BALL NUT SEM-E-S 32X20RX3,969-2

Manufacturer: Bosch Rexroth

Material #: R151237014

Model : SEM-E-S 32X20RX3,969-2

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth SEM-E-S 32X20RX3969-2 (R151237014) is a high-precision ball screw assembly designed for motion control applications requiring meticulous linear movement. This adjustable preload single nut SEMES model is engineered with a nominal diameter and right-hand lead direction, ensuring compatibility with a variety of machine designs. The SEM-E-S 32X20RX3969-2 features standard seals and standard axial clearance, optimizing its performance for different operational conditions. Constructed to deliver exceptional accuracy, this screw drive nut boasts a tolerance grade of T, aligning with the stringent specifications outlined in the product overview for screws. It is equipped to handle dynamic load capacities as specified for tolerance grades T and T, with additional consideration needed for other grades using the correction factor detailed in the technical notes. The nut type is a SEMES zero-clearance adjustable single nut, which allows for precise adjustments to eliminate backlash, enhancing the accuracy and lifespan of the assembly. This model operates efficiently within a temperature range of -10°C to +80°C and can withstand maximum permissible linear speeds while maintaining its structural integrity. With its robust design, this ball screw assembly can sustain continuous operation at temperatures up to 80°C and temporary peaks up to 100°C when measured on the outer shell of the nut. The dynamic load capacity is an essential feature that complements its size L designation. Furthermore, this unit comes with Rexroth connection dimensions and offers compatibility with left-hand versions in certain scenarios. The Bosch Rexroth SEM-E-S 32X20RX3969-2 is an integral component in systems where precision linear movement is critical. Its reliability and adaptability make it suitable for various applications that demand high levels of accuracy and efficiency in their screw drive mechanisms.

$744.13 USD

More are expected on May 29, 2025

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Status: This product is temporarily out of stock.

Qty: Delivered as early as May 29, 2025 when ordered in

BALL NUT SEM-E-S 32X20RX3,969-2

Adjustable-preload single nut SEM-E-S, size 32 x 20R x 3.969 - 2

Adjustable-preload single nut SEM-E-S with standard seal and standard axial clearance
Nominal diameter d0 = 32
Lead P = 20 (right)
Ball diameter Dw = 3.969
Number of ball track turns i = 2

Unpacked Weight: 1.220 kg

Product overview

Rexroth connection dimensions
With seals
With left-hand version in some cases
Adjustable preload
Tolerance grade: T3 (for sizes as per the product overview for screws, see General Technical Notes and Information "Product description"), T5, T7

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3D CAD	Download 3D CAD
3D CAD	Download 3D CAD
Manual	Download Manual
Manual	Download Manual
Manual	Download Manual
Manual	Download Manual
Manual	Download Manual

Size D5	80
Size L with tolerance	64 mm
Bearing temperature max	+80
Series	Standard series
Bearing temperature min	-15
Nut or screw	Screw drive nut
Maximum operating temperature	+80
Footnote dynamic load capacity C	The load capacities are valid for tolerance grade T3 and T5 only. For other tolerance grades, please take into account the correction factor f_ac (see General Technical Notes and Information "Technical Data", Technical Notes).
Bearing temperature	-15 °C ... +80 °C
Category	B
Minimum operating temperature	-10
Size L4	22
Size D6	68
Size D1 f9	56
Size D1 min	55.941
Size L3	20
Size L10	22
Size D1 max	55.969
Operating temperature	-10 °C ... +80 °C
Maximum permissible linear speed vmax (m/min)	94
Direction of lead	Right
Lead	20
Footnote static load capacity C0	The load capacities are valid for tolerance grade T3 and T5 only. For other tolerance grades, please take into account the correction factor f_ac (see General Technical Notes and Information "Technical Data", Technical Notes).
Size L5	22
Static load rating C0	21800
Note: Maximum permissible speed vmax	See "Characteristic speed d₀• n" (section Technical notes) and "Critical speed n_cr" (section Calculation and examples)
Nut type	SEM-E-S zero-clearance adjustable single nut
Productgroup ID	17
Screw drive version (drive type)	Ball screw assembly
Size D7	6.6
Angle φ	60
Hole pattern	BB7
Size Sx	4
Footnote permissible operating temperature (min...max)	Ball screw assemblies permit operation at continuous temperatures of up to 80 °C with temporary peaks of 100 °C, measurements taken on the outer shell of the nut in each case.
Dynamic load capacity C	16200
Size d1	31
Size L	64
Size d2	27.9
Footnote operating temperature max.	Ball screw assemblies permit operation at continuous temperatures of up to 80°C with temporary peaks of 100°C, measurements taken on the outer shell of the nut in each case.
Weight	1.220
Nominal size	32 x 20R x 3,969 - 2

