Ball screws / compact flange / diameter 12, 14 / pitch 4, 5, 10 / C7, C10 / steel / phosphated / 58-62HRC

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MISUMI

BSSR,BSSRK,BSST,BSSZ,BSSZK

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Drawing / Specifications
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Part Numbers
More Information
Catalog
Technical Information

Dimensional Drawing

● Shaft Dia. 12, Lead 04
BSST·BSSR (K)·BSSZ (K)·BSRR (K)

Rolled Ball Screw - STD Nut, Shaft Dia. ø12/14, Lead 4/5/10: Related Image

View X-X

* Collar included (1 pc.) "M" Material: EN 1.1191 Equiv. "S" Surface Treatment: Black Oxide

● Shaft Dia. 12, Lead 10
BSSR (K)·BSSZ (K)·BSRR (K)

View X-X

* Collar included (1 pc.) "M" Material: EN 1.1191 Equiv. "S" Surface Treatment: Black Oxide

● Shaft Dia. 14, Lead 05
BSSR (K)·BSSZ (K)·BSRR (K)

View X-X

* Collar included (1 pc.) "M" Material: EN 1.1191 Equiv. "S" Surface Treatment: Black Oxide

Nut Type	Type		Accuracy Grade	Shaft Dia.	Lead	Screw Shaft			Nut
	Standard	F, P Configurable				[M] Material	[H] Hardness	[S] Surface Treatment	[M] Material	[H] Hardness	[S] Surface Treatment
Standard Nut	BSST	—	C7	12	4	EN 1.1203 Equiv.	Induction hardened 56 to 62HRC	—	EN 1.7264 Equiv.	Carburized 58 to 62HRC	[ ! ] Phosphate Conversion Coating
	BSSR	BSSRK	C10	12·14	4·5·10			Phosphate Conversion Coating			Phosphate Conversion Coating Coating treatment
	BSSZ	BSSZK						—
	BSRR	BSRRK						Low Temperature Black Chrome Plating

[ ! ] Mounting surface of BSST ball nut flange is not surface-treated.

Specification Table

Part Number	—	L	—	F	—	P
BSSZ1204 　BSSZK1210 BSSR1204L BSSR1405G	— — — —	200 370 370 370
			—	F20	—	P8
			(L Type Greased)
			(G Type Greased)

Nut
Type

Accuracy
Grade

Part Number

1 mm Increments

Ball Dia.

Ball
Center Dia.

Screw Root Dia.

Number of Circuits

Basic Load Rating

Axial Play
Clearance

Twisting
Direction

Type

Screw Shaft O.D.

Lead

* F

* P

C (Dynamic) kN

Co (Static) kN

Standard
Nut

BSST

150 to 795

L－65

2.3812

12.6

(10)

2.5 turns, 1 row

2.6

5.8

0.03 or Less

Right

C10

BSSR BSSZ BSRR

150 to 800

0.05 or Less

BSSRK BSSZK BSRRK

15 to 24

5 to 8

L－ (50+F)

BSSR BSSZ BSRR

150 to 800

L－65

3.175

12.8

(9.6)

1.5 turns, 1 row

2.85

4.95

0.10 or Less

BSSRK BSSZK BSRRK

15 to 24

5 to 8

L－ (50+F)

BSSR BSSZ BSRR

150 to 800

L－65

14.5

(11.2)

2.5 turns, 1 row

4.4

7.3

BSSRK BSSZK BSRRK

15 to 24

5 to 8

L－ (50+F)

* F and P are configurable for BSSRK, BSSZK, and BSRRK only. [!] F ≤ P × 3. [!] Y (Nut Motion Range) > (Nut Overall Length). kgf = N × 0.101972

Alterations

Part Number	—	L	—	F	—	P	—	(FC·KC, etc.)
BSSR1204	—	270					—	SC7

Alterations

Code

Spec.

Alterations

Code

Spec.

No Machining on Both Shaft Ends

[ ! ]A nut is mounted to the temporary shaft before the product is shipped.

WNC

Does not machine any of the both shaft ends.
Ordering Code WNC-S20-F80
[ ! ] Annealing may lower hardness on the annealed area + 25 mm fore and aft.
　
[ ! ]S+F ≤ L/2 [ ! ]L－ (S+F) ≤ Y+50
[ ! ] On the annealed area + 25 mm fore and aft, axis run-out may be larger than indicated by the Catalog standard.
　

