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Jumbo MK3 MouldSKU: JJJBC
4 Inch Block (Imperial) Jumbo MK3 Mould MK3 Mould
The JJJBC is a heavy-duty interchangeable mould unit designed for the Doubell Jumbo MK3 brick making machine. It produces 4 Inch Block (Imperial) bricks with industrial-grade efficiency and consistency.
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Cavity Block
4 Inch Block
Model: BC
Standard 4 Inch Cavity Block (Imperial size). Closed bottom. Typically used for internal partition walls where load-bearing requirements are lower, or for garden walls.
Dimensions
- L: 440 mm
- W: 110 mm
- H: 220 mm
Family
BC
Compatible Machine

MK3 Range
Doubell Jumbo MK3 Manual "egg-layer" Brick Machine (Mould not included)
Doubell Jumbo MK3 Manual "egg-layer" Brick Machine (Mould not included)
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Est. Volume
0.00854 m³
Est. Mass
17.07 kg
Cost Per Brick (ZAR)
7.28
Cement: ZAR 3.76
Sand: ZAR 2.67
Stone: ZAR 0.73
Labor: ZAR 0.13
Production Forecasting
DIY Hand Mould
DIYBC
500
(1 min cycles @ 100% efficiency)
2
1000
Bricks / Day
Jumbo MK2
JJM + JJBC
500
(1 min cycles @ 100% efficiency)
4
2000
Bricks / Day
Jumbo MK3
JJJM + JJJBC
500
(1 min cycles @ 100% efficiency)
8
4000
Bricks / Day