Cara Hitung Biaya Laser Cutting & Bending CNC: Kalkulator Lengkap untuk Budgeting Project
"Berapa biaya laser cutting untuk project saya?" — Pertanyaan ini kami terima 20-30 kali per hari di MK Metalindo. Dan jawabannya tidak pernah sesederhana "Rp X per meter".
Biaya fabrikasi logam terdiri dari 7 komponen yang saling terkait. Memahami breakdown ini berarti Anda bisa:
- Budget lebih akurat — mengurangi cost overrun
- Bandingkan quote apples-to-apples — tidak tertipu harga murahan
- Optimasi design untuk cost efficiency — hemat 10-25%
- Negosiasi lebih percaya diri — tahu mana yang reasonable
Artikel ini memberikan formula lengkap plus contoh kalkulasi nyata untuk project di Sidoarjo dan Surabaya.
📊 7 Komponen Biaya Fabrikasi Logam
1. MATERIAL COST (30-60% Total)
Formula: Volume Material × Density × Price/kg
Faktor yang mempengaruhi:
- Jenis material: Mild steel, stainless, aluminium
- Grade: 304 vs 316, 5052 vs 6061
- Thickness: 1mm vs 10mm (bukan linear cost)
- Finish: Mill finish, brushed, mirror
- Origin: Lokal vs import (quality, lead time)
Example Calculation: Plat stainless steel 304, 1000×500×3mm:
- Volume = 1000 × 500 × 3 = 1,500,000 mm³ = 0.0015 m³
- Density stainless = 7900 kg/m³
- Weight = 0.0015 × 7900 = 11.85 kg
- Price/kg (Sidoarjo) = Rp 52.000
- Material Cost = 11.85 × 52.000 = Rp 616.200
2. LASER CUTTING COST (15-30% Total)
Formula: Cutting Time × Machine Rate + Consumables
Faktor yang mempengaruhi:
- Material Type & Thickness:
- Mild steel 3mm: Rp 8.000-12.000/meter cutting
- Stainless 3mm: Rp 12.000-18.000/meter (butuh N2 gas)
- Aluminium 3mm: Rp 15.000-22.000/meter (fiber laser)
- Cutting Length Complexity:
- Simple straight cut: Rp 5.000-8.000/meter
- Complex contour: Rp 12.000-20.000/meter
- Small holes (<10mm): additional Rp 1.000-3.000/hole
- Nesting Efficiency:
- Good nesting (90%+): -15% cost
- Poor nesting (60%): +25% cost
- Quantity:
- 1-10 pcs: Full rate
- 11-50 pcs: -10% discount
- 51-100 pcs: -15% discount
- 100+ pcs: Negotiable (-20% to -30%)
Example Calculation: Cut 10 pieces bracket (mild steel 3mm):
- Total cutting length: 8.5 meters × 10 pcs = 85 meters
- Rate: Rp 10.000/meter (complex contour)
- Laser Cutting Cost = 85 × 10.000 = Rp 850.000
3. BENDING CNC COST (10-25% Total)
Formula: Setup Time + (Bending Time × Number of Bends) + Tooling
Faktor yang mempengaruhi:
- Number of Bends:
- 1-3 bends: Rp 15.000-25.000/bend
- 4-6 bends: Rp 12.000-20.000/bend
- 7+ bends: Rp 10.000-18.000/bend
- Bend Complexity:
- 90° standard: Base rate
- Acute/obtuse angle: +20-40%
- Radius bend: +30-50%
- Multiple bends in tight space: +25-40%
- Material & Thickness:
- Mild steel ≤3mm: Base rate
- Mild steel 4-6mm: +20-30%
- Stainless steel: +25-35% (work hardening)
- Aluminium: +15-25% (softer, but springback)
- Tooling Requirements:
- Standard tooling: Included
- Custom tooling: Rp 150.000-500.000 (one-time)
- Special V-die: Rp 300.000-800.000
Example Calculation: Bend 50 pieces (mild steel 2mm, 4 bends each):
- Setup time: 30 minutes = Rp 150.000
- Bending time: 2 minutes/piece × 50 = 100 minutes = Rp 500.000
- Total Bending Cost = Rp 650.000
4. WELDING & ASSEMBLY (5-20% Total)
- MIG welding: Rp 50.000-80.000/meter
- TIG welding: Rp 80.000-120.000/meter (stainless, aluminium)
- Spot welding: Rp 5.000-10.000/spot
- Assembly time: Rp 75.000-125.000/jam (technician)
5. SURFACE FINISHING (5-15% Total)
- Grinding & deburring: Rp 25.000-50.000/meter edge
- Polishing stainless: Rp 80.000-150.000/m²
