OEM extruded heat sink service: copper-alloy CuZn37, 1.0 mm fins at 4.0 mm pitch, 0.05 mm over 100 mm flatness, 0.35 K/W thermal resistance. MOQ 500 pcs, shi...
OEM extruded heat sink service: copper-alloy CuZn37, 1.0 mm fins at 4.0 mm pitch, 0.05 mm over 100 mm flatness, 0.35 K/W thermal resistance. MOQ 500 pcs, shi...
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OEM extruded heat sink service from BQUQ uses CuZn37 copper alloy with 1.0 mm fins and a 3.0 mm base flat to 0.05 mm over 100 mm, rated 0.35 K/W at ΔT = 60 K. Stamping holds fin pitch within ±0.03 mm across a 120,000 pcs run on a 160 T press with an 18 s cycle. Black anodize Type II, 10-15 µm is standard.
OEM extruded heat sink service from BQUQ uses CuZn37 copper alloy with 1.0 mm fins and a 3.0 mm base flat to 0.05 mm over 100 mm, rated 0.35 K/W at ΔT = 60 K. Stamping holds fin pitch within ±0.03 mm across a 120,000 pcs run on a 160 T press with an 18 s cycle. Black anodize Type II, 10-15 µm is standard.
Our OEM extruded heat sink service uses copper-alloy CuZn37 with 1.0 mm fins and a 3.0 mm base flat to 0.05 mm over 100 mm. Rated 0.35 K/W at ΔT = 60 K, it supports VFD and inverter builds at 120,000 pcs monthly output with black anodize Type II, 10-15 µm as standard.
Stamping gives a repeatable 1.0 mm fin profile that extrusion cannot hold: the die forms every fin in one stroke, so pitch stays within ±0.03 mm across a 120,000 pcs run.
A single 160 T stroke forms the whole OEM extruded heat sink service, so part cost stops scaling with complexity. Tooling runs ±0.03 mm, and the 18 s cycle feeds a 120,000 pcs line.
One supplier now covers 1.0 mm to 1.0 mm fin gauges from the same 160 T press family, so a thermal redesign is a tooling change rather than a new vendor.
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Every stroke is dimensionally identical, so ±0.15 mm hole position carries across the batch. That is what makes VFD and inverter volume programs repeatable.
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The black anodize Type II, 10-15 µm finish is applied after forming, so corrosion protection does not get cut through at the fin roots the way it does on machined alternatives.
The standard material is copper-alloy CuZn37, supplied with black anodize Type II, 10-15 µm. For applications where VFD and inverter exposure is a concern, we recommend the passivated route; where conductivity matters more than weight, copper C110 raises thermal performance and roughly doubles unit mass.
General dimensions run to ±0.20 mm, with critical features such as ±0.05 mm on base thickness held separately. Formed geometry inherits tooling repeatability of ±0.03 mm, and hole position is held to ±0.15 mm. Tighter classes need an extra press operation, so it is worth deciding before tooling rather than after.
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Flatness is checked on a granite surface plate, 20 °C against a 0.05 mm over 100 mm limit, and fin pitch is verified optically at ±0.03 mm. Reports go out with each lot.
Each batch carries a CMM report from CMM plus 100% hydraulic press leak test. We record flatness, pitch, base thickness and hole position, and flag anything outside ±0.20 mm before it leaves the line.
Sampling is AQL 0.65 for critical dimensions and 1.5 for general, with CMM plus 100% hydraulic press leak test on every first article. Deviations beyond ±0.20 mm trigger a full-lot sort.
We inspect 1.0 mm fin tips for burr and crack after forming, because stamping can split a root without shifting any drawing dimension. Burr limit is set per part.
VFD and inverter programs are the reason this geometry exists. Where the enclosure cannot grow taller, fin density is the only lever, and 4.0 mm pitch with 1.0 mm stock is the practical ceiling for aluminium.
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Where a OEM extruded heat sink service runs at VFD and inverter volumes, part-to-part consistency decides field returns. ±0.03 mm on a 120,000 pcs run keeps the thermal curve inside one band.
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Designers working on VFD and inverter ask for flatness before they ask for thermal data, because VFD and inverter assembly is automated and a non-flat base stops the line.
VFD and inverter designs often run a 2.0 m/s forced-air path. 0.35 K/W at ΔT = 75 K, forced air 2.0 m/s means VFD and inverter can hold its target with fan power below the acoustic limit.
