SFY Dual Circuit Fast Feed Ballscrew

Product Details

The SFY nut contains two recirculation circuits arranged around the screw shaft. Each circuit returns the balls to the beginning of the loaded path after they pass through the nut.

 

Two specification groups appear in the dimension sheet:

SFY1616 to SFY5050: screw lead equals the nominal shaft diameter.

SFY01632 to SFY050100: screw lead is twice the nominal shaft diameter.

 

The model number identifies the shaft and lead combination. For example, SFY1616 uses a 16 mm shaft with a 16 mm lead, while SFY01632 combines a 16 mm shaft with a 32 mm lead.

 

Product Description

The first SFY group uses 1.8 × 2 circulation turns. The double-lead group uses 0.8 × 2 turns because less thread length is available inside the nut for each circuit.

 

This difference affects more than the distance moved per revolution. The equal-diameter lead group has higher listed load ratings and nut rigidity than the corresponding double-lead group. A double-lead model should therefore be selected only after checking axial load and support conditions.

 

The nut flange contains four threaded mounting positions and a lubrication port. The customer's nut bracket must leave access to the oil hole after assembly. Blocking this position can make later lubrication difficult.

 

The screw thread is produced by rolling. Accuracy class, axial clearance and preload should be stated separately rather than inferred from the SFY series name.

 

Overall shaft length and both machined ends depend on the selected bearing supports, locknut and coupling. These dimensions must be supplied before the shaft is cut and machined.

 

Product Information

Selection Point	SFY Series Data
Screw Production	Rolled thread
Nut Construction	Flanged nut with two circulation circuits
Shaft Diameter Range	16–50 mm
Lead Range	16–100 mm
Equal-Diameter Lead Models	SFY1616, SFY2020, SFY2525, SFY3232, SFY4040 and SFY5050
Double-Diameter Lead Models	SFY01632, SFY02040, SFY02550, SFY03264, SFY04080 and SFY050100
Circulation Turns	1.8 × 2 or 0.8 × 2 according to model group
Nut Mounting	Four-hole flange
Lubrication Connection	M6 oil hole shown in the drawing
Required Order Data	Model, shaft length, accuracy, clearance or preload and end-machining drawing

 

 

FAQ

What does SFY1616 identify?

It identifies an SFY assembly with a 16 mm nominal screw diameter and a 16 mm lead.

How is SFY01632 different?

It uses the same 16 mm shaft diameter but provides 32 mm of nominal travel per screw revolution.

Does a larger lead automatically make the machine faster?

It increases travel per revolution, but usable speed still depends on screw length, critical speed, motor torque, support bearings and acceleration.

Why does the double-lead group have lower listed rigidity?

Its nut uses shorter loaded ball paths for each circulation circuit. The published rigidity and load data must be checked for the selected model.

Is the screw supplied with finished bearing and motor ends?

End machining can be provided, but both ends must follow the selected bearing supports, locknut and coupling dimensions.

Can the shaft length and end details be produced from a drawing?

We build to customer drawings under OEM/ODM, and accept orders as small as a single piece for standard sizes.

 

About Us

Lishui Guangyuan Industry & Trade Co Ltd supplies rolled ball screws, matching nuts and machined shaft assemblies for industrial motion systems.

 

Hot Tags: sfy dual circuit fast feed ballscrew, Chinasfy dual circuit fast feed ballscrew suppliers, manufacturers, factory, Ball Screw, Ball Screw 3000mm, Ball Screw CNC, Heavy Duty Ball Screw, Rotating Nut Ball Screw, SFU1610 Ball Screw