Most buyers open the conversation with suction. Thickness decides whether the robot can reach the work at all, and it quietly drives return rates for a distributor.
Our manufacturing base is in Chongqing. For years our product went mainly to domestic customers. This year we decided to sell window cleaning robots globally and to publish the process openly. The J10 body measures 220 x 220 x 60 mm at the thickest point of the shell, at 1.4 kg net weight. That is the claim in one line, and the rest of this article is what it means once the unit is hanging on a window.
The clearance problem is a commercial problem
A window cleaning robot is not a vacuum cleaner. It has to sit on glass, seal against glass and move across it, and every one of those steps depends on how the glass is framed.
A body too tall for the frame channel does not clean badly. It refuses to work. The unit rests on the frame lip instead of sitting fully on the pane, the drive wheels lose glass contact, the edge sensor stops reading the frame line accurately, and the suction cup fights for a seal it was not designed to hold. To a distributor, that is a returned unit with a full explanation attached.
The J10 manual is specific about supported conditions. Frameless glass is suitable. Framed glass needs a frame height greater than 3 mm. Minimum glass thickness is 3 mm. The working area runs from a 40 x 40 cm pane up to 3 x 4 m.
How 60 mm compares
| Brand | Model | Body thickness |
|---|---|---|
| JIAJINGCAT | J10 | 60 mm |
| Dreame | C1 | approx. 70 mm |
| HOBOT | SP10 | 75 mm |
| Ecovacs | WINBOT W2S PRO | 77.5 mm |
| HUTT | W10 | 83 mm |
Each figure comes from that brand's own published material, listed at the end of this article so a buyer can open the pages and check us.
Read the table as a clearance hierarchy rather than a race. The HUTT W10 is the thickest body here, and 83 mm against our 60 mm is the difference between lifting a machine over a wide channel and lowering it into a narrow aluminium one. It is a statement about which frames each body can enter, not a judgement on any manufacturer's engineering.
We also kept the 220 x 220 mm footprint alongside the 60 mm height. A thin body that needs a wide base is not thin in any sense the operator feels, and this way the unit stays square and stable on a vertical pane.
From the factory floor: putting a real frame in front of the machine
Sampling is not a formality on our Chongqing line. For every new account we ask for photographs and section drawings of the frames the customer actually cleans, and we keep a rack of offcuts: black anodised aluminium channels, white uPVC sections, and frameless glass with a silicone joint.
From those offcuts our engineers build a mock-up on the test rig, a full-size glass panel with a real frame section bonded along one edge, then run the J10 along the channel and watch three things. Does the 60 mm body enter the channel, or does the shoulder of the shell sit up on the frame lip? Do both drive wheels stay completely on glass? Does the edge sensor trip at the frame line before the unit crosses it?
The acceptance rule is physical. The squeegee edge must stay on glass for the whole pass, and the frame must not touch the wheels. A unit that fails the first check never reaches the third, because a robot climbing on a frame edge is already outside the design.
This is where the weight figure matters too. At 1.4 kg net, one operator can lift the J10 to a high transom without a second pair of hands and set it down square on the glass. On a frameless installation with no sill to rest on, that placement is where a lot of jobs go wrong.
Where thinness stops helping
Thinness is an access feature, not a grip feature. Holding on to glass at height is the job of the 8000 Pa peak suction, and staying attached when the power cuts is the job of the 35-minute backup supply. A 60 mm body in a gusty street gets blown, regardless of how slim it is.
Frames also have limits of their own. An inward-opening sash, a rubber gasket lip or a deep structural mullion can still defeat a slim body. When a customer sends a section drawing and the answer is that the unit will not fit, we say so before the purchase order.
What to ask any supplier before you commit
If you are buying 500 units, ask these in writing and get written answers:
- What is the maximum body height including the squeegee assembly and the fitted cloth, not just the bare shell?
- What frame height do you support, and is that figure on the official product page or buried in a PDF?
- What is the minimum glass thickness, and does it change for tempered or coated glass?
- Which suction figure are you quoting, and is it a peak value or a sustained value?
- How long does the unit hold its grip after the power is cut, and is that tested at full charge?
We answer the last three from the manual and publish them: 8000 Pa peak suction, 35 minutes of backup power, 1.4 kg net weight. We sell wholesale, OEM, ODM and through distributors only, with no direct-to-consumer retail channel. A trial order starts at 50 units, ODM projects from 500 units, samples ready in 7 days, production 15 days from an approved sample, FOB Chongqing. On equivalent specification we sit 15% to 25% below the tier-one brands.
Sources
- JIAJINGCAT AutoWipeBot J10 Product Manual (English edition), factory model ZF10 — https://autowipebot.com
- ECOVACS WINBOT product pages — https://www.ecovacs.com/uk/campaign/ces-robot-window-cleaner-winbot
- HOBOT SP10 product page — https://www.hobot.com.tw/category/product/hobot/
- HUTT official site and product documentation — https://www.huttwisdom.com
- Dreame C1 product page — https://global.dreametech.com/products/dreame-c1
What we can prove, and what we can't
We can prove the published specification of the J10: 60 mm body thickness in a 220 x 220 x 60 mm envelope, 8000 Pa peak suction, a 35-minute backup supply, 1.4 kg net weight, a 100 ml tank with bidirectional six-nozzle ultrasonic atomisation and no water pump, five cleaning modes, Tuya Bluetooth app control with 2.4G remote redundancy, 24V DC 3A rated input at 72 W with a 100-240V 50/60Hz adapter, a 5 m safety rope rated to 130 kg, and the full packing list. Every one of those numbers has a source you can open.
We are currently preparing export platforms for CE, UKCA and FCC, with IDs issued when released. We hold no certificate to quote today.
What we cannot prove is that the J10 will fit a particular window profile without seeing that profile, or that a given facade is safe to work on. Clearance depends on the frame in front of the unit. Working at height depends on the anchor point, the rope and the rules your crew follows. Send us the frame sections and we will tell you plainly whether the machine goes in.