Wrench Flats on Fixed Side

Incomplete Hardened Area

SZC

Adds wrench flats on the fixed side shaft end.

Ordering Code SZC	Shaft Dia.	A	B	(C)
	12	8	5	20
	14	10	7	22

[ ! ] Ball bearings will fall out, if the ball nut
crosses the wrench flats.

No Machining on Support Side Shaft End

No machining added on the support side shaft end.
Ordering Code NC

Keyway on Fixed Side Shaft End

Adds a keyway on the fixed side shaft end.
[NG] Not applicable to P = 5.
KC = 1 mm Increments
Ordering Code KC10
[ ! ]3 ≤ KC ≤ P × 3 KC ≤ F－1

Ball Nut Orientation Reversed

	(Support Side) (Fixed Side)
	Standard
	Change

RLC

Changes the nut direction.
Ordering Code RLC

Keyway on Fixed Side Shaft End

KLC

The position of keyway on fixed side shaft end can be specified.
(Keyway dimensions are the same as KC.)
[NG] Not applicable to P = 5.
K, S = 1 mm Increments
Ordering Code KLC-K5-S2
[ ! ]4 ≤ K+S ≤ P × 3 K+S ≤ F－1

No Retaining Ring Groove on Support Side Shaft End

RNC

No Retaining Ring Groove on Support Side Shaft End.
Ordering Code RNC
[NG] Combination with FC is not available.

Flat Machined on Fixed Side Shaft End

Adds a flat on the fixed side shaft end.
SC = 1 mm Increments
Ordering Code SC7
[ ! ]5 ≤ SC ≤ P × 3 SC ≤ F－1

Change Support Side Shaft End Machining

Changes the machining on the support side.
For the screw shaft 12, Q is selectable from 6 or 8; for the screw shaft 14
, Q is selectable from 6, 8 or 10
G = 1 mm Increments
Ordering Code GC-Q8-G20
[ ! ] 5 ≤ G ≤ Q × 3 [ ! ] Y dimension is shortened.
[ ! ] No Retaining Ring Groove [ NG ] Combination with FC is not available

Flat Machined on Fixed Side Shaft End (2 Locations)
SWC SGC

SWC
SGC

Adds two flats on the fixed side shaft end.
SWC: 90° Position SGC: 120° Position
1 mm Increments
Ordering Code SWC7
[ ! ]5 ≤ SWC·SGC ≤ P × 3 SWC·SGC ≤ F－1

Change Support Side Shaft End Length

Changes the length of the support side shaft end.
FC = 1 mm Increments
Ordering Code FC20
[ ! ]11 ≤ FC ≤ 20
[ ! ] Y dimension is shortened.
[NG] Combination with GC is not available

Installing Special Temporary Shaft

TAS

Dedicated
Temporary Shafts suitable for Ball Screws are installed.
When removing Nut from Screw Shaft, always use Special Temporary Shaft.

General Information - Ball Screws

Ball screw drive - ball screw drive, nut stop - ball screw drive, nut damper - ball screw drive, block shape - ball screw drive, nut mount

Ball Screw Selection Details

- Material: steel

- Coatings: uncoated, LTBC coating, phosphate conversion coating

- Heat treatment: up to 62HRC

- Precision category: C3, C5, C7, C10

- Precision classes: precision class, standard class

- Slope: 1 to 32 mm

- Outer diameter: 6 to 32 mm

- Length (mm): 100 to 2000

- Nut shape: round flange, square flange, compact flange, block shape

Description/Basics

Ball screws are intended for converting rotary motion to linear motion. This can also be done in reverse order from linear to rotary motion. With the ball screws, this is achieved extremely precisely due to their low play. In mechanical engineering, the ball thread drive is an indispensable feature and is indispensable in precision applications. These work in horizontal and vertical orientation, allowing to shift, raise and lower devices.
The ball screws are often driven by motors and shaft couplings, or manually via rotary/crank handles.
When utilising a keyway, it is recommended using a machine key, as these can be combined excellently due to the manufacturing tolerances.
For a smooth process, it is recommended installing the ball screw with a fixed bearing and a floating bearing. This ensures that the ball screw does not bend due to compression and generate vibrations. For this purpose, MISUMI offers the right support units drives in various designs. For more information on how to install ball screws, see the Installation Instructions available as a PDF.
Ball screw nuts are available in different shapes. These enable versatile utilisation, even in confined spaces. Due to their high precision, the ball screws can also provide a high level of repeatability that is necessary in precise positioning applications. These can be utilised, for example, for measuring devices or in 3D printing. It is recommended to use a pre-stressed ball screw for highly precise applications. Due to the pre-tensioning, the axial play is almost zero unlike a conventional ball screw. In addition, MISUMI offers single axis actuators (locating units) for such applications, which as drives are already equipped with precise ball screws.
In smaller applications, a slide screw or a so-called miniature screw drive can be used. Due to their design, these are very compact, but suitable for lower axial loads.
If very high forces occur, a lead screw could also be considered.
Which ball screw is the right one for your application must be calculated based on the existing factors and influences. You can use the selection Ball Screws that is available as a PDF for this purpose. You can also find the service life calculation in this link.

