# LEGO 42112-1 — Cement Mixer (2020)

Source: https://www.brickmissing.com/sets/42112-1-cement-mixer
Publisher: BrickMissing (https://www.brickmissing.com) — free LEGO parts checker. Not affiliated with the LEGO Group.

The LEGO Technic Cement Mixer (42112-1), with its 1161 pieces, meticulously recreates a vital construction vehicle. This detailed model features 8 robust wheels and an opening driver’s cab, providing access to the internal mechanisms. A prominent large mixing drum simulates real-world operation; it rotates automatically as the truck is pushed or can be turned manually via a separate gear. For unloading, turning the drum counterclockwise dispenses the 'concrete' — represented by 100 1x1 LEGO bricks. An articulated funnel system, controlled by a dedicated handle, guides the 'concrete' into position, while a moving motor detail adds to the model's authentic feel and complex Technic functionality. This replica stands as a functional display piece showcasing engineering principles.

## Set facts

- Set number: 42112-1
- Name: Cement Mixer
- Theme: Technic
- Released: 2020
- Pieces: 1161
- Distinct part + colour lots: 128
- Build difficulty: intermediate
- Repairability: 3.1% of this set's lots are hard to replace (4 of 128 part+colour combinations appear in three or fewer sets in the entire LEGO catalog).

## Complete parts list (128 lots, 1161 pieces)

Prices are the official LEGO Pick a Brick price per individual part, where LEGO publishes one.

