Rolled Ball Screws Shaft Dia.20 Lead 5/10/20 Accuracy Grade C7

Brand :

MISUMI

Caution

Product Description

- Rolled Ball Screws Shaft Dia.20 mm Lead 5/10/20 Accuracy Grade C7 from MISUMI.
- This product is an economical option offered by MISUMI.
- Can select 2 types of shaft end, BK shaft end type (C-TBSE) and EK shaft end type(C-TBSB).
- Shaft screw overall length can be configured 200 to 2000mm (1mm increment).
- Screw shaft outer diameter is 20mm.
- 3 Lead sizes can be selected, 5mm, 10mm, 20 mm.
- The lead twisting direction is right.

Economy Rolled Ball Screws Shaft Dia. 20

Precision Adjustable Wear Resistance

- Available in multiple lead sizes for diverse needs.

- C7 grade precision for high accuracy applications.

- Shaft length adjustable within a specified range in 1mm increments

- Right-hand lead twist ensures smooth operation.

- Made from S55C and SCM420 for superior strength and wear resistance.

Economy Rolled Ball Screws Shaft Dia. 20

MISUMI Standard

Cheaper Price

Product Variety

3D CAD
3D CAD Support

Product Overview

1. The product is an Economy series C7 rolled Ball Screw without pre-pressure suitable for a feeding mechanism requiring multi-point positioning.
2. Ball Screw Standard nuts are adopted to meet the requirement of space saving.
3. The shaft end of screw is processed in accordance with standard specifications, so it can be used directly with the support unit without reprocessing. If the shaft end requires alteration, which should be specified according to the catalog.
4. When used in combination with MISUMI’s Economy series support unit, it has a better effect.

Product Comparison

	Model No./Specification Example
	Model No.	Accuracy	Shaft Dia.	Lead	Total Length
MISUMI Conventional Standard Product	BSST2020-800	C7	20	20	800
MISUMI Conventional C-Value Product	C-BSSTA2020-800
Economy Series*	C-TBSB2020-800

■ Lead Accuracy
商品概要

■ Cumulative Lead Error Tolerance

Unit: μm

Accuracy Class	C7	C10
Cumulative Lead Error₍₄₎	52	210

(4) Lead error tolerance value for an arbitrary datum length of 300mm within the effective thread length of the screw shaft
*Lead accuracy is reference for accuracy class C7.
Mounting part accuracy differs from MISUMI conventional products
See ■ Mounting Part Accuracy below

■ Mounting Part Accuracy

Rolled Ball Screw

Unit: mm

Model		Lead	Screw Length		(1) (2) Runout Tolerance (Max.)		(3) Runout Tolerance (Max.)		(4) (5) Perpendicularity Tolerance (Max.)		Axial Clearance

Type	Screw Shaft Outer Dia.		Min.	Max.	Conventional Product (BSST)	Economy Series	Conventional Product (BSST)	Economy Series	Conventional Product (BSST)	Economy Series	Conventional Product (BSST)	Economy Series
C-TBSE	8	2	100	400	0.014	0.027	0.014	0.027	0.007	0.009	0.03 or less	0.05 or less
	10	2/4	150	600
C-TBSE C-TBSB	12	4/5/10	150	800								0.1 or less
	15	5/10/16/20	150	1200
	20	5/10/20	200	2000							0.05 or less*	0.15 or less
	25	5/10/25	200	2000	0.02	0.04	0.02	0.04			0.07 or less*	0.2 or less
	32	5/10/32	300	2000					0.008		ー

*Varies by lead

(1)・(2)

(3)
(4)・(5)

Radial run-out of bearing mouting surface related to the centerline of screw groove.
This measurement item is affected by Total Run-out (8) of the Screw Shaft, and so it must be corrected.
Radial run-out of drive component interface surface in relation to screw shaft support axis.
Perpendicularity of shaft's bearing shoulders in relation to screw shaft support axis.

Dimensional Drawing

Product Drawings of Ball Screw (Unit: mm)
Dimension 1

Specification Table

Alterations

■ Keyway Dimension
商品概要

Shaft Dia.	b		t
Shaft Dia.	Reference Dimension	Tolerance (N9)	Reference Dimension	Tolerance
6 to 7	2	-0.004 -0.029	1.2	＋0.1 0
8 to 10	3	-0.004 -0.029	1.8
11 to 12	4	0 -0.03	2.5
13 to 17	5		3
18 to 20	6		3.5

