Aluminum Extrusion Profile
Why choose us
Incoming material and process control:
T-nut stock is confirmed by material before production, whether that is carbon steel, stainless steel, aluminium, brass or nylon, and D912 bolts are inspected for black oxide or zinc plating as they arrive. Angle brackets are identified as extruded or die-cast, because the process decides where the fitting can be used.
Tolerance and accuracy verification:
D912 bolts are produced to DIN912 dimensional tolerance, and lots are tested beyond a visual pass: surface hardness, torsion test and salt spray test confirm that the connection holds and the plating survives. T-nut thread engagement and the 3 mm clearance over the shank diameter are checked before packing.
Matching components and assemblies:
Profile, corner bracket, T-nut and bolt are quoted as one joint. Assembly puts the bolt and T-nut loosely on the corner piece, slides the nut along the profile groove, fits the spring washer and tightens. Matching slot size, nut type and bolt length up front is what avoids a second shipment on site.
Engineering and quotation response:
Send the frame drawing, the load and the environment, and we confirm section, bracket and fastener before quoting. Custom profiles opened from your own equipment requirements, cut lengths and finish options are quoted the same way, with enquiries answered within 24 hours and dimensions confirmed in writing.
An aluminum extrusion profile only looks like a commodity until you have to join two of them. The slot size decides which T-nut and bolt will actually seat, the section decides how much load the span will carry without bowing, and the surface finish decides whether the frame survives a wet workshop or belongs in a clean room. Buy the aluminum profile, the bracket and the fastener as one joint and the frame goes together without welding; buy them separately and you spend the assembly time filing.
How to choose an aluminum extrusion profile
Five decisions cover most frame projects, and the order matters, because the slot is fixed once the profile is cut.
- ▪Load first. Different profile specifications carry different bearing loads, which is why the section is chosen before anything else and the accessories are matched to that section. A guard panel and a moving gantry do not deserve the same member.
- ▪Connection angle second. Two members meeting at 90 degrees are held by a standard corner bracket. Anything that meets off-axis needs a steering angle piece, because those fittings are die cast rather than extruded, and the die-cast process is what produces the geometry for non-vertical, non-horizontal joints.
- ▪Then the fastener chain. The T-nut slides into the profile groove and takes the bolt; the joint is only as good as that match. For a T-nut going into wood or a composite panel, drill the hole about 3 mm larger than the shank diameter. Where the back of the workpiece cannot be reached, use a blind-hole type; where a wrench has to get in, use the hex head type.
- ▪Environment fourth. Humid workshops, wash-down areas and curtain wall work point to the aluminum corner bracket for its corrosion resistance. Moisture or chemical exposure calls for an electroplated T-nut in zinc, nickel or chrome; outdoor and marine work calls for stainless steel; a dry indoor assembly is fine with carbon steel under a black oxide finish.
- ▪Installation last. If the frame will be dismantled and moved, the bolted T-slot system is the reason to choose extrusion at all: no welding, light members, and a joint that can be reopened without cutting anything out.
Aluminum extrusion profile series overview
Four families cover the whole assembly. The table shows what each is for and where it stops being the right answer.
| Family | Typical sizes / models | Structure | Fit and finish | Typical use |
|---|---|---|---|---|
| CNC extrusion (T-slot aluminum profile) | 20 x 40 mm and 30 mm sections, metric 2020 and 4040 sizes | T-shaped grooves on the faces, anodized surface, assembled by bolting | Profile specification matched to the bearing load, accessories matched to the same section | Machine frames, guards and covers, workbenches, conveyor and testing equipment, shelves, clean rooms |
| Aluminum corner | 90 degree corner bracket, reinforced steel plate version, die-cast steering angle piece | Aluminum alloy body, steel plate reinforcement on the loaded version, die casting for steering angles | Type and material of the bracket chosen by the force on the connected members | Equipment frames joining two profiles that are neither vertical nor horizontal; curtain wall and furniture assembly; humid workshops |
| T-type nut | Standard, through-hole, blind-hole, hex head, shoulder, electroplated, stainless steel, carbon steel, machine screw and adjustable types | Two prongs locking into the T-slot groove, threaded bore, bevelled thread, spring washer used on assembly | Steel, aluminium, brass or nylon; electroplated for moisture, stainless for outdoor work | Bolted profile joints, furniture assembly, mechanical maintenance, fastening wood and composite panels flush |
| D912 bolt | DIN912 hex socket cap screw, metric thread 1.4-100 mm | Cylindrical head with hexagonal socket, installed with a hexagon wrench | Black oxide or zinc plated; strict dimensional tolerance and accuracy | Mechanical installation, construction, electrical and automotive assembly with the T-nut |
Key specs of this aluminum extrusion profile range
The material figures below are the ones buyers ask us to confirm in writing, because they explain why extrusion is chosen over steel in the first place.