Technical data for nuts

Size	C	C0	vmax	Mass
d0 x P x Dw - i	N	N	m/min	kg
16 x 5R x 3 - 4	14800 1)	16100 1)	30 2)	0.24
16 x 10R x 3 - 3	11500 1)	12300 1)	60 2)	0.25
16 x 16R x 3 - 2	7560 1)	7600 1)	96 2)	0.42
20 x 5R x 3 - 4	17200 1)	21500 1)	30 2)	0.31
20 x 20R x 3,5 - 2	10900 1)	12100 1)	120 2)	0.63
25 x 5R x 3 - 4	19100 1)	27200 1)	30 2)	0.44
25 x 10R x 3 - 4	18800 1)	27000 1)	60 2)	0.53
25 x 25R x 3,5 - 2	12100 1)	15100 1)	150 2)	1.13
32 x 5R x 3,5 - 4	25900 1)	40000 1)	23 2)	0.64
32 x 10R x 3,969 - 5	38000 1)	58300 1)	47 2)	0.87
32 x 20R x 3,969 - 2	16200 1)	21800 1)	94 2)	1.14
32 x 32R x 3,969 - 2	16100 1)	22000 1)	150 2)	1.44
40 x 5R x 3,5 - 5	34900 1)	64100 1)	19 2)	0.87
40 x 10R x 6 - 4	60000 1)	86400 1)	38 2)	1.53
40 x 20R x 6 - 3	45500 1)	62800 1)	75 2)	1.77
40 x 40R x 6 - 2	30600 1)	40300 1)	150 2)	3.77
50 x 5R x 3,5 - 5	38400 1)	81300 1)	15 2)	1.23
50 x 10R x 6 - 6	95600 1)	166500 1)	30 2)	2.44
50 x 20R x 6,5 - 3	57500 1)	87900 1)	60 2)	3.94
50 x 40R x 6,5 - 2	38500 1)	55800 1)	120 2)	4.42
63 x 10R x 6 - 6	106600 1)	214300 1)	24 2)	2.94
63 x 20R x 6,5 - 3	63800 1)	112100 1)	48 2)	4.45
63 x 40R x 6,5 - 2	44300 1)	74300 1)	95 2)	4.95
80 x 10R x 6,5 - 6	130100 1)	291700 1)	19 2)	4.2
80 x 20R x 12,7 - 6	315200 1)	534200 1)	30 2)	13.3
16 x 5L x 3 - 4	14800 1)	16100 1)		0.24
20 x 5L x 3 - 4	17200 1)	21500 1)		0.31
25 x 5L x 3 - 4	19100 1)	27200 1)		0.44
32 x 5L x 3,5 - 4	25900 1)	40000 1)	23 2)	0.64
40 x 5L x 3,5 - 5	34900 1)	64100 1)	19 2)	0.87
40 x 10L x 6 - 4	60000 1)	86400 1)	38 2)	1.53

1)	The load ratings are valid for tolerance grades T3 and T5 only. For other tolerance grades, please take into account the correction factor fac (see General Technical Notes and Information "Technical Data", Technical Notes).
2)	See "characteristic speed d0 • n" (section Technical notes) and "critical speed n"cr" (section Calculation and examples)

