A laboratory buys a dental lab micromotor for the work that wears a handpiece out: acrylic trimming, metal finishing, model work. Free-running speed tells you little about any of them; what decides the job is the figure the motor can hold once the bur is under load, which is why torque is quoted on every model here beside its rpm.
Those four figures separate the range fastest. The full nine-field table — voltage, frequency, power, speed, torque, weight, dimensions and colour — is further down the page.
Further down this page: what each of the seven sets does differently, the six questions that decide between them, and the spare parts worth ordering with the machine.
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Read the table by column rather than by row. Voltage comes first, because it decides whether a unit can be connected at all in the destination market; torque comes next, because torque rather than maximum speed is what decides the job. The seven sets are not variations of one machine — the control units differ in power, the handpieces differ in torque, and three of the series are compact units built for a bench where space is the constraint rather than output.
| Model | Voltage | Frequency | Power | Speed | Max. torque | Weight | Dimensions (W×D×H) | Colour |
|---|---|---|---|---|---|---|---|---|
| JD5500 | 100–110 V / 220–240 V | 50–60 Hz | 85 W | 0–35,000 rpm | 4.8 N·cm | 1,850 g control unit / 213 g handpiece | 74 × 165 × 192 mm | Grey |
| JD7500 | 100–120 V / 220–240 V | 50–60 Hz | 65 W | 0–35,000 rpm | 4.7 N·cm / 7.0 N·cm | 1,450 g control unit / 213 g handpiece | 135 × 132 × 85 mm | Black |
| JD8500 | 100–120 V / 220–240 V | 50–60 Hz | 65 W | 0–35,000 rpm | not published | 1,250 g | 120 × 280 × 81 mm | Pink and grey |
| 90-102L | 220 V / 50 Hz or 110 V / 60 Hz | 50 / 60 Hz | not published | 0–35,000 rpm | not published | not published | not published | Metal cover |
| 204-102L | 220 V / 50 Hz | 50 Hz | not published | 0–35,000 rpm | not published | not published | not published | Plastic cover |
| 207B-107 | not published | not published | 65 W | 0–40,000 rpm | 300 gf·cm | 1,700 g | 130 × 150 × 84 mm | not published |
| 90-108E | not published | not published | 65 W | 0–35,000 rpm | 280 gf·cm | 1,300 g | 95 × 124 × 68 mm | not published |
How to read this table. “Not published” means the figure is not stated in the specification we hold for that model, and we would rather leave the cell empty than estimate it. Torque is quoted in the unit used for each model — N·cm for the JD series and gf·cm for the 207B and 90-108E — so the two groups cannot be compared by number alone (1 N·cm ≈ 10.2 gf·cm). Ask for the current datasheet of the exact model and we will send it with the test conditions.
Six questions decide which dental lab micromotor suits a bench. They are listed in the order they usually change the answer: the first three eliminate models, the last three decide between what is left.
All seven models reach 35,000 rpm, and the 207B-107 reaches 40,000. Speed is the figure buyers ask about and torque is the one that decides the job: acrylic trimming, metal finishing and model work all slow a motor down, and a handpiece that stalls mid-cut marks the surface. Torque is published as 4.8 N·cm for the JD5500, 4.7 or 7.0 N·cm for the JD7500 depending on configuration, and 300 or 280 gf·cm for the 207B-107 and 90-108E. If your dental lab micromotor is bought for heavy trimming rather than light polishing, say so and we will point at the higher-torque configuration rather than the higher-speed one.
The micromotor is bought as a set — handpiece, control unit and foot pedal — but the handpiece is the part that wears. Confirm the chuck type and the bur or wheel shank it accepts before ordering, and confirm that replacement handpieces are available for the control unit you choose. A bench that already owns handpieces from another system may only need the control unit; a bench starting from nothing needs the set, and the standard accessory list for every model on this page is handpiece, control box and foot pedal.
Laboratory work is not intermittent: a technician may run the same handpiece for an hour on one denture. The JD series is specified for long operation without heat build-up, and the 90 and 204 series use a stable circuit layout to hold vibration down over a long session. Neither claim replaces a duty cycle figure, so if your bench runs eight hours a day, ask for the recommended rest interval rather than assuming the motor is rated for continuous use.