- ▪Density of 2.7 g/cm³, against 7.83 g/cm³ for steel and 8.93 g/cm³ for copper or brass, so a member of the same stiffness band is roughly a third of the weight to lift into place.
- ▪Thermal conductivity around 50-60% of copper, which is why the same alloy family is used for heat sinks and heat exchanger bodies.
- ▪Electrical conductivity of about half that of copper on an equal-weight basis, and non-ferromagnetic, which keeps extruded members usable in electrical and electronic assemblies.
- ▪Not self-igniting, so profiles are acceptable where parts are handled near flammable or explosive materials.
- ▪Surface oxidation gives a finish that resists dirt and wipes clean even after oil contact, which matters on machine guards and workshop furniture.
- ▪T-nut installation calls for a pilot hole about 3 mm larger than the shank diameter, and the nut stays put under vibration and torque once seated in the groove.
- ▪D912 bolts are produced to the DIN912 standard with metric thread diameters from 1.4 mm to 100 mm, in black oxide or zinc plating.
- ▪Aluminium is extremely recyclable, and recycled material is almost indistinguishable in properties from virgin metal, which keeps scrap value in the frame even at end of life.
Where an aluminum extrusion profile is used
The demand comes from equipment builders rather than from one single industry, and the aluminum extrusion profile is usually the first thing specified on the drawing.
- ▪Industrial production and manufacturing: main frames and cover skeletons for automated machinery, assembly line conveyor belts, hoists, glue dispensers, testing equipment and shelving.
- ▪Electronics manufacturing and clean rooms, where the profile can be wiped down and carries no magnetic signature.
- ▪Equipment frames that need to connect two profiles at an angle other than vertical or horizontal, using die-cast steering angle pieces.
- ▪Building and decorative work: curtain wall installation, furniture assembly and interior trim, where a corner bracket is the standard connector.
- ▪Fastener applications beyond frames: D912 bolts are used across construction, electrical, mechanical and automotive work where a hex socket head has to sit in a counterbore.
Parts to buy with the profile: the corner bracket carries the joint, the T-nut locks it inside the groove and the D912 bolt closes it, with a spring washer between. Assembly is done in that order, with the nut and bolt fitted loosely to the bracket first, then slid down the groove and tightened. Matching slot, nut and bolt length at the quotation stage is what prevents a second shipment halfway through an installation.
What buyers can verify
Every claim on this page is testable at goods-in or on a sample order, and we would rather you checked than assumed.
- ▪Material grade of the fastener: T-nuts can be supplied in steel, stainless steel, aluminium, brass or nylon, and the grade on the packing matches the grade quoted.
- ▪Surface treatment: black oxide or zinc plating on D912 bolts, and the finish can be confirmed by the plated appearance and the test report, not by description alone.
- ▪Mechanical and chemical testing on bolt lots: surface hardness, torsion test and salt spray test, on top of the routine appearance inspection.
- ▪Dimensional check against the standard: D912 threads are gauge-checked across the quoted diameter, with stable connection and no loosening in service.
- ▪Process identification on angle fittings: extruded angle fittings and die-cast steering angle pieces are different products, and the buyer can tell which one is being supplied before ordering.
- ▪Production monitoring: the parts are inspected through the process rather than only at the end, so a deviation is caught while the run is still open.
Send the frame drawing or the load case and we will confirm the section, the bracket and the fastener together, because an aluminum extrusion profile is only as good as the joint holding it. Custom profiles opened from your own equipment requirements, cut lengths and finish options are quoted on the same basis, with the dimensions confirmed in writing before production.