Operating conditions

Size	Admissible operating temperature (min ... max) 1)	Admissible storage temperature (min ... max)
d0 x P x Dw - i	Admissible operating temperature (min ... max) 1)	Admissible storage temperature (min ... max)
16 x 5R x 3 - 4	-10 °C ... +80 °C	-15 °C ... +80 °C
16 x 10R x 3 - 3
16 x 16R x 3 - 2
20 x 5R x 3 - 4
20 x 20R x 3,5 - 2
25 x 5R x 3 - 4
25 x 10R x 3 - 4
25 x 25R x 3,5 - 2
32 x 5R x 3,5 - 4
32 x 10R x 3,969 - 5
32 x 20R x 3,969 - 2
32 x 32R x 3,969 - 2
40 x 5R x 3,5 - 5
40 x 10R x 6 - 4
40 x 20R x 6 - 3
40 x 40R x 6 - 2
50 x 5R x 3,5 - 5
50 x 10R x 6 - 6
50 x 20R x 6,5 - 3
50 x 40R x 6,5 - 2
63 x 10R x 6 - 6
63 x 20R x 6,5 - 3
63 x 40R x 6,5 - 2
80 x 10R x 6,5 - 6
80 x 20R x 12,7 - 6
16 x 5L x 3 - 4
20 x 5L x 3 - 4
25 x 5L x 3 - 4
32 x 5L x 3,5 - 4
40 x 5L x 3,5 - 5
40 x 10L x 6 - 4

1)	Ball screw assemblies are suitable for continuous operation at temperatures up to 80 °C with temporary peaks of 100 °C (measurements taken on the outer shell of the nut).

Legend

Symbol	Description	Unit
d0	Nominal diameter	mm
P	Lead (R = right-hand, L = left-hand)
Dw	Ball diameter	mm
i	Number of ball track turns
C	Dynamic load capacity	N
C0	Static load capacity	N
vmax	Maximum permissible speed	m/min

Technical notes

1)	Lube port at flange center (lube port machining: Flat surface L3 ≤ 15 mm, countersink L3 > 15 mm; for size 8 x 2.5 a DIN 3405 funnel-type lube nipple is provided.)
2)	right
3)	left
4)	Nut rework: Axial lube port