Speed is set by hand dial or by foot pedal on most models, and the choice matters more than it looks: a technician who works two-handed needs the pedal, while a bench used for short touch-up work is fine with the dial. Every model on this page is supplied with a foot pedal as standard, and the JD5500 and 207B-107 also allow hand or foot control of rpm. Check the pedal cable length against the bench layout, since a short cable decides where the control box has to sit.
The JD series and both compact series use carbon brush motors, and the brushes are the part that wears out. Ask for the brush set and the handpiece cable with the machine rather than after the first failure, because a stopped micromotor stops a bench. Wheels, burs and abrasives are ordered separately to match the chuck — the range is listed under dental diamond burs and the laboratory machines that use them under dental lab equipment.
A single-technician laboratory, a clinic doing repairs and a distributor stocking a fast-moving item are three different purchases. One unit per bench is normal in a laboratory; a clinic usually buys one and expects it to cover occasional model work; a distributor buys a range because the models sell to different benches. State how many units are needed, how many hours a day they run, and whether the same bench also polishes metal — that last answer often moves the choice from a compact unit to the JD series.
The seven dental lab micromotor models fall into two physical arrangements, and the difference is bench space rather than performance. Read the two columns against your own bench before comparing prices.
A box that sits on or under the bench, with the handpiece resting in a cradle on the unit. This is the arrangement used by the JD5500, JD7500 and JD8500.
A smaller footprint where the motor and control sit close together. The 90-102L, 204-102L and 90-108E belong here, and the 90-108E is the model intended for clinic use.
Neither arrangement is better in general. A commercial laboratory that runs one dental lab micromotor all day usually prefers the separate control unit because the cable route and the service access are easier; a clinic or a training room buying ten units usually prefers the compact form because bench space is the scarce item. Tell us which applies and the shortlist narrows immediately.
Every dental lab micromotor model on this page is supplied as a set rather than as a bare motor. The standard accessory list is the same across the range: micromotor handpiece, control box and foot pedal. What changes is the handpiece weight and the cover.
The JD5500 and JD7500 dental lab micromotor handpieces weigh 213 g each, which is the figure that matters by the end of a shift: the handpiece is held, the control box is not. A heavier handpiece is not a fault — it usually means more metal around the bearings — but a technician who works six hours a day will notice the difference between models. Ask for the handpiece weight when comparing sets, because some suppliers quote the shipping weight of the whole carton instead.
The JD5500 delays the forward / reverse switch by two seconds, which protects the motor from being reversed under load. The JD series and the 207B-107 both carry automatic overload protection that cuts the motor rather than letting it stall. On a laboratory bench this is the difference between a fuse and a repair: overload protection stops the unit, and the technician restarts it.
A dental lab micromotor is a consumable in slow motion. The motor itself rarely fails first; the parts around it do. These are the items to plan for, and the ones worth buying with the machine.
Every model on this page uses a carbon brush motor, and the brushes wear with running hours rather than with age. Keep a spare brush set per dental lab micromotor in the drawer: a worn brush shows as hesitation under load or a motor that will not hold speed, and replacing it takes minutes. Ask for the brush set matching the exact model, since the JD and the compact series do not share the same part.
The cable takes the flexing that the motor does not, and a break inside the sheath is the most common reason a working control unit appears dead. Test with a second handpiece before ordering a control unit. Cables and connectors are available as spares for the models we list; quote the model number when asking, because the connector differs between the JD series and the compact units.
The pedal is the second wear item: it is stepped on all day, and the switch inside it eventually fails open. A spare pedal is cheap against a lost day of work. If the speed dial becomes erratic before the pedal does, the fault is usually in the control board rather than the dial, and that is a service question rather than a spare part.
A dental lab micromotor is only as good as what it turns. Wheel diameter and bore, bur shank and abrasive grade all have to match the handpiece chuck. The bur range is listed separately under dental diamond burs; the machines the micromotor usually sits beside — trimmers, lathes and polishers — are under dental lab equipment.
Dental lab micromotor orders are quoted on an EXW basis, so freight stays visible and can be arranged by your own forwarder or by one we have shipped with for years. Choosing our forwarder does not change the equipment price.
