SFU2005 Ball Screw
20mm Diameter Precision Linear Motion – Built for CNC, Robotics, and Heavy-Duty Automation
Understanding the SFU2005 Ball Screw in Linear Motion Systems
I've handled ball screw orders for years as an export manager at YIDI Motion, and the SFU2005 model comes up constantly. It's that workhorse 20mm diameter screw with a 5mm lead—compact enough for tight builds but tough for demanding runs. Procurement folks from US machine shops to European automation integrators reach out because it hits the sweet spot for precision without breaking the bank.
Picture this: you're speccing out a CNC router retrofit. Lead screws chatter under load, belts slip on acceleration. Enter the 2005 ball screw. Circulating steel balls between the screw and nut cut friction to under 1%, turning rotary motion into linear push with minimal backlash. We've shipped thousands to 50+ countries, from dusty US warehouses to humid Japanese fabs. Reliability? It's in the grinding process—our German-imported grinders hit C5 dynamic accuracy straight off the line.
But let's not gloss over realities. Not all "2005 ball screws" are equal. Rolled versions from low-end suppliers warp under preload. Ours? SCM440 alloy steel, hardened to 58-62 HRC, with a full complement of 4mm balls in a double-nut setup. That means 5-10kN dynamic load capacity, depending on your end supports. Importers know: cheap imports fail early on vertical apps. We've seen returns drop 40% just by switching clients to our preloaded nuts.
Operations managers appreciate the logistics side too. A standard 1m length weighs under 5kg, fits easy in 20ft containers—up to 400 units per pallet without customs headaches. Lead times? 7-15 days for stock, 25-35 for customs. No wild promises; we quote FOB Xingang exact. And for OEMs, we tweak pitches or lengths—last month, a Canadian firm ordered 1.2m versions with custom flanges.
Why does this matter for your next project? Search "2005 ball screw" and you'll drown in listings. But buyers stick with us because we talk straight: tolerances hold at ±0.01mm/m under 1000rpm. Heat buildup? Manage it with our optional cooling sleeves. We've consulted on installs where ignoring axial play cost downtime. Short story: pair it right with BK12/BF12 supports, and you're looking at 20,000+ hours MTBF.
Over coffee with a Texas importer last week, he griped about supplier ghosting post-order. That's not us. YIDI's 100-person team—30% senior techs—runs ISO9001 checks on every batch. Exported to Germany, USA, even picky Japanese OEMs. If you're sizing for XY tables or Z-axis lifts, this screw delivers. Curious about nut types? SFU for flange mount, SFI for block. We stock both.
One more operational note: preload matters. Zero-backlash double nuts add stiffness but hike torque 20-30%. Fine for slow slides; rethink for high-speed spindles. Our engineers spec it per app—free consult via adam@yidimotion.com. We've optimized dozens this way, saving clients on motor upsizing.
This isn't hype. It's what happens when you source from a factory like ours in Shijiazhuang, not a trader markup. Next up, the nitty-gritty specs.
Deep Dive: Engineering Specs for the SFU2005 Ball Screw
Let's cut to the core. The SFU2005 isn't a generic part. Root diameter 18mm, effective 20mm OD. Lead 5mm per turn—slow and precise for positioning, not rapid traverse. Ball dia 4.762mm, 25 balls per circuit typically. We grind shafts to h6 tolerance, nuts to H6.
| Parameter | SFU2005 Spec | Notes |
|---|---|---|
| Diameter (mm) | 20 | Nominal, ground finish Ra 0.8-1.6 |
| Lead (mm) | 5 | Single start, right-hand standard |
| Accuracy Grade | C5 / C3 optional | ±0.018mm/300mm for C5 |
| Dynamic Load (kN) | 8.35 | Ca value, per nut |
| Static Load (kN) | 15.6 | C0, with preload |
| Nut Weight (kg/m) | 0.56 | Flange type |
| Max Length (mm) | 4000 | Whip-free, custom longer w/ supports |
| Material | SCM440 / CF53 | Hardened, black oxide optional |
Preload options: light (0.02C), medium (0.04C). Torque calc? Fr = 0.02 x load for basic. But factor in speed—over 2000rpm, whip kicks in without fixed-fixed supports. We recommend BK/BF combos for most setups. Material note: SCM440 resists pitting better than 4140 in contaminated envs.