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| Parameter | Value / Range |
|---|---|
| Material | copper-alloy CuZn37 |
| Fin thickness | 1.0 mm |
| Fin pitch | 4.0 mm |
| Fin height | 15 mm |
| Base thickness | 3.0 mm |
| Base flatness | 0.05 mm over 100 mm |
| Thermal resistance | 0.35 K/W |
| Thermal test condition | ΔT = 75 K, forced air 2.0 m/s |
| Surface finish | black anodize Type II, 10-15 µm |
| Size range | 80 x 60 x 35 mm |
Every lot is inspected with CMM plus 100% hydraulic press leak test, and the report is included in the shipment. We check 0.05 mm over 100 mm, 4.0 mm, 3.0 mm and hole position against ±0.20 mm. Lot traceability from coil to carton is kept for 10 years.
Yes, we ship as-pressed for customers who do their own finishing. The risk is handling marks on 1.0 mm fins, so we pack those parts with interleaving sheets inside PE bag + honeycomb carton, 15 kg per carton.
The family covers 80 x 60 x 35 mm, with unit weights from 15 g. Because the base is pressed, new sizes are a die insert change rather than a new press line, so development is usually 2 weeks rather than 8.
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The key is avoiding a second metal at the wet contact area. We recommend black anodize Type II, 10-15 µm and, where the part touches an aluminium chassis, an isolating washer. Tell us the mating material and we will specify the coating accordingly.
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Skived fins are milled, so you get thin, tall fins and higher density in a given height, but the cost scales directly with fin area. Stamping gives the same result in one stroke at a much lower unit cost below 120,000 pcs. For VFD and inverter in a fixed-height enclosure, stamped is normally the right answer.
Source-direct from Dongguan: coil stock, forming, surface treatment and inspection happen in one building, so 0.05 mm over 100 mm flatness is verified before the part is packed.
Our VFD and inverter experience runs back to the first tooling programme in 2015. That history is why the standard black anodize Type II, 10-15 µm and ±0.20 mm are conservative rather than optimistic.
The factory holds ISO9001 and can ship RoHS and REACH documentation with the PE bag + honeycomb carton, 15 kg per carton. Third-party SGS inspection is arranged on request before the container is sealed.
Request a quote: sc@bquq.com | WhatsApp +86 13713157787 | Dongguan, China
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| Parameter | Value / Range |
|---|---|
| Material | CuZn37 copper alloy |
| Tolerance | ±0.03 mm fin pitch; ±0.15 mm hole position; 0.05 mm flatness over 100 mm |
| Lead time | Not specified in excerpt |
| MOQ | Not specified in excerpt |
| Capacity | 120,000 pcs monthly output; 18 s cycle on 160 T press |
| Option | Best for | Trade-off |
|---|---|---|
| Stamped 1.0 mm fin profile | Repeatable fin pitch within ±0.03 mm across 120,000 pcs | Requires 160 T press tooling; extrusion cannot hold this profile |
| Extruded heat sink | Continuous fin profiles with lower tooling complexity | Cannot achieve the 1.0 mm fin pitch tolerance of stamping |
| Machined alternative | Prototype or low-volume complex features | Black anodize can be cut through at fin roots; higher part cost scaling with complexity |
| Black anodize Type II, 10-15 µm | Corrosion protection after forming on VFD and inverter builds | Applied post-forming; not a substitute for dimensional control |
| Single 160 T stroke | Part cost stops scaling with complexity | Dedicated tooling runs ±0.03 mm; changeover is a tooling change |
| Stage | Control | Record |
|---|---|---|
| Tooling | Tooling runs ±0.03 mm | Tooling dimensional report |
| Stamping | 160 T stroke forms whole part in 18 s cycle | Cycle time and press log |
| Fin profile | Fin pitch stays within ±0.03 mm across 120,000 pcs run | Batch dimensional inspection |
| Hole position | ±0.15 mm hole position carries across the batch | Hole position inspection record |
| Surface finish | Black anodize Type II, 10-15 µm applied after forming | Coating thickness record |
| Final inspection | Inspection before every shipment | Shipment inspection report |
The standard material is copper-alloy CuZn37. It supports 1.0 mm fins and a 3.0 mm base flat to 0.05 mm over 100 mm, with a rated 0.35 K/W at ΔT = 60 K for VFD and inverter builds at 120,000 pcs monthly output.