- Powder coating: Rp 75.000-120.000/m² (include prep work)
- Galvanizing: Rp 35.000-60.000/kg (outsourced)
- Anodizing aluminium: Rp 50.000-90.000/m²
6. QUALITY CONTROL & DOCUMENTATION (3-8% Total)
- Dimensional inspection: Rp 25.000-50.000/feature
- Surface inspection: Rp 15.000-30.000/m²
- Documentation (certificate, report): Rp 50.000-150.000/project
7. PROFIT MARGIN (10-25% Total)
- Project complexity: Simple 10-15%, Complex 20-25%
- Customer relationship: Repeat client discount 5-10%
- Market positioning: Value-based vs price-based
🧮 KALKULASI PROJECT LENGKAP: Industrial Bracket
Project Spec:
- Item: Support Bracket for conveyor system
- Material: Mild steel, 5mm thickness
- Quantity: 100 pieces
- Drawing: CAD file provided
Step-by-Step Calculation:
1. Material Calculation:
- Plate size: 300 × 200 × 5mm per piece
- Volume per piece: 300 × 200 × 5 = 300,000 mm³ = 0.0003 m³
- Density mild steel: 7,850 kg/m³
- Weight per piece: 0.0003 × 7,850 = 2.355 kg
- Total weight: 2.355 × 100 = 235.5 kg
- Material price: Rp 14.500/kg (Sidoarjo local)
- Material Cost: 235.5 × 14.500 = Rp 3.414.750
2. Laser Cutting Calculation:
- Cutting length per piece: 1.8 meters (contour + holes)
- Total cutting length: 1.8 × 100 = 180 meters
- Rate: Rp 9.000/meter (mild steel 5mm, complex contour)
- Laser Cutting Cost: 180 × 9.000 = Rp 1.620.000
3. Bending CNC Calculation:
- Bends per piece: 3 bends (90°, 90°, 45°)
- Setup time: 45 minutes = Rp 225.000
- Bending time: 2.5 minutes/piece × 100 = 250 minutes = Rp 1.250.000
- Total Bending Cost: Rp 1.475.000
4. Welding & Deburring:
- Welding length: 0.6 meters/piece × 100 = 60 meters
- Welding cost: 60 × 65.000 = Rp 3.900.000
- Deburring: 180 meters edge × 35.000 = Rp 6.300.000
- Total Finishing: Rp 10.200.000
5. Quality Control:
- Inspect 20% sample: 20 pieces × Rp 40.000 = Rp 800.000
- Documentation: Rp 100.000
6. SUMMARY:
Material: Rp 3.414.750 (18.5%)
Laser Cutting: Rp 1.620.000 (8.8%)
Bending CNC: Rp 1.475.000 (8.0%)
Welding/Finish: Rp 10.200.000 (55.3%)
Quality Control: Rp 900.000 (4.9%)
SUBTOTAL: Rp 17.609.750
Profit (15%): Rp 2.641.463
TOTAL PROJECT: Rp 20.251.213
7. Price per Piece:
- Rp 20.251.213 ÷ 100 = Rp 202.512/piece
💡 5 Tips Menghemat Biaya Fabrikasi 10-30%
Tip #1: Design for Manufacturing (DFM)
Before: Complex contour with 12 sharp corners
After: Simplified design with 8 rounded corners
Savings: -18% laser cutting time, -12% material waste
Tip #2: Batch Production
Before: Order 50 now, 50 later
After: Order 100 sekali
Savings: -15% setup time, -10% material (better nesting)
Tip #3: Material Optimization
Before: Stainless 316 untuk indoor application
After: Stainless 304 (harga 25% lebih murah)
Savings: -25% material cost, same performance
Tip #4: Standardize Thickness
Before: 3mm untuk some parts, 4mm untuk others
After: All 3.5mm (one material order)
Savings: -8% material waste, -12% processing time
Tip #5: Provide Complete Data
Before: PDF drawing only
After: CAD + DXF + material spec + finish requirement
Savings: -30% engineering time, -15% error rate
📞 FREE QUOTE CALCULATOR: Estimasi dalam 4 Jam
Kami mengerti budgeting complexity. Itu sebabnya kami sediakan FREE Project Calculator untuk estimasi cepat:
What You Get:
- Line-item Quotation — bukan harga bundled
- 3 Material Options — mild, stainless, aluminium comparison
- Cost Breakdown — jelas mana material, processing, finishing
- DFM Suggestions — cara hemat 10-25%
