Danfoss OMR 200: where it fits in the range and how to size it
Choosing a Danfoss OMR 200 over the OMR 160 is mostly a question about your pump. The two can carry the same continuous torque. What separates them is how much oil you can supply and how much pressure your relief valve allows. Get it wrong and you either starve the motor or run it harder than it needs. Advance Hydraulic Works handles hydraulic pump and motor repair and supply from Delhi NCR, and this is how we’d go through the decision with you.
Danfoss OMR 200 motor: the real ratings
Listings for the common 25 mm shaft version, part number 151-0715, give a displacement of 199.8 cm³ per revolution. Continuous speed is 300 rpm and intermittent is 375 rpm. Continuous torque is 300 N·m, with 390 N·m intermittent. Pressure drop is 110 bar continuous and 140 bar intermittent. Continuous flow is 60 litres per minute.
Other versions differ. A 32 mm shaft listing, part number 151-1166, gives 450 N·m and 175 bar continuous, with 200 bar intermittent and 225 bar peak. Other sellers list 369 or 385 N·m at 140 bar. The 25 mm shaft motors run to the lower figures. Read the datasheet for your exact part number and don’t borrow numbers from a neighbouring variant.
Danfoss OMR 200 hydraulic motor: how it differs from the OMR 160
Put the two side by side. In the maker’s table the continuous speed is about 375 rpm for the 160 and 300 rpm for the 200. The typical 160 rating is 300 N·m at around 130 bar. The 25 mm Danfoss OMR 200 hits the same 300 N·m at 110 bar.
So moving up a size doesn’t buy you more continuous torque. It buys the same torque at lower pressure and lower speed. That helps if your relief valve is set low or you want gentler duty on the seals. It’s a waste if you need speed, because the 200 simply turns slower for the same flow.
Who makes the Danfoss OMR 200 now?
One European reseller says the Danfoss OMR 200 is no longer in production. It lists 151-0715 as replaced by the OMR X 200, part number 11186665, made by White Drive Motors & Steering, the former Danfoss and Sauer-Danfoss business. The seller describes the OMR X as a newer generation with an improved shaft seal and up to 15% more torque than the old design.
The old and new motors can share mounting dimensions and still differ inside. Check the datasheet for the exact model you’re being offered.
What the Danfoss OMR 200 costs
These are overseas listings. None is an Advance Hydraulic Works price:
- An OMR X 200 with 25 mm shaft, 151-0715 cross-reference, at $229.00.
- An aftermarket OMR 200, part number 151-0405, at $324.31, listed as low stock.
- Another aftermarket OMR 200, part number 151-7245, at $388.76.
Maker, version and warranty explain most of the spread. Size doesn’t.
The method: duty, flow, pressure, version
- Duty. Write down the torque, speed and pressure your machine needs continuously.
- Flow. Check how much oil your pump gives at that pressure.
- Pressure. Check your relief valve setting.
- Version. Confirm part number, shaft and drain port from the nameplate.
A worked example
Say a drive needs 300 N·m continuously at about 290 rpm. The Danfoss OMR 200 needs 199.8 × 290 ÷ 1,000, about 58 litres per minute, at roughly 110 bar. An OMR 160 would need about 46 litres per minute, but around 130 bar.
Now look at your pump. If it gives 60 litres per minute and your relief valve sits at 125 bar, the 200 fits and the 160 doesn’t, because the 160 needs more pressure than your system allows. If the pump gives 50 litres per minute and the relief is at 175 bar, the 160 is the better fit. The 200 would only reach about 50,000 ÷ 199.8, roughly 250 rpm, which is slower than you want.
The right size depends on the pump, not on the bigger number. This is illustrative arithmetic, so use the current datasheet figures for your actual motor.
Implementation steps
- Photograph the old motor’s nameplate, shaft and flange before removal.
- Write down the full part number, such as 151-0715, and note whether it has a drain port.
- Work out the continuous torque, speed and pressure your machine needs.
- Check your pump’s flow and your relief valve setting.
- Send everything to Advance Hydraulic Works and ask what’s available.
- Ask the seller to state the maker, part number, condition and warranty in writing.
- Compare the new motor’s plate and shaft with the old one before fitting.
- Flush the lines, fit the motor, and run it unloaded first while you watch temperature and noise.
The usual mistakes are upsizing for torque you already have, ignoring the pump’s flow, and running above the continuous ratings.
FAQs
What is the Danfoss OMR 200?
An orbital motor with 199.8 cm³ displacement. The common 25 mm shaft version is rated at 300 rpm, 300 N·m and 110 bar continuous.
What is a Danfoss OMR 200 motor used for?
Low-speed, high-torque drives where a gearbox would add cost and size, such as conveyors, augers, sweepers and small wheel drives.
Is the Danfoss OMR 200 hydraulic motor better than the OMR 160?
Not for continuous torque, since both give about 300 N·m. The 200 delivers it at lower pressure and lower speed.
Has the Danfoss OMR 200 been discontinued?
One reseller says 151-0715 is no longer produced and has been replaced by the OMR X 200, part number 11186665. Ask any seller exactly what they’re offering.
Can Advance Hydraulic Works supply a Danfoss OMR 200 hydraulic motor?
Send the nameplate photos, part number and working pressure to Advance Hydraulic Works and ask about availability, maker and warranty before you commit.
Your next step
Photograph the nameplate, note your pump’s flow and your relief setting, and send everything to Advance Hydraulic Works. You’ll know which size you need before you spend anything.