| Qty | Part | Colour | Part no. | LEGO element ID | LEGO price each |
| ---: | --- | --- | --- | --- | --- |
| 2 | Technic Pin Connector Hub with 2 Perpendicular Axles | Orange | 10197 | 6259825 | — |
| 19 | Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle | Red | 11214 | 6209519 | €0,29 |
| 3 | Technic Panel Fairing #21 5L Small Smooth, Side B | Light Bluish Gray | 11946 | 6524693 | €0,38 |
| 2 | Technic Panel Fairing #21 5L Small Smooth, Side B | Dark Blue | 11946 | 6352645 | €0,38 |
| 2 | Technic Panel Fairing #22 5L Small Smooth, Side A | Dark Blue | 11947 | 6352664 | €0,38 |
| 3 | Technic Panel Fairing #22 5L Small Smooth, Side A | Light Bluish Gray | 11947 | 6524692 | €0,38 |
| 2 | Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] | Light Bluish Gray | 14720 | 6055519 | €0,36 |
| 8 | Tyre 49.53 x 20 | Black | 15413 | 6055626 | €2,71 |
| 1 | Technic Axle 5 with Stop | Reddish Brown | 15462 | 6159763 | €0,11 |
| 3 | Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] | Tan | 18575 | 6346517 | €0,36 |
| 16 | Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle | Black | 18651 | 6089119 | €0,08 |
| 100 | Technic Pin Connector Round 1L [Beam] | Dark Bluish Gray | 18654 | 6100030 | €0,05 |
| 27 | Technic Pin Connector Round 1L [Beam] | White | 18654 | 6177114 | €0,05 |
| 1 | Technic Turntable Large Type 3 Top, 60 Tooth | Black | 18938 | 6109283 | — |
| 1 | Technic Turntable Large Type 3 Base | Light Bluish Gray | 18939 | 6109285 | €1,04 |
| 2 | Technic Gear 16 Tooth with Clutch on Both Sides | Red | 18946 | 6100930 | €0,42 |
| 1 | Technic Driving Ring 3L | Dark Bluish Gray | 18947 | 6100931 | €0,47 |
| 1 | Technic Driving Ring Connector | White | 18948 | 6276052 | €0,23 |
| 6 | Technic Pin Connector Hub with 1 Axle | Light Bluish Gray | 22961 | 6123815 | €0,13 |
| 1 | Technic Axle 11 | Yellow | 23948 | 6130012 | €0,29 |
| 2 | Technic Panel Curved and Bent 6 x 3 | Dark Blue | 24116 | 6174849 | — |
| 2 | Technic Panel Curved and Bent 6 x 3 | Light Bluish Gray | 24116 | 6268004 | €0,71 |
| 4 | Technic Panel Curved 7 x 3 with 2 Pin Holes through Panel Surface | White | 24119 | 6246996 | €0,63 |
| 1 | Tile 1 x 4 with Groove | Light Bluish Gray | 2431 | 4211356 | €0,12 |
| 10 | Technic Axle 3 with Stop | Reddish Brown | 24316 | 6135494 | €0,07 |
| 4 | Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end | Light Bluish Gray | 25214 | 6151349 | €0,23 |
| 161 | Technic Pin with Friction Ridges Lengthwise and Center Slots | Black | 2780 | 278026 | — |
| 6 | Technic Pin Connector Hub with 2 Axles | Dark Bluish Gray | 27940 | 6167281 | €0,17 |
| 1 | Technic Steering Wheel Small (3 Studs Diameter) | Light Bluish Gray | 2819 | 4580510 | €0,34 |
| 1 | Technic Axle and Pin Connector Angled #1 | White | 32013 | 6332573 | €0,08 |
| 6 | Technic Axle and Pin Connector Angled #1 | Black | 32013 | 6284699 | €0,08 |
| 2 | Technic Axle and Pin Connector Angled #5 - 112.5° | Light Bluish Gray | 32015 | 6271347 | €0,21 |
| 2 | Technic Axle and Pin Connector Angled #3 - 157.5? | Light Bluish Gray | 32016 | 6261387 | €0,13 |
| 11 | Technic Axle and Pin Connector Angled #2 - 180° | Black | 32034 | 6271869 | €0,11 |
| 1 | Technic Axle Connector with Axle Hole | Black | 32039 | 3203926 | — |
| 23 | Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] | Orange | 32054 | 4140428 | — |
| 12 | Technic Axle 2 Notched | Red | 32062 | 4142865 | €0,07 |
| 4 | Technic Beam 1 x 6 Thin | Light Bluish Gray | 32063 | 6170293 | €0,13 |
| 2 | Technic Beam 1 x 7 Thin | Black | 32065 | 6271573 | €0,28 |
| 16 | Technic Axle 5 | Light Bluish Gray | 32073 | 4211639 | €0,11 |
| 4 | Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced | Yellow | 32123b | 6271167 | €0,04 |
| 2 | Technic Axle and Pin Connector Toggle Joint Smooth | Black | 32126 | 6457112 | €0,25 |
