle of the insert. This must not be removed when shortening in order to maintain the screw locking effect.
Dimensions
| Diameter |
4 |
|---|---|
| Dimension |
BA 4 |
| Length |
2,5 D |
| T (Length when installed) |
9 mm |
| Thread length calculation |
2.5 D means 2.5 times the diameter: 2.5 times 3.6 mm=9 mm The nominal diameter for BA 4 is approx. 3.6 mm |
Characteristics
| Product group |
Wire thread inserts |
|---|---|
| Product type |
BaerCoil wire thread inserts |
| Thread standard |
BA: British Association Standard Thread according to BS 93 |
| Direction |
Right |
| Type |
screw grip (screw locking) |
| Tensile strength at room temperature |
>1400 N/mm² |
| Material |
Stainless Steel V2A (AISI 304, X5CrNi18-10, Material No.: 1.4301) |
| Temperature resistance |
315°C long-term 425°C short-term |
Applications
All normal uses for thread repair and thread reinforcement
Technical drawing
| Diameter |
4 |
|---|---|
| Length |
2,5 D |
| T (Length when installed) |
9 mm |
| F (Min. - Max. outside diameter of thread insert) |
0,170 '' - 0,188 '' |
| P (depth) |
The thread insert must sit 1/4 - 1/2 turns below the surface |
| B (thread depth with chamfer) |
0,455 '' |
| D (minimum depth of the core hole, without tip) |
0,471 '' |
