CRA-300 Airway Buffs Ventilated Buffs Forming Iris Machine (OD 100-250 mm)
The CRA-300 forms small bias airway buffing wheels, also known as ventilated buffs or wood banding wheels, with outer diameters from 100 mm to 250 mm. It takes prepared bias fabric or sisal and an iron claw or iron plate to fold, index and clamp the material into a finished wheel body. One operator...
Product Overview
The CRA-300 forms small bias airway buffing wheels, also known as ventilated buffs or wood banding wheels, with outer diameters from 100 mm to 250 mm. It takes prepared bias fabric or sisal and an iron claw or iron plate to fold, index and clamp the material into a finished wheel body. One operator runs the machine. It is the forming step in a four-machine line: bias cutting on the CRA-500, forming here, pressing on the CRA-600, and edge trimming on the CRA-700. This machine is designed for small wheels used in jewellery polishing, bench grinders, and edge finishing on wood panels.
Key Benefits
- One worker replaces a bench of hand folders on the small airway wheel forming step
- Covers the 100 to 250 mm diameter range used in jewellery, bench tools, and wood edge finishing
- Runs soft untreated fabric and resin treated fabric or sisal on the same machine
- Rated output up to 5000 pieces per day on a full shift pattern
- Accepts 2 inch, 2.5 inch iron claws and iron plates with round or hexagon holes
- Control interface and machine language are in English so the operator manual matches the panel
Application Scenarios
- A jewellery polishing workshop needing consistent small airway wheels for hand tools
- A wood panel manufacturer adding edge buffing in house instead of buying pre-made wheels
- A small buffing wheel factory expanding into the 100 to 250 mm market for bench grinder wheels
- A workshop already using a CRA-500 bias cutter and needing the forming step for small wheels
Who It Is For
- Jewellery polishing workshops
- Wood panel and furniture edge finishing lines
- Small-scale buffing wheel manufacturers
- Metal finishing shops using small airway wheels for hand tools
Problems It Solves
- Hand formed small airway wheels vary in ply spacing, leading to inconsistent finish quality
- Manual folding limits daily output and ties up multiple workers per shift
- Buying small airway buffs abroad adds freight and lead time to every reorder
- Changing wheel diameter by hand requires retraining rather than a clamp change
Technical Features
- Hydraulic system with left and right cylinders acting on the trestle and turntable
- Left and right upper spandex clamps hold the material stack during indexing
- Circuit board and pressure gauge on a single control panel
- Turntable indexes the wheel body between folds so ply spacing repeats
- Cutter section trims the formed body before it leaves the machine
- Adjustable batching speed so soft fabric and hard treated sisal both run stable
Specifications
| Model | 300 Airway Buffing Wheel Forming Machine |
|---|---|
| Machine Size | 2.4 m x 0.8 m x 1.5 m |
| Voltage | 380 V three phase four wire, customisable |
| Power | 6 kW |
| RPM of Batching | Adjustable |
| Max Buff Diameter | 250 mm |
| Min Buff Diameter | 100 mm |
| Finishing Pressure | 7 MPa |
| Moulding Press | 7 MPa |
| Max Output | 5000 pieces per day |
| Operators Required | 1 |
Values taken from the manufacturer data for this model. Anything not listed is confirmed on request before order.
Materials
- Soft untreated cotton fabric
- Resin treated fabric in yellow, blue, green or red
- Sisal cloth and sisal stitched with cloth
- Iron claw centres in 2 inch and 2.5 inch
- Iron plate centres with round hole or hexagon hole
Manufacturing And Process
Step 1
Prepare bias fabric or sisal rolls, on a CRA-500 bias cutting and rolling machine or an equivalent
Step 2
Load the roll and select the iron claw or iron plate for the wheel centre
Step 3
Set the batching speed and clamp set for the target outer diameter
Step 4
The turntable indexes and the cylinders fold and clamp each ply onto the centre
Step 5
The formed body is trimmed and unloaded, then goes to pressing on a CRA-600
Step 6
Edge cutting on a CRA-700 gives the finished wheel its running face
Quality Control
- Hydraulic pressure held at 7 MPa on both moulding and finishing so ply density repeats
- Sample wheels formed and checked before the machine ships
- Free sample testing on the buyer's own fabric or sisal before purchase
- Installation and operation training given so the first production run is supervised
Customization Options
- Voltage and phase configured for the destination market
- Clamp sets supplied for the diameter bands the buyer actually sells
- Iron claw or iron plate tooling matched to the buyer's existing centres
- Machine can be quoted as part of a CRA-500, CRA-300, CRA-600, CRA-700 line
Compared With The Alternatives
| CRA-800 Bias Airway Buffs Forming Machine | The CRA-800 covers 200 to 600 mm wheels; choose it for larger production wheels and the CRA-300 for 100 to 250 mm small wheels |
|---|---|
| CRA-360 Airflow Corrugated Buffs Making Machine | The CRA-360 forms corrugated or weave buffs, a different wheel structure, not ventilated airway wheels |
| Manual airway wheel folding | Hand folding needs no capital outlay but cannot hold ply spacing across operators or reach 5000 pieces a day |
Use Guide
- Confirm your incoming fabric or sisal is cut on the bias before forming; straight cut material will not fold evenly
- Change the clamp set to move to another diameter band; a set change takes about the same effort as a tooling swap and is not a daily operation
- Keep the hydraulic pressure gauge at the set 7 MPa; a drop shows in loose ply spacing before it shows in the wheel diameter
- Send the formed bodies to pressing the same shift so the ply stack does not relax
- Contact us on WhatsApp for the English operation video if the operator is new to airway forming
CRA-300 Airway Buffs Ventilated Buffs Forming Iris Machine (OD 100-250 mm) FAQ
What diameter of airway buffs can this machine make?
From 100 mm to 250 mm outer diameter. For 200 to 600 mm wheels use the CRA-800 instead.
How many people are needed to run it?
One operator. The clamping, indexing and trimming are handled by the machine's hydraulic and control system.
What is the daily output?
Up to 5000 pieces per day at maximum rate. Real output depends on diameter, ply count and material.
Do I need other machines to make a finished wheel?
Yes. Bias fabric preparation comes before forming, and pressing and edge cutting come after. We supply the CRA-500, CRA-600 and CRA-700 for those steps.
What is the lead time?
5 to 15 workdays if the machine is in stock, otherwise 15 to 60 workdays depending on quantity and model.
What are the payment terms?
Orders up to 10000 USD are 100% in advance. Above 10000 USD it is 30% T/T deposit with the balance before shipment.
Can you test my own fabric before I buy?
Yes, sample testing is free. You cover the freight and send the specific material you plan to run.
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