Overview of Screw Drives as PDF

Application Examples - Ball Screws

Application example for positioning stages
(1) Linear guide accessories, (2) Standard linear guide, (3) Table plate (meviy), (4) Ball screw, (5) Support units

Ball screw drive with bearing housing and damper - nut stop for ball screw drives - fixed bearings and floating bearings for ball screw drives

Application example for the ball screw
(1)) Support units, (2) Ball screw nut stops, (3) Ball screw, (4) Ball screw nut mountings

Lifting table and lifting device with ball screw drive - lifting table with rotary handle - lifting table with crank

Application example for a lifting device
(1) Ball screw, (2) Standard linear guide, (3) Support units, (4) Table top (meviy)

(1) Ball screw, (2) Standard linear guide, (3) Support units, (4) Table top (meviy)

Industrial Applications

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry

Part Number:

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Part Number
BSRR1204-[150-800/1]
BSRR1204G-[150-800/1]
BSRR1204L-[150-800/1]
BSRR1210-[150-800/1]
BSRR1210G-[150-800/1]
BSRR1210L-[150-800/1]
BSRR1405-[150-800/1]
BSRR1405G-[150-800/1]
BSRR1405L-[150-800/1]
BSRRK1204-[150-800/1]-F[15-24/1]-P[5-8/1]
BSRRK1204G-[150-800/1]-F[15-24/1]-P[5-8/1]
BSRRK1204L-[150-800/1]-F[15-24/1]-P[5-8/1]
BSRRK1210-[150-800/1]-F[15-24/1]-P[5-8/1]
BSRRK1210G-[150-800/1]-F[15-24/1]-P[5-8/1]
BSRRK1210L-[150-800/1]-F[15-24/1]-P[5-8/1]
BSRRK1405-[150-800/1]-F[15-24/1]-P[5-8/1]
BSRRK1405G-[150-800/1]-F[15-24/1]-P[5-8/1]
BSRRK1405L-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSR1204-[150-800/1]
BSSR1204G-[150-800/1]
BSSR1204L-[150-800/1]
BSSR1210-[150-800/1]
BSSR1210G-[150-800/1]
BSSR1210L-[150-800/1]
BSSR1405-[150-800/1]
BSSR1405G-[150-800/1]
BSSR1405L-[150-800/1]
BSSRK1204-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSRK1204G-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSRK1204L-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSRK1210-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSRK1210G-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSRK1210L-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSRK1405-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSRK1405G-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSRK1405L-[150-800/1]-F[15-24/1]-P[5-8/1]
BSST1204-[150-800/1]
BSST1204G-[150-800/1]
BSST1204L-[150-800/1]
BSSZ1204-[150-800/1]
BSSZ1204G-[150-800/1]
BSSZ1204L-[150-800/1]
BSSZ1210-[150-800/1]
BSSZ1210G-[150-800/1]
BSSZ1210L-[150-800/1]
BSSZ1405-[150-800/1]
BSSZ1405G-[150-800/1]
BSSZ1405L-[150-800/1]
BSSZK1204-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSZK1204G-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSZK1204L-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSZK1210-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSZK1210G-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSZK1210L-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSZK1405-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSZK1405G-[150-800/1]-F[15-24/1]-P[5-8/1]
BSSZK1405L-[150-800/1]-F[15-24/1]-P[5-8/1]

