If you’re researching a concrete block machine price in Bangladesh, chances are you’ve already come across two of the most popular models on the market: the STL-QT3-20 and the STL-QT4-15. Both are automatic, hydraulic-vibration block making machines built for hollow blocks, solid bricks, and pavers – but they’re designed for different scales of production.
Choosing between them isn’t about which one is “better.” It’s about which one matches your daily output target, your labour setup, and your budget. Here’s a straight comparison to help you decide.
Quick Overview
The STL-QT3-20 is a mid-capacity automatic block machine with a 20-second forming cycle, built for businesses that need solid, reliable daily output without jumping into a large-scale industrial setup.
The STL-QT4-15 is the higher-capacity option, with a faster 15-second forming cycle and a significantly larger output ceiling, making it suited to operations planning to scale or already supplying larger contracts.
Side-by-Side Specifications
| Specification | STL-QT3-20 | STL-QT4-15 |
| Forming/Shaping Time | 20 seconds | 15 seconds |
| Shaping Method | Vibration + Hydraulic | Vibration + Hydraulic |
| Daily Capacity (with logo) | 9,600 – 11,520 pcs/day | 20,000 – 25,000 pcs/day |
| Total Rated Power | 34.25 KW | 52 KW |
| Power Voltage | 380V AC | 380V AC |
| Hydraulic Pressure | 16 MPa (adjustable) | 16 MPa (adjustable) |
| Pallet Size | 680 x 530 mm | 880x580mm or 850x550mm |
| Plate Quantity Required | 700–800 pcs | 800–1,000 pcs |
| Machine Weight | 3,200 Kg (line total: 5,500 kg) | 4,200 Kg (line total: 11.5 Ton) |
| Overall Dimensions (L×W×H) | 2300×4000×4200 mm | 1800×2500×3700 mm |
| Labour Required | 8–10 people | 8–10 people |
| Water Consumption | 3–5 T/day | 3–5 T/day |
Production Capacity Breakdown
Output varies depending on what you’re producing. Here’s how each machine performs across common block and brick types:
STL-QT3-20
- Hollow Block (390x100x190mm): 4,800 – 5,760 pcs/day
- Solid Brick with logo (240x115x75mm): 9,600 – 11,520 pcs/day
- Solid Brick without logo: 14,400 – 17,280 pcs/day
- Paver (225×112.5×60mm): 9,000 – 10,000 pcs/day
STL-QT4-15
- Hollow Block (390x100x190mm): 11,000 – 13,000 pcs/day
- Solid Brick with logo (240x115x75mm): 20,000 – 25,000 pcs/day
- Solid Brick without logo: 30,000 – 35,000 pcs/day
- Paver (225×112.5×60mm): 15,000 – 18,000 pcs/day
The pattern is clear: the QT4-15 roughly doubles the QT3-20’s output across nearly every product type, thanks to its shorter 15-second cycle and larger mould capacity.
Where the STL-QT3-20 Makes Sense
The QT3-20 is the right call if you’re:
- Starting your first block-making business and want a manageable entry point without overcommitting capital
- Serving a regional or local market where 9,000–17,000 pieces a day comfortably covers demand
- Working with a smaller footprint – its compact frame fits more modest factory spaces
- Watching your power bill closely – at 34.25 KW total rated power, it’s noticeably lighter on electricity than the QT4-15
It’s a dependable, lower-risk choice for small to mid-sized contractors, brickfield owners transitioning to mechanized production, or anyone testing the block-making business before scaling up.
Where the STL-QT4-15 Makes Sense
The QT4-15 is built for businesses that are:
- Already supplying multiple sites or large contracts and need volume to match
- Planning for growth — buying capacity ahead of demand instead of upgrading again in a year or two
- Running near-continuous shifts where the faster 15-second cycle directly translates into more revenue per day
- Prepared for higher power draw (52 KW total) and a larger plate inventory (800–1,000 pieces) to keep the line fed
If your business plan includes large infrastructure projects, government tenders, or wholesale brick supply, the QT4-15’s near-double output makes the higher upfront cost and power consumption easy to justify over time.
Cost Considerations Beyond the Machine Price
When comparing the concrete block machine price in Bangladesh for these two models, don’t look at the sticker price alone. Factor in:
- Pallet/plate cost – the QT4-15 needs more plates (800–1,000 vs 700–800), which adds to your initial investment
- Power infrastructure – 52 KW vs 34.25 KW may mean different transformer or generator requirements
- Floor space – check your factory layout against each machine’s footprint
- Labour and training – both machines run with a similar 3–5 person crew, so staffing costs are comparable
There’s no universal winner here – it genuinely depends on your production goals:
- Choose the STL-QT3-20 if you want a reliable, cost-efficient machine for steady, moderate-scale production.
- Choose the STL-QT4-15 if you’re scaling up and need serious daily volume to match growing demand.
Both machines are part of Safeway Technologies Ltd.’s STL automatic block machine range, built with vibration-hydraulic forming, adjustable 16 MPa pressure systems, and full installation, training, and after-sales support included.
Get the Right Machine for Your Business
Still unsure which model fits your production targets? Safeway Tech’s team can walk you through current pricing, available stock, and which configuration suits your block, brick, or paver requirements.