Screw Shaft Runout Tolerance

Type	Screw Shaft O.D.	Runout tolerance G (Max.)											Incomplete Hardened Area (ℓ)
Type	Screw Shaft O.D.	~125	126~200	201~315	316~400	401~500	501~630	631~800	801~1000	1001~1250	1251~1600	1601~2000	Incomplete Hardened Area (ℓ)
E-TBS	4	0.060	0.075	-	-	-	-	-	-	-	-	-	5
E-TBS	6	0.075	0.075	-	-	-	-	-	-	-	-	-	5
C-TBSE C-TBSB	8	0.080	0.108	0.155	0.185	-	-	-	-	-	-	-	10
	10	-	0.093	0.120	0.155	0.195	0.250	-	-	-	-	-
	12	-	0.093	0.120	0.155	0.195	0.250	-	-	-	-	-
	15	-	0.085	0.100	0.120	0.148	0.180	0.230	0.295	0.380	0.500	0.525
	20	-	0.085	0.100	0.120	0.148	0.180	0.230	0.295	0.380	0.500	0.525	15
	25	-	0.085	0.085	0.100	0.120	0.140	0.165	0.215	0.265	0.345	0.445	15
	32	-	-	0.085	0.100	0.120	0.140	0.165	0.215	0.265	0.345	0.445	20
E-KBS	4	0.050	-	-	-	-	-	-	-	-	-	-	5
E-KBS	6	0.050	0.050	-	-	-	-	-	-	-	-	-
C-KBS	8	0.060	0.075	0.100	-	-	-	-	-	-	-	-
	10	0.055	0.065	0.080	0.100	-	-	-	-	-	-	-
	12	-	0.065	0.080	0.100	0.120	-	-	-	-	-	-	10
	15	-	0.060	0.070	0.080	0.095	0.110	0.140	0.170	0.210	-	-	10
	20	-	0.060	0.070	0.080	0.095	0.110	0.140	0.170	0.210	0.270	-	15
	25	-	-	0.060	0.070	0.080	0.090	0.100	0.130	0.170	0.210	-	15
E-KLR	4	0.050	0.050	-	-	-	-	-	-	-	-	-	5
	8	0.065	0.075	0.100	-	-	-	-	-	-	-	-
	10	0.065	0.065	0.080	0.100	-	-	-	-	-	-	-

Ball Screw Runing Noise Level

Ball screw noise level is affected by several important factors:

The figures below show the noise levels of ball screws with different specifications.
Note:
- These test results are for reference only and do not represent all ball screw specifications.
- Actual noise levels may vary depending on multiple factors.
Misumi C7 grade ball screws have controlled outgoing noise levels and guarantee less than 70 dB at a rotational speed of 1500 RPM.
(Noise measured at a distance of 1 meter from the ball screw)

Product Features

1. Even if it is MISUMI economy series, the inspection standard is the same as that of MISUMI standard products, which implements quality inspection before leaving the factory to provide users with products that meet the specifications of the catalog.
2. Ball Screw It no longer needs drawing processing, saving drawing time, min. shipped in 6 day at the earliest.
3. With a rich shaft end specifications, it has specified additional processing to meet a variety of occasions.

Example of Use

Automatic feeder (the workpiece feeds by the moving and positioning of the slider driven by the Ball Screw via the stepping motor)
Example of Use 1

Precautions

■ Selection and Precautions for Use of Ball Screw
● Rotating the nut by hand may not feel smooth, but does not affect the positioning precision, so this product is suitable for multi-point positioning feeding mechanism. Please feel free to use.
● If the operation requires low runout (e.g. machining equipment), please use MISUMI standard products.
In operation, if there is too much noise or sharp and harsh sound, please make sure that the installation accuracy of the screw and the specifications of peripheral components such as motors and couplings are appropriate.
● Lithium soap grease. SHC32 (red) has been applied.
Do not let the nut exceed the movement range of the ball screw nut, or screw out of the Ball Screw shaft, otherwise the ball will fall off and the ball cycling parts will be damaged.
● Ball Screw and nuts placed with an inclination may fall due to weight. Please be careful.
● 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 of the Ball Screw and peripheral parts design and assembly
The Ball Screw is a component that only bears axial load. If it is subjected to radial load or moment load, poor sliding, vibration or abnormal noise may occur, shortening its service life.
The reason that the Ball Screw bears radial load and moment load is the axis deviation and parallelism error of the surrounding parts. Therefore, it is necessary to correctly design and assemble the peripheral parts of the Ball Screw to prevent errors.
● Axis deviation of Ball Screw and support unit (Fig. 1)
- Axis deviation is the deviation of the Ball Screw fixed by the fixed side support unit and the bearing of the supporting side support unit.
- The allowable value of the axis deviation is 20μ or less (reference value)
●Parallelism between Ball Screw and linear guide (Figure 2)
- Parallelism error refers to the inclination of the Ball Screw in the up-down or left-right direction with respect to the reference of the linear guide.
- The allowable value of inclination is below 1/2000 (Figure 3)
●Precautions of assembly
If you notice abnormal noises during the operation of the Ball Screw or jamming during movement after assembly, please loosen the connections of the parts before proceeding. Adjust and reassemble after moving smoothly.
- Error in the left and right direction of the support unit (Fig. 1)
- Parallel error of linear guide and Ball Screw (Fig. 2)
- Fixing of workbench and nut bracket
- Fixing of Ball Screw nut and nut bracket

·Removal of nut is prohibited	·No impact on the nut	·Be careful of falling due to weight


·Checking for reverse action	·Pay attention to intrusion of foreign objects	·Nut overstroke is prohibited

Related Products

Ball Screw Type	(Economy series) support unit Standard square type		(Economy series) support unit Round type
Ball Screw Type	Fixed side model	Support side model	Fixed side model	Support side model
C-TBSE	C-TEK15	C-TEF15	C-TFK15	C-TFF15
C-TBSE

Ball Screw Type	(Economy series) support unit Narrow pitch square type
	Fixed side model	Support side model
C-TBSB	C-TBK15	C-TBF15