Dimensions

Size	D1 min	D1 max	d1	d2	D1	D5	Hole pattern	D6	D7	L	L3	L4	L5	L10	S 1)	Sx	φ
d0 x P x Dw - i	D1 min	D1 max	d1	d2	f9	D5	Hole pattern	D6	D7	L	L3	L4	L5	L10	S 1)	Sx	φ
d0 x P x Dw - i	mm	mm	mm	mm	mm	mm		mm	mm	mm	mm	mm	mm	mm	mm	mm	°
16 x 5R x 3 - 4	27.94	27.975	15	12.9	28	53	BB7	40	6.6	38	15	10	11.5	11.5	M6	4	53
16 x 10R x 3 - 3	27.94	27.975			28	53		40		45		15	15	15			180
16 x 16R x 3 - 2	32.945	32.973			33	58		45		45		15	15	15			50
20 x 5R x 3 - 4	32.935	32.97	19	16.9	33	58		45		40		10	12.5	12.5			56
20 x 20R x 3,5 - 2	37.945	37.973	19	16.7	38	63		50		57	20	18.5	18.5	18.5			60
25 x 5R x 3 - 4	37.935	37.97	24	21.9						45		10	12.5	12.5
25 x 10R x 3 - 4	37.935	37.97		21.9						64		16	22	22
25 x 25R x 3,5 - 2	47.945	47.973		21.4	48	73		60		70	25	22.5	22.5	22.5			48
32 x 5R x 3,5 - 4	47.935	47.97	31	28.4						48	20	10	14	14			60
32 x 10R x 3,969 - 5	47.935	47.97		27.9						77		16	28.5	28.5			168
32 x 20R x 3,969 - 2	55.941	55.969			56	80		68		64		22	22	22			60
32 x 32R x 3,969 - 2	55.941	55.969								88		34	34	34			60
40 x 5R x 3,5 - 5	55.931	55.966	39	36.4						54		10	17	17	M8x1	5	65
40 x 10R x 6 - 4	62.931	62.966	38	33.8	63	95		78	9	70	25	16	22.5	22.5			57
40 x 20R x 6 - 3	62.941	62.969			63	95		78	9	88	25	25	31.5	31.5			180
40 x 40R x 6 - 2	71.941	71.969			72	110		90	11	102	40	31	31	31			49
50 x 5R x 3,5 - 5	67.931	67.966	49	46.4	68	98		82	9	54	25	10	14.5	14.5			67
50 x 10R x 6 - 6	71.931	71.966	48	43.8	72	110		90	11	90	30	16	30	30			61
50 x 20R x 6,5 - 3	84.936	84.964		43.3	85	125		105		92		25	31	31			180
50 x 40R x 6,5 - 2	84.936	84.964		43.3						109		39.5	39.5	39.5			60
63 x 10R x 6 - 6	84.926	84.961	61	56.8						90		16	30	30			65
63 x 20R x 6,5 - 3	94.936	94.964		56.3	95	140		118	14	92		25	31	31			190
63 x 40R x 6,5 - 2	94.936	94.964		56.3	95	140		118		109		39.5	39.5	39.5			70
80 x 10R x 6,5 - 6	104.926	104.961	78	73.3	105	150		125		95		16	32.5	32.5			67
80 x 20R x 12,7 - 6	124.931	124.959	76	67	125	180		152	18	170	50	25	60	60			60
16 x 5L x 3 - 4	27.94	27.975	15	12.9	28	53		40	6.6	38	15	10	11.5	11.5	M6		53
20 x 5L x 3 - 4	32.935	32.97	19	16.9	33	58		45		40	15		12.5	12.5			56
25 x 5L x 3 - 4	37.935	37.97	24	21.9	38	63		50		45	20		12.5	12.5			60
32 x 5L x 3,5 - 4	47.935	47.97	31	28.4	48	73		60		48			14	14			59
40 x 5L x 3,5 - 5	55.931	55.966	39	36.4	56	80		68		54			17	17	M8x1		65
40 x 10L x 6 - 4	62.931	62.966	38	33.8	63	95		78	9	70	25	16	22.5	22.5	M8x1		57

1)	Lube port machining: Flat surface L3 ≤ 15 mm, countersink L3 > 15 mm; for size 8 x 2.5 a DIN 3405 funnel-type lube nipple is provided.

Legend

Symbol	Description
d0	Nominal diameter
P	Lead (R = right-hand, L = left-hand)
Dw	Ball diameter
i	Number of ball track turns

Calculation

Installation

Attention: When setting up applications, do not allow components to collide with the front lube unit.

Lubrication

Nut housing MGS

Steel nut housings MGS are designed for FEM-E-S, FDM-E-S, FEP-E-S and SEM-E-S nuts.

Catalog

Service

CAD data

Directives and standards

Required and supplementary documentation

For further instructions and information, please refer to the documentation for this product.

You can find PDF files of these documents on the Internet at www.boschrexroth.com/mediadirectory.

If you are unsure about using this product, please contact Bosch Rexroth.

Notes

BALL NUT SEM-E-S 32X20RX3,969-2

Manufacturer: Bosch Rexroth

Material #: R151237014

Model : SEM-E-S 32X20RX3,969-2

More are expected on May 29, 2025

Technical data for nuts

Operating conditions

Legend

Dimensions

Legend

Nut housing MGS

Nut housing MGS

Front lube unit – ball screw assembly

Front lube unit – ball screw assembly

Arrestor nut

Arrestor nut

Required and supplementary documentation

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Information

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