Minimum order quantity	Standard Shipping Days ?	RoHS	Accuracy Grade	Screw Shaft O.D. (mm)	Lead (mm)	Axial Play	Number of Circuits (Rows x Windings)	Shaft Overall Length L (mm)	Basic Load Rating Dynamic Rating (N)	Basic Load Rating Static Rating (N)	Grease Type	Shaft End Length F (mm)	Shaft Dia. P (Ø)	Screw Shaft Surface Treatment	Shaft End Dimension (Fixed, Configurable)
1	14 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Standard	15	8	LTBC Plating	Stationary
1	16 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type G	15	8	LTBC Plating	Stationary
1	16 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type L	15	8	LTBC Plating	Stationary
1	14 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Standard	15	8	LTBC Plating	Stationary
1	16 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type G	15	8	LTBC Plating	Stationary
1	16 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type L	15	8	LTBC Plating	Stationary
1	14 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Standard	15	8	LTBC Plating	Stationary
1	16 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type G	15	8	LTBC Plating	Stationary
1	16 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type L	15	8	LTBC Plating	Stationary
1	14 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Standard	15 ～ 24	5 ～ 8	LTBC Plating	Configuration
1	16 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type G	15 ～ 24	5 ～ 8	LTBC Plating	Configuration
1	16 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type L	15 ～ 24	5 ～ 8	LTBC Plating	Configuration
1	14 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Standard	15 ～ 24	5 ～ 8	LTBC Plating	Configuration
1	16 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type G	15 ～ 24	5 ～ 8	LTBC Plating	Configuration
1	16 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type L	15 ～ 24	5 ～ 8	LTBC Plating	Configuration
1	14 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Standard	15 ～ 24	5 ～ 8	LTBC Plating	Configuration
1	16 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type G	15 ～ 24	5 ～ 8	LTBC Plating	Configuration
1	16 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type L	15 ～ 24	5 ～ 8	LTBC Plating	Configuration
1	7 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Standard	15	8	Phosphate Coating	Stationary
1	9 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type G	15	8	Phosphate Coating	Stationary
1	9 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type L	15	8	Phosphate Coating	Stationary
1	7 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Standard	15	8	Phosphate Coating	Stationary
1	9 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type G	15	8	Phosphate Coating	Stationary
1	9 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type L	15	8	Phosphate Coating	Stationary
1	7 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Standard	15	8	Phosphate Coating	Stationary
1	9 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type G	15	8	Phosphate Coating	Stationary
1	9 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type L	15	8	Phosphate Coating	Stationary
1	7 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Standard	15 ～ 24	5 ～ 8	Phosphate Coating	Configuration
1	9 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type G	15 ～ 24	5 ～ 8	Phosphate Coating	Configuration
1	9 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type L	15 ～ 24	5 ～ 8	Phosphate Coating	Configuration
1	7 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Standard	15 ～ 24	5 ～ 8	Phosphate Coating	Configuration
1	9 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type G	15 ～ 24	5 ～ 8	Phosphate Coating	Configuration
1	9 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type L	15 ～ 24	5 ～ 8	Phosphate Coating	Configuration
1	7 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Standard	15 ～ 24	5 ～ 8	Phosphate Coating	Configuration
1	9 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type G	15 ～ 24	5 ～ 8	Phosphate Coating	Configuration
1	9 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type L	15 ～ 24	5 ～ 8	Phosphate Coating	Configuration
1	7 Days	10	C7	12	4	0.030 or Less	1 x 2.5	150 ～ 800	2600	5800	Standard	15	8	Not Provided	Stationary
1	9 Days	10	C7	12	4	0.030 or Less	1 x 2.5	150 ～ 800	2600	5800	Type G	15	8	Not Provided	Stationary
1	9 Days	10	C7	12	4	0.030 or Less	1 x 2.5	150 ～ 800	2600	5800	Type L	15	8	Not Provided	Stationary
1	7 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Standard	15	8	Not Provided	Stationary
1	9 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type G	15	8	Not Provided	Stationary
1	9 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type L	15	8	Not Provided	Stationary
1	7 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Standard	15	8	Not Provided	Stationary
1	9 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type G	15	8	Not Provided	Stationary
1	9 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type L	15	8	Not Provided	Stationary
1	7 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Standard	15	8	Not Provided	Stationary
1	9 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type G	15	8	Not Provided	Stationary
1	9 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type L	15	8	Not Provided	Stationary
1	7 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Standard	15 ～ 24	5 ～ 8	Not Provided	Configuration
1	9 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type G	15 ～ 24	5 ～ 8	Not Provided	Configuration
1	9 Days	10	C10	12	4	0.05 or Less	1 x 2.5	150 ～ 800	2600	5800	Type L	15 ～ 24	5 ～ 8	Not Provided	Configuration
1	7 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Standard	15 ～ 24	5 ～ 8	Not Provided	Configuration
1	9 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type G	15 ～ 24	5 ～ 8	Not Provided	Configuration
1	9 Days	10	C10	12	10	[0.10 or Less] 0.10 or Less	1 x 1.5	150 ～ 800	2850	4950	Type L	15 ～ 24	5 ～ 8	Not Provided	Configuration
1	7 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Standard	15 ～ 24	5 ～ 8	Not Provided	Configuration
1	9 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type G	15 ～ 24	5 ～ 8	Not Provided	Configuration
1	9 Days	10	C10	14	5	[0.10 or Less] 0.10 or Less	1 x 2.5	150 ～ 800	4400	7300	Type L	15 ～ 24	5 ～ 8	Not Provided	Configuration