| 2 | Technic Beam 2 x 4 L-Shape Thick | Dark Blue | 32140 | 6271839 | €0,15 |
| 6 | Technic Beam 2 x 4 L-Shape Thick | Black | 32140 | 6271829 | €0,15 |
| 10 | Technic Beam 2 x 4 L-Shape Thick | Light Bluish Gray | 32140 | 6271831 | €0,15 |
| 16 | Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole | Yellow | 32184 | 6276974 | €0,12 |
| 1 | Technic Axle and Pin Connector Angled #4 - 135° | Red | 32192 | 6262898 | €0,19 |
| 1 | Axle Hose, Soft 11L | Black | 32199 | 4234438 | €0,88 |
| 4 | Technic Beam 3 x 3 L-Shape with Quarter Ellipse Thin | Black | 32249 | 3224923 | — |
| 4 | Technic Beam 3 x 3 L-Shape with Quarter Ellipse Thin | White | 32249 | 3224901 | — |
| 6 | Technic Gear 12 Tooth Double Bevel | Black | 32270 | 4177431 | €0,18 |
| 2 | Technic Beam 1 x 9 Bent (7 - 3) Thick | Black | 32271 | 6276835 | €0,33 |
| 3 | Technic Beam 1 x 15 Thick | Black | 32278 | 4542573 | €0,42 |
| 4 | Technic Axle and Pin Connector Perpendicular Double | Black | 32291 | 6280394 | €0,15 |
| 4 | Technic Beam 1 x 5 Thick | Dark Blue | 32316 | 6420960 | €0,19 |
| 20 | Technic Beam 1 x 5 Thick | Light Bluish Gray | 32316 | 4211651 | €0,19 |
| 6 | Technic Beam 1 x 7 Bent (4 - 4) Thick | Black | 32348 | 4144300 | — |
| 2 | Technic Beam 1 x 7 Bent (4 - 4) Thick | Light Bluish Gray | 32348 | 6278129 | €0,27 |
| 1 | Technic Gear 36 Tooth Double Bevel | Black | 32498 | 4255563 | €0,90 |
| 13 | Technic Beam 1 x 3 Thick | Light Bluish Gray | 32523 | 4211655 | €0,10 |
| 2 | Technic Beam 1 x 3 Thick | Dark Blue | 32523 | 6434419 | €0,10 |
| 14 | Technic Beam 1 x 3 Thick | Black | 32523 | 4509376 | €0,10 |
| 7 | Technic Beam 1 x 7 Thick | Light Bluish Gray | 32524 | 4495930 | €0,25 |
| 10 | Technic Beam 1 x 7 Thick | White | 32524 | 4495927 | €0,25 |
| 10 | Technic Beam 1 x 11 Thick | Black | 32525 | 6029578 | €0,33 |
| 8 | Technic Beam 3 x 5 L-Shape Thick | Dark Blue | 32526 | 6217683 | €0,24 |
| 12 | Technic Beam 3 x 5 L-Shape Thick | Light Bluish Gray | 32526 | 4211713 | €0,24 |
| 4 | Technic Pin Long without Friction Ridges | Tan | 32556 | — | — |
| 1 | Technic Gear 20 Tooth Double Bevel with Clutch on Both Sides | Black | 35185 | 6224999 | €0,41 |
| 1 | Technic Gear 24 Tooth [New Style with Single Axle Hole] | Dark Bluish Gray | 3648b | 6133119 | €0,33 |
| 2 | Technic Pin without Friction Ridges Lengthwise | Light Bluish Gray | 3673 | 4211807 | €0,05 |
| 7 | Technic Axle 4 | Black | 3705 | 370526 | €0,08 |
| 1 | Technic Axle 6 | Red | 3706 | 6130002 | €0,12 |
| 18 | Technic Bush | Light Bluish Gray | 3713 | 6275844 | €0,05 |
| 2 | Technic Axle Pin without Friction Ridges Lengthwise | Tan | 3749 | 4666579 | €0,06 |
| 6 | Technic Connector Beam 3 x 3 | White | 39793 | 6247424 | €0,38 |
| 2 | Technic Beam 1 x 9 Thick | Black | 40490 | 6115617 | €0,29 |
| 2 | Technic Beam 1 x 9 Thick | White | 40490 | 6001831 | €0,29 |
| 8 | Technic Beam 1 x 9 Thick | Light Bluish Gray | 40490 | 6102449 | €0,29 |
| 6 | Technic Beam 1 x 13 Thick | Light Bluish Gray | 41239 | 4522934 | €0,39 |
| 3 | Technic Beam 1 x 13 Thick | Black | 41239 | 6302337 | €0,39 |
| 28 | Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes | Light Bluish Gray | 42003 | 6273724 | €0,12 |
| 8 | Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls] | Light Bluish Gray | 42195 | 6273212 | €0,13 |
| 1 | Technic Panel Car Mudguard Arched 9 x 2 x 3 | White | 42531 | 6254784 | €0,69 |
| 4 | Wheel 11 x 8 with Center Groove | Light Bluish Gray | 42610 | 4211758 | €0,11 |
| 26 | Technic Pin 1/2 | Light Bluish Gray | 4274 | 4211483 | €0,05 |
| 46 | Technic Axle Pin with Friction Ridges Lengthwise | Black | 43093 | 4206482 | €0,06 |
| 2 | Technic Axle 7 | Yellow | 44294 | 6130009 | €0,16 |
| 9 | Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Small Squared Pin Holes] | Red | 44874 | 6323573 | €0,18 |
| 31 | Technic Axle 3 | Yellow | 4519 | 6130007 | €0,05 |