Before the goods are packed you can ask for a video inspection of the set running; after packing, for photographs of the cartons and of the container being loaded. Buyers who cannot visit Tangshan use these records instead of a factory visit.
Every dental lab micromotor on this page carries a one year warranty. If a unit gives trouble inside that period, send photographs or a video of the fault and we replace it, which is faster and cheaper than returning a motor across an ocean.
Documentation is prepared with the shipment. Tell us at quotation stage what your customs broker requires, because the list differs by country:
A quotation comes back the same day when the enquiry carries the details below. Voltage and destination are the two that change the price rather than the paperwork.
| What to send | Why it changes the answer | Example |
|---|---|---|
| Model or the work it must do | Decides between the JD series and a compact unit | Heavy acrylic trimming, 6 hours a day |
| Quantity per bench | Changes packing and the unit price | 4 units, one per technician |
| Voltage and frequency at the socket | 110 V / 60 Hz and 220 V / 50 Hz are different builds | 220–240 V, 50 Hz |
| Destination country and port | Freight, documents and plug type follow the destination | Felixstowe, United Kingdom |
| Handpieces already owned | A bench with handpieces may need the control unit only | Two spare handpieces in stock |
| Documents required at import | Certificate of Free Sale and registration are issued per order | CE documentation plus Free Sale |
If your list already exists as a spreadsheet, send it as it is — we will return the same rows with prices, pack sizes and the certificate status of each model filled in.
Power, weight and control layout. The JD5500 is the 85 W unit with a 4.8 N·cm handpiece; the JD7500 is 65 W with a choice of 4.7 or 7.0 N·cm and a handpiece cradle mounted inside the controller; the JD8500 is 65 W and the lightest of the three at 1,250 g, in a pink and grey case. If the bench does heavy trimming, start from the JD5500 or the 7.0 N·cm JD7500 configuration rather than from the lightest unit.
No. A dental lab micromotor is built for bench work — trimming, grinding and polishing prosthetics — and is supplied with a control unit and foot pedal that sit on a laboratory bench. A dental chair motor is part of the treatment unit and is matched to that unit's controls. The 90-108E on this page is the model specified for clinic use, and it is still a bench-style set rather than a dental micromotor built into a chair.
Often, but the connector has to match the series on the dental lab micromotor you are buying. Send a photograph of the handpiece connector and the model number of the control unit and we will confirm before you order. Buying a control unit alone is normal for a bench that already holds spare handpieces; the connector is the part that decides compatibility, not the brand name.
The one at your socket. The JD series is built for 100–110 V or 220–240 V with a 50 or 60 Hz supply; the 90-102L is offered in 220 V / 50 Hz with a European plug or 110 V / 60 Hz with an American plug; the 204-102L is 220 V / 50 Hz. State the voltage and the plug type in the enquiry — a 110 V unit cannot be corrected on arrival without a transformer.
All models except the 207B-107 reach 35,000 rpm; the 207B-107 reaches 40,000 rpm. Maximum speed matters less than torque for laboratory work: acrylic and metal both slow a motor down, and a unit that holds speed under load finishes the surface evenly. Ask for both figures, and for the speed at which the quoted torque is delivered.
We do not publish a service life figure, because it depends on running hours and on how often the brushes are changed. What we can say is that the brushes and the handpiece cable are the parts that wear, that both are available as spares, and that the units carry a one year warranty. A bench that keeps a spare brush set and a spare pedal gets several years of service from a dental lab micromotor.
OEM and ODM requests are accepted and customisation is available. The scope differs by model: branding on the unit or the carton, packaging changes, voltage configuration, or a set packed for a specific bench. Send the requirement and we confirm what is possible for the model you have chosen before the order is placed.
There is no single figure for the range. MOQ depends on the model, on whether the order is standard or customised, and on the packing used. Send the dental lab micromotor model list and we confirm the minimum for each item rather than quoting one number that would not hold for half of them.
Send the model or the work the bench has to do, the quantity, the voltage at the socket and the destination port. We reply with prices, pack sizes and the certificate status for each dental lab micromotor in the list.
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