Specifications/Overview

■ Notes
[ ! ] Mounting surface of BSST ball nut flange is not surface-treated.
[ ! ] Filled with lithium soap based grease (Alvania Grease S2 made by Showa Shell Sekiyu K.K).
[ ! ] Alternative grease types available.
[ ! ] Cautions: Do not let the nuts overrun or remove the nuts from the screw shafts. It may cause the balls to fall out or damage the ball recirculation parts.
[ ! ] The collar included with this product should be installed in the same position as indicated with the "*Collar" text on the drawing.
In addition, the collar included with the Support Unit product should be installed and tightened on the nut side of the ball screw.
[ ! ] Note that, when a ball screw shaft or ball screw nut is tilted, it may be fallen out by its own weight.

■Combination with Support Units

Ball Screw Part Number			Recommended Support Unit
Type	Screw Shaft O.D.	Lead	Part Number		Shape	Fixed Side	Support Side
			Type	No.
BSST BSSR BSSZ BSRR	12	04 10	BRW	10S	Round	○
			BUR	10			○
			BSW	10S	Square	○
			BUN	10			○
BSSR BSSZ BSRR	14	05	BRW	10	Round	○
			BUR	10			○
			BSW	10	Square	○
			BUN	10			○

[!] Other than the part numbers shown above, a rich variety of Support Units are also available.

■Combination with Nut Brackets

Ball Screw Part Number			Recommended Nut Bracket
Type	Screw Shaft O.D.	Lead	Part Number
			Type	No.
BSST BSSR BSSZ BSRR	12	04	BNFB BNFM BNFR BNFA	1204R
		10		1210S
	14	05		1405R

[!] Other than the part numbers shown above, a variety of Nut Brackets are also available.

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Basic information

Type	Rolled	Nut Type	Standard Nuts	Package Products/Single Item	Set
Flange Shape	Round Chamfered	Preload	Not Preloaded	Conditions of Use	Standard
Twisting Direction	Right	Nut structure	1-fach	Circuit System	Tube Type
Axial End Type	Standard Shaft End Alterations Item	Nut Size	Standard

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Basic Attributes

Accuracy Grade
- C7
- C10
Clear
Screw Shaft O.D.(mm)
12

14
Clear
Lead(mm)
4

5

10
Clear
Axial Play
- 0.030 or Less
- 0.10 or Less
  - 0.10 or Less
- 0.05 or Less
Clear
Number of Circuits(Rows x Windings)
- 1 x 1.5
- 1 x 2.5
Clear
Shaft Overall Length L(mm)
[150-800/1mm Unit(s)]
Clear
Grease Type
- Standard
- Type G
- Type L
Clear
Shaft End Length F(mm)
15
[15-24/1mm Unit(s)]
Clear
Shaft Dia. P(Ø)
8
[5-8/1Ø Unit(s)]
Clear
Screw Shaft Surface Treatment
- LTBC Plating
- Not Provided
- Phosphate Coating
Clear
Shaft End Dimension (Fixed, Configurable)
- Configuration
- Stationary
Clear
Type
- BSRR1204
- BSRR1204G
- BSRR1204L
- BSRR1210
- BSRR1210G
- BSRR1210L
- BSRR1405
- BSRR1405G
- BSRR1405L
- BSRRK1204
- BSRRK1204G
- BSRRK1204L
- BSRRK1210
- BSRRK1210G
- BSRRK1210L
- BSRRK1405
- BSRRK1405G
- BSRRK1405L
- BSSR1204
- BSSR1204G
- BSSR1204L
- BSSR1210
- BSSR1210G
- BSSR1210L
- BSSR1405
- BSSR1405L
- BSSRK1204
- BSSRK1204G
- BSSRK1204L
- BSSRK1210
- BSSRK1210G
- BSSRK1210L
- BSSRK1405
- BSSRK1405G
- BSSRK1405L
- BSST1204
- BSST1204G
- BSST1204L
- BSSZ1204
- BSSZ1204G
- BSSZ1204L
- BSSZ1210
- BSSZ1210G
- BSSZ1210L
- BSSZ1405
- BSSZ1405G
- BSSZ1405L
- BSSZK1204
- BSSZK1204G
- BSSZK1204L
- BSSZK1210
- BSSZK1210G
- BSSZK1210L
- BSSZK1405
- BSSZK1405G
- BSSZK1405L
- ｃ
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Optional Attributes