- Lead Time Estimate — dari drawing ke delivery
How It Works:
- Kirim drawing (CAD/DXF/PDF) ke 0811 3195 800
- Spesifikasi: Material, quantity, finish requirement
- Dalam 4 jam kerja: Terima detailed quote + optimization suggestions
- Konsultasi gratis jika butuh clarification
Sample Quote Format:
PROJECT: Industrial Bracket (100pcs)
=======================
MATERIAL (Mild Steel 5mm):
- Weight: 235.5 kg × Rp 14.500 = Rp 3.414.750
LASER CUTTING:
- Length: 180m × Rp 9.000 = Rp 1.620.000
BENDING CNC:
- Setup: Rp 225.000
- Bending: Rp 1.250.000
WELDING & FINISH:
- Welding 60m: Rp 3.900.000
- Deburring: Rp 6.300.000
QUALITY CONTROL: Rp 900.000
SUBTOTAL: Rp 17.609.750
PROFIT (15%): Rp 2.641.463
TOTAL: Rp 20.251.213
=======================
PRICE PER PIECE: Rp 202.512
LEAD TIME: 10-12 hari kerja
❓ FAQ: Pertanyaan Umum Biaya Fabrikasi
Q: Kenapa harga berbeda antar supplier?
A: Perbedaan biasanya di: (1) Material quality, (2) Machine capability (precision), (3) Hidden costs (setup, tooling, QC), (4) Profit margin strategy.
Q: Minimum order quantity (MOQ) berapa?
A: Tidak ada MOQ khusus. Tapi untuk 1-2 pieces, setup cost proportion lebih besar (~30% total). Untuk efisiensi, recommend minimal 10 pieces.
Q: Apa saja terms of payment?
A: Standard: 50% advance, 50% sebelum delivery. Untuk project besar (>Rp 50 juta): 30% advance, 40% progress, 30% delivery.
Q: Bagaimana jika ada design change setelah mulai produksi?
A: Change sebelum material cutting: Minimal charge. Change setelah cutting: Charge material + reprocessing. Selalu confirm final design sebelum start.
Q: Apakah include delivery?
A: Ex-works price. Delivery charge based on location (Sidoarjo: gratis, Surabaya: Rp 100.000-250.000, Jatim lainnya: nego).
Q: Garansi berapa lama?
A: Material defect: 3 bulan. Workmanship: 6 bulan. Untuk produk dengan certification: sesuai standar certification.
🏭 Kenapa Memilih MK Metalindo untuk Project Fabrikasi?
Transparency Principle:
"Kami percaya client yang informed adalah client yang satisfied. Makanya setiap quote kami breakdown detail—Anda tau persis bayar untuk apa."
3 Value Propositions:
1. No Hidden Cost Policy
- Semua charges disebutkan di quote awal
- Tidak ada "additional" di invoice akhir
- Jika ada perubahan, approval dulu sebelum proceed
2. Technical Partnership
- Bukan cuma eksekutor, tapi partner teknis
- DFM suggestions gratis (rata-rata hemat 15%)
- Material optimization advice
3. Sidoarjo-Based Production
- Workshop lengkap: laser cutting, bending, welding, finishing
- Quality control in-house
- Lead time lebih pendek (tidak outsourced)
- Lokal support & after-sales
📱 Dapatkan Quote Project Anda Sekarang
Jangan biarkan ketidakpastian biaya menghambat project fabrikasi. Dapatkan transparansi dan kepastian dengan quote detail dari MK Metalindo.
Kirim drawing ke: 📞 0811 3195 800 (WhatsApp)
Atau email ke: [Your Email Here]
Subject: Quote Request - [Project Name]
Include:
- Drawing file (CAD/DXF/PDF)
- Material preference (atau konsultasi)
- Quantity requirement
- Target budget (jika ada)
- Deadline requirement
Within 4 hours: Terima detailed quote + optimization suggestions.
"Biaya yang jelas = Project yang lancar. Ketidakpastian biaya = Risk yang tidak perlu."
📍 MK Metalindo Workshop
Jl. Tambak Sawah No.6B, Waru, Sidoarjo
📞 0811 3195 800 • 🌐 mkmetalindo.co.id
Artikel ini didukung oleh MK Metalindo — Partner Transparan untuk Fabrikasi Logam Presisi di Sidoarjo. 100+ project delivered dengan zero hidden cost complaint.