BALL NUT SEM-E-C 50X20RX6,5-5

Manufacturer: Bosch Rexroth

Material #: R151257076

Model : SEM-E-C 50X20RX6,5-5

***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-C 50X20RX65-5 (R151257076) is an adjustable preload single nut ball screw assembly designed for precision linear motion applications. This high-quality component features a nominal diameter and a right-hand lead, which conforms to DIN standards, ensuring compatibility with a wide range of equipment. The SEM-E-C series nut has a flange type C mounting, which offers robust attachment possibilities. This ball screw nut is equipped with standard seals and axial clearance, maintaining the integrity of the system while allowing for slight adjustments to preload, thereby optimizing system rigidity and performance. The tolerance grade T is applicable for this model, indicating its precision level in accordance with the product overview for screws detailed in the General Technical Notes and Information provided by Bosch Rexroth. The SEM-E-C 50X20RX65-5 boasts an impressive dynamic load capacity and static load rating, validated exclusively for tolerance grades T3 and T5. For other tolerance grades, users are advised to reference the correction factor f_ac in the Technical Data section. The unit can operate within a temperature range of -10°C to +100°C, enduring temporary peaks up to 120°C as measured on the outer shell of the nut. Designed as a zero-clearance adjustable single nut within Bosch Rexroth's product group ID category B, this ball screw assembly supports maximum permissible linear speeds while maintaining stability and longevity under dynamic conditions. Its construction allows for continuous operation at elevated temperatures without compromising performance. Lastly, the SEM-E-C 50X20RX65-5 has a specific size designation (L dimension) and weight that aligns with its designated use cases. This model ensures precise control in linear motion systems where high reliability and accuracy are paramount.

$1,072.46 USD

More are expected on June 10, 2025

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Status: This product is temporarily out of stock.

Qty: Delivered as early as June 10, 2025 when ordered in

BALL NUT SEM-E-C 50X20RX6,5-5

Adjustable-preload single nut SEM-E-C, size 50 x 20R x 6.5 - 5

Adjustable-preload single nut SEM-E-C with standard seal and standard axial clearance
Nominal diameter d0 = 50
Lead P = 20 (right)
Ball diameter Dw = 6.5
Number of ball track turns i = 5

Unpacked Weight: 3.337 kg

Product overview

Mounting dimensions similar to DIN 69051, Part 5 flange type C
With seals
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	110
Size L with tolerance	132 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	25
Size D6	93
Size D1 f9	75
Size D1 min	74.941
Size L3	30
Size L9	97.5
Size L10	51
Size D1 max	74.969
Operating temperature	-10 °C ... +80 °C
Maximum permissible linear speed vmax (m/min)	60
Direction of lead	Right
Size L8	20
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	51
Static load rating C0	149700
Note: Maximum permissible speed vmax	See "Characteristic speed d₀• n" (see General Technical Notes and Information, "Technical Data" (Technical Notes), and "Critical speed n_cr" (see General Technical Notes and Information, "Project planning notes")
Nut type	SEM-E-C zero-clearance adjustable single nut
Productgroup ID	17
Screw drive version (drive type)	Ball screw assembly
Size D7	11
Hole pattern	BB1
Size Sx	5
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	90800
Size d1	48
Size L	132
Size d2	43.4
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	3.337
Nominal size	50 x 20R x 6,5 - 5

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)	0.2
16 x 10R x 3 - 3	11500 1)	12300 1)	60 2)	0.22
16 x 16R x 3 - 3	11200 1)	12000 1)	96 2)	0.29
20 x 5R x 3 - 4	17200 1)	21500 1)	30 2)	0.33
20 x 20R x 3,5 - 3	16000 1)	18800 1)	120 2)	0.56
25 x 5R x 3 - 4	19100 1)	27200 1)	30 2)	0.43
25 x 10R x 3 - 4	18800 1)	27000 1)	60 2)	0.54
25 x 25R x 3,5 - 3	17600 1)	23300 1)	150 2)	0.77
32 x 5R x 3,5 - 4	25900 1)	40000 1)	23 2)	0.74
32 x 10R x 3,969 - 5	38000 1)	58300 1)	47 2)	0.97
32 x 20R x 3,969 - 3	23600 1)	33700 1)	94 2)	1.04
32 x 32R x 3,969 - 3	23400 1)	34000 1)	150 2)	1.34
40 x 5R x 3,5 - 5	34900 1)	64100 1)	19 2)	1.25
40 x 10R x 6 - 4	60000 1)	86400 1)	38 2)	1.39
40 x 12R x 6 - 4	59900 1)	86200 1)	45 2)	1.47
40 x 20R x 6 - 3	45500 1)	62800 1)	75 2)	1.55
40 x 40R x 6 - 3	44400 1)	62300 1)	150 2)	2.69
50 x 5R x 3,5 - 5	38400 1)	81300 1)	15 2)	1.67
50 x 10R x 6 - 6	95600 1)	166500 1)	30 2)	2.46
50 x 12R x 6 - 6	95500 1)	166400 1)	36 2)	2.69
50 x 20R x 6,5 - 5	90800 1)	149700 1)	60 2)	3.08
50 x 40R x 6,5 - 3	55800 1)	85900 1)	120 2)	3.39
63 x 10R x 6 - 6	106600 1)	214300 1)	24 2)	2.83
63 x 20R x 6,5 - 5	100700 1)	190300 1)	48 2)	4.86
63 x 40R x 6,5 - 3	64100 1)	114100 1)	95 2)	5.36
80 x 10R x 6,5 - 6	130100 1)	291700 1)	19 2)	3.73
80 x 20R x 12,7 - 6	315200 1)	534200 1)	30 2)	13.5

