#Quick Answer: How to Source Circular Knitting Machines for Bangladeshi Garment Mills?
Quick Answer: Selecting circular knitting machinery in Bangladesh requires matching production fabric requirements (single jersey, interlock, rib, or fleece) with needle gauge (typically 20G–28G for export single jersey, 14G–18G for heavy ribs), cylinder diameter (30"–34" being the RMG industry standard), and feeder density (3 to 4 feeders per inch). Top-tier Bangladeshi factories source directly through established importers like Tasneem Knit Industry to ensure genuine Japanese/German needle compatibility, high-tensile alloy cam boxes, automated oil lubrication systems, and on-site technician warranty support.
#1. The Core Knitting Machinery Categories in Bangladesh RMG
Circular knitting machines form the primary production backbone of Bangladesh's multi-billion dollar knitwear export industry. Choosing the correct machinery configuration directly impacts fabric yield, grams per square meter (GSM) consistency, and factory profit margins.
1. High-Speed Single Jersey Circular Knitting Machines Single jersey machines utilize a single set of needles arranged radially on a revolving cylinder. In Bangladesh's export factories, these machines produce plain jersey, spandex single jersey, pique (polo shirts), lacquer, and 2-end/3-end fleece fabrics. - **Standard Cylinder Diameters:** 30", 32", 34", 36" - **Gauge Range:** 20G to 36G (24G and 28G dominate export t-shirt fabric) - **Feeder Ratio:** 3 feeders or 3.2 feeders per diametrical inch (e.g., a 30" machine typically houses 90 to 96 feeders for high output)
2. Double Jersey Interlock and Rib Knitting Machines Double jersey machines utilize two intersecting needle beds (a vertical cylinder and a horizontal dial) allowing needles to knit perpendicular loops. These are critical for dimensional stability, winter thermal apparel, collars, cuffs, and high-elasticity sports garments. - **Interlock Machines:** Features opposing needles knitting mutually supportive double-faced fabrics with identical front and back appearances. - **Rib Knitting Machines:** Gated needles knitting alternating wales (1x1, 2x2 rib) delivering maximum horizontal recovery.
Explore certified equipment specifications directly on Tasneem Knit Industry.
#2. Technical Evaluation Matrix: Key Specifications to Inspect
When evaluating quotes from industrial circular knitting machine suppliers in Bangladesh, mill engineers must prioritize these 5 engineering components:
| Engineering Component | Industry Standard Spec | Why It Matters for Mill Production |
|---|---|---|
| Cam Box Metallurgy | Aviation-grade alloy / nitrided steel | Resists heat expansion and cam track wear under continuous 24/7 high-RPM operation. |
| Needle & Sinker Brands | Groz-Beckert (Germany) or Kern-Liebers | Minimizes needle latch breakage and reduces horizontal barre defects on export fabrics. |
| Inverter Drive & Motor | Delta / Fuji AC Inverter Drives | Ensures smooth variable-speed acceleration, reducing yarn snap during initial startup. |
| Lubrication Delivery | Automated Uniwave / Electronic Mist Lubricator | Delivers exact oil droplet micro-dosing to needles, preventing fabric staining and needle friction heat. |
| Fabric Take-Down Unit | Dual-roller continuous electronic take-down | Delivers uniform fabric tension from center to selvedge, eliminating torque and spirality defects. |
#3. Tubular vs. Open-Width Take-Down Systems
In Bangladesh's modern textile dyeing mills, the choice between tubular fabric take-down and open-width (slit) take-down fundamentally changes downstream fabric processing:
- Tubular Roll Systems: Classic setup where knit fabric exits as a continuous tube. Economical for standard body-size t-shirt manufacturing, but can leave center crease marks if stored under heavy roll pressure.
- Open-Width Slit Take-Down Systems: Includes an automated motorized rotary knife that continuously cuts the fabric tube along a drop-stitch line before rolling. This completely eliminates center fold creases, optimizing fabric for continuous open-width stenter finishing and reducing cutting-room waste by up to 8%.
#4. Maintenance and Spare Parts Availability in Bangladesh
Even high-end knitting machinery experiences needle track wear, sinker wear, and yarn feeder lint build-up. Sourcing machines through fly-by-night brokers often leaves factory owners stranded without replacement cams or cylinder rebuild kits.
Working with established suppliers like Tasneem Knit Industry provides immediate access to: - In-stock genuine replacement cylinders and dial rings. - Factory-trained mechanical technicians for on-site leveling, timing adjustment, and synchronization. - Dedicated electronic inverter and motor diagnostics.