Stamping holds fin pitch within ±0.03 mm across a 120,000 pcs run. The 160 T die forms every fin in one stroke, so pitch stays consistent and hole position of ±0.15 mm carries across the batch.
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Stamping gives a repeatable 1.0 mm fin profile that extrusion cannot hold. The die forms every fin in one stroke, so pitch stays within ±0.03 mm across a 120,000 pcs run, and a single 160 T stroke forms the whole part.
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A single 160 T stroke forms the whole OEM extruded heat sink service, with an 18 s cycle feeding a 120,000 pcs line. Tooling runs ±0.03 mm, so every stroke is dimensionally identical across the batch.
Black anodize Type II, 10-15 µm is standard. It is applied after forming, so corrosion protection does not get cut through at the fin roots the way it does on machined alternatives. This supports VFD and inverter volume programs.
Yes. One supplier now covers 1.0 mm to 1.0 mm fin gauges from the same 160 T press family, so a thermal redesign is a tooling change rather than a new vendor. Tooling runs ±0.03 mm and the 18 s cycle feeds a 120,000 pcs line.
The OEM extruded heat sink service is rated 0.35 K/W at ΔT = 60 K. It uses CuZn37 with 1.0 mm fins and a 3.0 mm base flat to 0.05 mm over 100 mm, supporting VFD and inverter builds at 120,000 pcs monthly output.
| Parameter | Value / Range |
|---|---|
| Material | CuZn37 copper alloy |
| Tolerance | Fin pitch ±0.03 mm; base flat 0.05 mm over 100 mm; hole position ±0.15 mm |
| Lead time | Not specified in article |
| MOQ | Not specified in article |
| Capacity | 120,000 pcs monthly output; 160 T press; 18 s cycle |
| Option | Best for | Trade-off |
|---|---|---|
| Extruded heat sink | Simple profiles, lower tooling cost | Cannot hold 1.0 mm fin pitch as tightly as stamping |
| Stamped heat sink | Repeatable 1.0 mm fin profile, high volume | Requires stamping tooling; pitch ±0.03 mm |
| CuZn37 copper alloy | Thermal conductivity and stamping formability | Material cost higher than aluminum |
| Black anodize Type II, 10-15 µm | Standard surface finish, corrosion resistance | Adds process step; thickness range fixed |
| 160 T press with 18 s cycle | 120,000 pcs runs | Cycle time limits throughput per press |
BQUQ uses CuZn37 copper alloy. This material supports 1.0 mm fins and a 3.0 mm base flat to 0.05 mm over 100 mm. The rated thermal performance is 0.35 K/W at ΔT = 60 K. Black anodize Type II, 10-15 µm is standard.
Stamping holds fin pitch within ±0.03 mm across a 120,000 pcs run. The 160 T press with an 18 s cycle forms every fin in one stroke. This repeatability is tighter than extrusion can hold for a 1.0 mm fin profile.
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The rated thermal resistance is 0.35 K/W at ΔT = 60 K. This value applies to the CuZn37 copper alloy design with 1.0 mm fins and a 3.0 mm base. It supports VFD and inverter builds.
Black anodize Type II, 10-15 µm is standard. This finish is applied after stamping and before final inspection. It provides corrosion resistance and a consistent appearance for VFD and inverter applications.
Capacity is 120,000 pcs monthly output. The line uses a 160 T press with an 18 s cycle. Tooling runs ±0.03 mm, and one supplier covers 1.0 mm to 1.0 mm fin gauges from the same press family.
Hole position tolerance is ±0.15 mm. Every stroke is dimensionally identical, so this tolerance carries across the 120,000 pcs run. The 160 T press and 18 s cycle support this repeatability.
Base flatness is controlled to 0.05 mm over 100 mm. This is achieved through the stamping die and verified during inspection before every shipment. The 3.0 mm base supports this flatness specification.
| Parameter | Specification |
|---|---|
| Material | copper-alloy CuZn37 |
| Fin thickness | 1.0 mm |
| Fin pitch | 4.0 mm |
| Fin height | 15 mm |
| Base thickness | 3.0 mm |
| Base flatness | 0.05 mm over 100 mm |
| Thermal resistance | 0.35 K/W |
| Surface finish | black anodize Type II, 10-15 µm |
| Monthly capacity | 120,000 pcs |
| MOQ (prototype) | 500 pcs |
| Lead time (production) | 20 working days |
| Size range | 80 x 60 x 35 mm |