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently Asked Questions (FAQ)

Question:
How do you mount a ball screw drive?: Answer:
A ball screw should be stored with a fixed bearing and a floating bearing. The fixed bearing should ideally be installed on the engine side or the drive side. Fixed bearing housings come already equipped with angular contact ball bearings to absorb axial forces. This combination makes ball screws an ideal candidate for positioning. However, a preloaded threaded drive should be selected for very high precision as it has very little axial play.
Question:
Why should a fixed and floating bearing be used?: Answer:
A fixed bearing housing is often used on the drive side. The floating bearing with housing, on the other hand, allows a small axial deviation and thus compensates for a change in length or a length tolerance. This prevents compression and bending of the ball screw and an imbalance through the length compensation. This may already occur by heating the spindle or application. Fixed and floating bearings are recommended in many rotary applications.
Question:
How does a ball screw work?: Answer:
A ball screw works similarly to a profile rail guide . In the nut of the ball screw, balls are in a closed ball circulation, which are guided to the spindle by the circular alignment. Thus, an unlimited stroke is theoretically possible, which, however, is limited by the length of the spindle. It is important to ensure that the nut of the ball screw is not removed from the spindle, because the balls can fall out as a result.
Question:
Why does the spindle oscillate in a ball screw drive?: Answer:
One possible cause for this could be that the ball screw is exposed to excessively high rotational speeds. The permissible rotational speed should not be higher than 80% of the critical speed. Here, attention should be paid not only to the visibly rotating components, but also to the rotational speed of the balls. Further information can be found in the ball screw driver selection as a PDF. Another possibility for the spindle to oscillate could be a compression of the spindle. Therefore, it is important to install a ball screw with a fixed bearing and a floating bearing so that these stresses can be compensated through a floating bearing. MISUMI offers this as ready-to-install bearing housings.
Question:
Is the ball screw nut removable?: Answer:
The ball screw nut or ball wrap nut should not be removed from the lead screw. There is a risk that the balls will fall out of the nut. This also means that the nut should not be extended over the threaded surface of the spindle. To remove the nut, you can work carefully with a transition shaft with the appropriate core diameter. However, MISUMI also offers an option [TAS] that provides a transition shaft with the ball screw drive. If a ball screw with reverse ball screw is required, the option [RLC] can be supplied with the ball screw nut installed in reverse.
Question:
Can you replace just the ball screw nut?: Answer:
A ball screw drive should always be replaced as one unit. If damage or wear has already occurred on the spindle, the accuracy of the ball screw drive can no longer be guaranteed. Therefore, it is always recommended replacing spindle and nut together. In addition, the ball screw nut should generally not be removed from the spindle. As a result, the balls that are necessary for the transmission of force may fall out.
Question:
How long does a ball screw lasts?: Answer:
How long a ball screw can withstand an application depends on many factors. Therefore, it is not possible to say generally how long a ball screw will last. When a ball screw should be replaced, it must be determined mathematically. In the following link, you will find the appropriate calculation formula for the lifetime available as a PDF.
Question:
How large is the axial play of a ball screw?: Answer:
The axial play varies depending on the precision class and size of the ball screw. You can find the appropriate axial play for different ball screws under the selection Ball Screws available as a PDF .
Question:
What must be considered when installing a ball screw?: Answer:
When installing a ball screw spindle, more must be taken into account than just ensuring that it is installed tension-free. There are a few things you should observe even before installation. You can view these as a PDF under Precautions.
Question:
Are the ball screws lubricated?: Answer:
The ball screws from MISUMI are pre-greased. Various lubricants are available for this purpose. Lithium-saponified lubricants are used as standard lubricants. In addition, MISUMI offers heat-resistant lubricants or lubricants suitable for cleanrooms. You can find further information under Installation and Maintenance available as a PDF.