| 1 | Clutch Outer Side with Axle Connector | White | 46834 | 6257336 | €0,69 |
| 1 | Clutch Inner Side with Axle Connector | Dark Bluish Gray | 46835 | 6257337 | €0,59 |
| 4 | Tyre 14 x 6 Solid Smooth | Black | 50951 | 4246901 | €0,18 |
| 1 | Technic Changeover Catch - New Style | Red | 51149 | 6313493 | €0,36 |
| 4 | Technic Axle 8 with Stop | Dark Bluish Gray | 55013 | 4499858 | €0,21 |
| 8 | Wheel 30.4 x 20 without Pinholes, with Reinforced Rim | Light Bluish Gray | 56145 | 4297210 | €0,50 |
| 2 | Technic Axle Connector Hub with 3 Axles at 120° | Light Bluish Gray | 57585 | 4502595 | €0,28 |
| 13 | Technic Axle Connector Smooth [with x Hole + Orientation] | Red | 59443 | 4513174 | €0,06 |
| 5 | Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole | Dark Blue | 60483 | 6344867 | €0,07 |
| 14 | Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole | Orange | 60483 | 6265128 | €0,07 |
| 5 | Technic Beam 3 x 3 T-Shape Thick | Black | 60484 | 4552347 | €0,18 |
| 2 | Technic Axle 9 | Light Bluish Gray | 60485 | 4535768 | €0,21 |
| 1 | Technic Beam 3 x 0.5 Liftarm with Boss and Blocked, Squared Pin Hole | Red | 61408 | 6331864 | €0,25 |
| 6 | Plate Round 1 x 1 with Solid Stud | Trans-Clear | 6141 | 6514052 | €0,04 |
| 1 | Technic Universal Joint 3L [Complete Assembly] | Light Bluish Gray | 61903 | 6335279 | €0,74 |
| 2 | Technic Gear Differential with Inner Tabs and Closed Center, 28 Bevel Teeth [Sharp Edge] | Dark Bluish Gray | 62821c | — | — |
| 1 | Technic Axle and Pin Connector Perpendicular Triple | Black | 63869 | 6362991 | €0,17 |
| 4 | Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick | Light Bluish Gray | 64179 | 4539880 | €0,91 |
| 2 | Technic Panel 5 x 11 x 1 | Dark Blue | 64782 | 6059012 | — |
| 2 | Technic Pin Double with Axle Hole - Squared Holes | Light Bluish Gray | 65098 | 6315900 | €0,28 |
| 4 | Technic Axle and Pin Connector Perpendicular | Black | 6536 | 6261383 | €0,10 |
| 34 | Technic Axle and Pin Connector Perpendicular | Black | 6536 | 6261371 | €0,10 |
| 2 | Concrete Mixer Half Shell with Orange Arrow, White Circle print | Dark Blue | 65421pr0001 | 6302622 | — |
| 11 | Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Square Holes] | Black | 65487 | 6282140 | €0,11 |
| 13 | Technic Pin Connector Hub Perpendicular 3L with 4 Pins (Squared Holes) | Light Bluish Gray | 65489 | 6282158 | €0,22 |
| 111 | Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots | Black | 6558 | 4514553 | — |
| 8 | Technic Gear 12 Tooth Bevel | Tan | 6589 | 4565452 | €0,10 |
| 2 | Technic Beam 1 x 9 Bent (6 - 4) Thick | Light Bluish Gray | 6629 | 6279885 | €0,34 |
| 6 | Technic Beam 1 x 9 Bent (6 - 4) Thick | Black | 6629 | 6279882 | €0,34 |
| 1 | Sticker Sheet for Set 42112-1 | Unknown | 68301 | 6303284 | — |
| 4 | Technic Axle 4 with Stop | Dark Bluish Gray | 87083 | 6083620 | €0,07 |
| 2 | Technic Pin Connector Toggle Joint Smooth Double with Axle and Pin Holes | Black | 87408 | 6278412 | €0,47 |
| 2 | Technic Gear Rack 1 x 7 with Axle and Pin Holes | Black | 87761 | 6327430 | €0,82 |
| 4 | Technic Axle and Pin Connector Perpendicular Split | Light Bluish Gray | 92907 | 6279023 | €0,29 |
| 4 | Technic Gear 16 Tooth Reinforced [New Style] | Light Bluish Gray | 94925 | 4640536 | €0,21 |
| 6 | Tile Round 1 x 1 | Trans-Orange | 98138 | 6514197 | €0,05 |
| 2 | Tile Round 1 x 1 | Trans-Red | 98138 | 6258607 | €0,05 |
| 2 | Technic Axle 4 with Centre Stop | Tan | 99008 | 4666999 | €0,10 |

## Notes

- Track which of these parts you own and see what is missing: https://www.brickmissing.com/sets/42112-1-cement-mixer
- Inventory data is based on official LEGO inventories via the Rebrickable catalog, updated daily.
- Part images, minifigure lists and related sets are on the set page: https://www.brickmissing.com/sets/42112-1-cement-mixer