Rolled Ball Screws Shaft Dia.10 Lead 2/4 Accuracy Grade C7

Screw Shaft Runout Tolerance

■Precautions for Selection and Use
●Rotating the nut by hand may not feel smooth, but does not affect the positioning accuracy, so this product is suitable for multi-point positioning feeding mechanism. Please feel free to use.
●If low runout is required during operation (e.g., machining equipment), please use MISUMI Standard products.
●During operation, if excessive noise or sharp, piercing sounds occur, please be sure to confirm the installation accuracy of the screw and whether the specifications of peripheral components such as motors and couplings are appropriate. MISUMI does not guarantee the noise level after the screw is assembled.
●Although lithium soap-based grease is applied at the factory, new grease should be injected every 2 to 3 months after receipt as a standard, otherwise performance will be affected.
●Do not allow the nut to exceed the ball screw nut travel range or screw it off the screw shaft, as this will cause balls to fall out and damage ball circulation parts.
●Please note that placing the ball screw and nut at an incline may cause them to fall due to their own weight.
●This product is a machined type, so there will be knife patterns and color difference in its appearance. Small scratches or color changes without affecting the use and main function are of a normal phenomenon. Please feel free to use.

■Precautions for Design and Assembly of Ball Screws and Peripheral Parts
A ball screw is a component that only bears axial loads. If it is subjected to radial loads or moment loads, it may lead to poor sliding, vibration, and abnormal noise, thereby shortening the service life.
The causes of radial and moment loads on ball screws are axial deviation and parallelism errors of surrounding components. Therefore, to prevent errors, peripheral parts of the ball screw must be correctly designed and assembled.
●Axial misalignment between the ball screw and the support unit assembly (Fig. 1)
-Axial deviation refers to the deviation between the axis of the ball screw fixed by the fixed-side support unit and the axis of the bearing in the supported-side support unit.
-Allowable axial deviation value: 20μ or less (reference value)
●Parallelism between the ball screw and the linear guide (Fig. 2)
-Parallelism error refers to the vertical or horizontal tilt of the ball screw relative to a reference such as a linear guide.
-Allowable tilt value: 1/2000 or less (Fig. 3)
●Precautions during Assembly
If abnormal noise is detected during ball screw operation or if sticking occurs during movement after assembly, please loosen the connections of each component to adjust, and reassemble after smooth movement is achieved.
-Error in the horizontal direction of the support unit (Fig. 1)
-Parallelism error between the linear guide and the ball screw (Fig. 2)
-Fixing of the worktable and the nut bracket
-Fixing of the ball screw nut and the nut bracket

■ Support Side

Alterations	Code	Spec.
① No machining on support side shaft end	NC	No machining added on the support side shaft end. Ordering Code NC
② Changes the nut direction	RLC	Changes the nut direction. Ordering Code RLC
③ No machining of support side shaft end retaining ring groove	RNC	No machining of support side shaft end retaining ring groove. Ordering Code RNC
④ Change the length of the support side shaft end	FC	Changes the length of the support side shaft end. 10≤FC≤20 FC = 1mm increments Ordering Code FC20

■ Fixed Side

Alterations	Code	Spec.
⑤ Machining of wrench flats on fixed side Incomplete hardened area	SZC	Adds wrench flats on the fixed side shaft end. Ordering Code SZC Ball bearings will fall out if the ball nut crosses the wrench flats The nut may not be able to move to the incomplete hardening range; please be careful when selecting.
⑥ Machining of keyways on fixed side shaft end Detailed dimensions of the keyway P.1	KC	Adds a keyway on the fixed side shaft end. 2≤KC≤8 When specified simultaneously with ⑩,2≤KC≤F-1 Not applicable for P=5 KC = 1mm increments Ordering Code KC5
⑦ Machining of keyways on fixed side shaft end	KLC	The position of the fixed side shaft end keyway machining can be specified. (Keyway dimensions are the same as KC.) 2≤K≤7 K+S≤8 When specified simultaneously with ⑩,2≤K≤16 K+S≤F-1 K>b(Keyway width) Not applicable for P=5 K, S = 1mm increments Ordering Code KLC-K5-S2
⑧ Machining of flat on fixed side shaft end	SC	Adds a flat on the fixed side shaft end. 5≤SC≤8 When specified simultaneously with ⑩,5≤SC≤F-1 SC = 1mm increments Ordering Code SC7
⑨ No machining of small steps on the fixed side	NF	No machining of small steps on the fixed side Ordering Code NF
⑩ Change Fixed-side Small Step Dimensions Recommended	FP	Changes the fixed side small step dimensions 9≤F≤18 5≤P≤6 F, P = 1mm increments Ordering Code FP-F18-P6
⑪ Change Fixed-side Large Step Dimensions Recommended	EU	Changes the fixed side large step dimensions 11≤E≤35 8≤U≤E-3 E, U = 1mm increments Ordering Code EU-E35-U10
⑫ No machining of fixed side large step male thread	NU	No machining of fixed side large step male thread Ordering Code NU