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" (see General Technical Notes and Information "Technical Data" (Technical Notes), and "Critical Speed ncr" (see General Technical Notes and Information, "Project planning notes")

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 - 3
20 x 5R x 3 - 4
20 x 20R x 3,5 - 3
25 x 5R x 3 - 4
25 x 10R x 3 - 4
25 x 25R x 3,5 - 3
32 x 5R x 3,5 - 4
32 x 10R x 3,969 - 5
32 x 20R x 3,969 - 3
32 x 32R x 3,969 - 3
40 x 5R x 3,5 - 5
40 x 10R x 6 - 4
40 x 12R x 6 - 4
40 x 20R x 6 - 3
40 x 40R x 6 - 3
50 x 5R x 3,5 - 5
50 x 10R x 6 - 6
50 x 12R x 6 - 6
50 x 20R x 6,5 - 5
50 x 40R x 6,5 - 3
63 x 10R x 6 - 6
63 x 20R x 6,5 - 5
63 x 40R x 6,5 - 3
80 x 10R x 6,5 - 6
80 x 20R x 12,7 - 6

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)
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 (lube port machining: Flat surface L3 ≤ 15 mm, countersink L3 > 15 mm)
2)	Nut rework: Axial lube port

Dimensions

Size	D1 min	D1 max	d1	d2	D1	D5	Hole pattern	D6	D7	L	L3	L4	L5	L8	L9	L10	S 1)	Sx
d0 x P x Dw - i	D1 min	D1 max	d1	d2	f9	D5	Hole pattern	D6	D7	L	L3	L4	L5	L8	L9	L10	S 1)	Sx
d0 x P x Dw - i	mm	mm	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	48	BB2	38	5.5	38	15	10	11.5	7.1	44	11.5	M6	4
16 x 10R x 3 - 3	27.94	27.975								45		15	15	11		15
16 x 16R x 3 - 3	27.95	27.978								61		20	23	10		23
20 x 5R x 3 - 4	35.935	35.97	19	16.9	36	58		47	6.6	40		10	12.5	7.1	51	12.5
20 x 20R x 3,5 - 3	35.945	35.973	19	16.7	36	58		47		77	20	25	28.5	12.5	51	28.5
25 x 5R x 3 - 4	39.935	39.97	24	21.9	40	62		51		45		10	12.5	9.5	55	12.5
25 x 10R x 3 - 4	39.935	39.97		21.9						64		16	22	10		22
25 x 25R x 3,5 - 3	39.945	39.973		21.4						95	25	30	35	14		35
32 x 5R x 3,5 - 4	49.935	49.97	31	28.4	50	80		65	9	48	20	10	14	9.7	71	14
32 x 10R x 3,969 - 5	49.935	49.97		27.9						77		16	28.5	12.5		28.5
32 x 20R x 3,969 - 3	49.945	49.973								84		25	32			32
32 x 32R x 3,969 - 3	49.945	49.973								120		40	50			50
40 x 5R x 3,5 - 5	62.931	62.966	39	36.4	63	93	BB1	78		54	25	10	14.5	12	81.5	14.5	M8x1	5
40 x 10R x 6 - 4			38	33.8						70		16	22.5	11.8		22.5
40 x 12R x 6 - 4										75		25	25	12.5		25
40 x 20R x 6 - 3	62.941	62.969								88		25	31.5	16.5		31.5
40 x 40R x 6 - 3	62.941	62.969								142	40	45	51	25		51
50 x 5R x 3,5 - 5	74.931	74.966	49	46.4	75	110		93	11	54	25	10	14.5	12	97.5	14.5
50 x 10R x 6 - 6			48	43.8						90	30	16	30	14.1		30
50 x 12R x 6 - 6				43.8						105		25	37.5	15		37.5
50 x 20R x 6,5 - 5	74.941	74.969		43.4						132		25	51	20		51
50 x 40R x 6,5 - 3	74.941	74.969		43.4						149		45	59.5	18		59.5
63 x 10R x 6 - 6	89.926	89.961	61	56.8	90	125		108		90		16	30	14	110	30
63 x 20R x 6,5 - 5	94.936	94.964		56.4	95	135		115	13.5	132		25	51	20	117.5	51
63 x 40R x 6,5 - 3	94.936	94.964		56.4	95	135		115		149		45	59.5	18	117.5	59.5
80 x 10R x 6,5 - 6	104.926	104.961	78	73.3	105	145		125		95		16	32.5	14	127.5	32.5
80 x 20R x 12,7 - 6	124.931	124.959	76	67	125	165		145		170	50	25	60	24	147.5	60

1)	Lube port machining: Flat surface L3 ≤ 15 mm, countersink L3 > 15 mm

Legend

Symbol	Description	Unit
d0	Nominal diameter	mm
P	Lead (R = right-hand)
Dw	Ball diameter	mm
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 MGD

Steel nut housings MGD are designed for FEM-E-C, FDM-E-C, SEM-E-C and FED-E-B 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-C 50X20RX6,5-5

Manufacturer: Bosch Rexroth

Material #: R151257076

Model : SEM-E-C 50X20RX6,5-5

More are expected on June 10, 2025

Technical data for nuts

Operating conditions

Legend

Dimensions

Legend

Nut housing MGD

Nut housing MGD

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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