End machining? D1 ends standard for couplings. Custom threads or flanges? No upcharge under 100pcs. We've done left-hand leads for mirror setups—ask about it.
- Key Tolerance: Lead error ≤12μm/300mm C5. Cumulative drift minimal.
- Ball Retainer: POM or brass, low noise.
- Lubrication: Grease ports standard; pair with lithium NLGI2.
- Temp Range: -10°C to 80°C continuous.
Where SFU2005 Ball Screws Excel – Application Breakdown
CNC routers top the list. 5mm lead gives fine 0.005mm steps with NEMA23 steppers. Z-axis on mills? Handles 50kg easy. Robotics arms use them for joint drives—stiff enough for payload swings.
Factory automation: pick-and-place XY tables. Speed? 250mm/s max practical. 3D printers? Overkill but backlash-free for pros. Medical equip? C3 grade for scanners. Even solar trackers—low speed, high duty.
High-Precision Fits
- CNC mills/routers
- Linear actuators
- Engraving machines
Heavy Duty
- Vertical lifts
- Packaging lines
- Testing rigs
Warning from the floor: dust kills balls fast. Seal nuts mandatory for shops. Vibration? Double-nut preload eats it.
Buyer's Guide: Sourcing Your 2005 Ball Screw Right
Purchasing directors hate surprises. First, match accuracy to need—C5 for most, C3 if sub-micron. Nut style: flange for panels, block for carriages. Length calc: add 2x stroke + 100mm overrun.
Risks? Undersized supports cause deflection. Freight? LTL for samples, FCL for volume. Duty codes HS8483.40. We handle docs—commercial invoice, packing list, CIQ certs.
Compare suppliers:
| Factor | Low-End Import | YIDI SFU2005 |
|---|---|---|
| Accuracy | C7-C10 | C5/C3 |
| Load Capacity | 4-6kN | 8.35kN+ |
| Lead Time | 45+ days | 7-25 days |
Tip: Request preload certs. Test on arrival—dial indicator on carriage travel. Off? Swap under warranty.
For OEM: MOQ 10pcs, CAD files welcome. Pricing? Volume tiers—call +86 18134111662.
What Buyers Say About Our 2005 Ball Screws
Mark T., CNC Shop Owner, Texas USA
"Swapped to YIDI's SFU2005 on our router gantry. Backlash gone, cuts smoother at 1/4" depth. Freight quick, 12 days door. Solid value."
Luca R., Automation Engineer, Italy
"C5 accuracy spot-on for our XY stage. Preloaded nuts stiff—no settling. OEM flanges matched perfect. Recommended."
Kenji S., Robotics Firm, Japan
"1.5m lengths stable at 1500rpm. Better than local brands. Support team adjusted ends free. Exports seamless."
Sarah L., Procurement Mgr, Canada
"Volume order 200pcs—packaging pro, no damage. Load tests passed 10kN. Pricing beat competitors 15%."
Frequently Asked Questions on SFU2005 Ball Screws
Q: What's the max speed?
A: 250mm/s practical; rpm limit ~5000 based on length/whip.
Q: Single vs double nut?
A: Single for light duty; double for zero backlash, higher torque.
Q: Custom lengths?
A: Up to 4m stock; longer w/ tandem. 0.5mm increments.
Q: Warranty?
A: 12 months material/workmanship. Lifetime tech support.
Q: Shipping to USA?
A: DHL 3-7 days samples; sea 20-30 days bulk. Duties covered in quote.
Ready to Spec Your Project?
Talk to our engineers. Free samples for qualified buyers.
+86 18134111662 | adam@yidimotion.com
Our Shijiazhuang facility: German/Japanese CNC grinders, 100% inline inspection.
