BOSCH REXROTH
R151217013

$443.35 USD

BOSCH REXROTH
Material:R151217013
Model:FEM-E-S20X20RX3,5-2

Quantity in stock: 0

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***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 FEM-E-S 20X20RX35-2 (R151217013) is a high-precision ball screw assembly designed for linear motion applications requiring smooth and accurate movement. This single nut with flange FEMES features a nominal diameter of 20 mm, a lead of 20 mm to the right, and ball diameter specifications tailored to facilitate efficient load handling and reduced friction. The product is engineered with a number of ball track turns that comply with Rexroth connection dimensions, ensuring compatibility and ease of integration within various systems. Equipped with standard seals to protect against contaminants, the FEM-E-S 20X20RX35-2 offers reliable performance in diverse operating conditions. It also comes in different preload classes (C0 to C3) to accommodate varying application requirements and precision demands. The tolerance grade is set at T3 as per the product overview for screws, which is indicative of its manufacturing precision and suitability for high-performance tasks. This ball screw assembly operates within a temperature range from -10°C to +80°C, ensuring stability across various environments. Its dynamic load capacity is optimized for tolerance grades T3 and T4; however, users should consider the correction factor f_a_c when dealing with other tolerance grades as specified in the general technical notes. With a static load rating C0 and capability for maximum permissible linear speeds (v_max), this Bosch Rexroth screw drive nut exhibits robustness under static loads and efficiency during high-speed operations. The product's weight is kept minimal without compromising strength or durability. Designed for easy mounting through its hole pattern BB, the Bosch Rexroth FEM-E-S 20X20RX35-2 ensures quick installation while maintaining alignment accuracy. This makes it an ideal component in applications where precise linear motion is essential, such as in CNC machinery, robotics, and automation systems where reliability and performance are non-negotiable.

Single nut with flange FEM-E-S, size 20 x 20R x 3.5 - 2

Single nut with flange FEM-E-S with standard seal and standard axial clearance
Nominal diameter d0 = 20
Lead P = 20 (right)
Ball diameter Dw = 3.5
Number of ball track turns i = 2

Unpacked Weight: 0.706 kg

Product overview

Rexroth connection dimensions
With seals
With left-hand version in some cases
Preload class: C0, C00, C1, C2, C3
Tolerance grade: T3 (for sizes as per the product overview for screws, see general technical notes and information, “Product description”), T5, T7, T9
Rexroth connecting dimensions: Rexroth mounting dimensions
With seals

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Manual	Download Manual
Manual	Download Manual
Manual	Download Manual
Manual	Download Manual
Manual	Download Manual

Size D5	63
Size L with tolerance	57 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	A
Minimum operating temperature	-10
Size L4	18.5
Size D6	50
Size L3	20
Operating temperature	-10 °C ... +80 °C
Maximum permissible linear speed vmax (m/min)	120
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	18.5
Static load rating C0	12100
Size D1 g6	38
Note: Maximum permissible speed vmax	See "Characteristic speed d₀• n" (section Technical notes) and "Critical speed n_cr" (section Calculation and examples)
Nut type	FEM-E-S single nut with flange
Productgroup ID	17
Screw drive version (drive type)	Ball screw assembly
Size D7	6.6
Angle φ	30
Hole pattern	BB4
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	10900
Size d1	19
Size L	57
Size d2	16.7
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	0.706
Nominal size	20 x 20R x 3,5 - 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)	0.39
20 x 5R x 3 - 4	17200 1)	21500 1)	30 2)	0.28
20 x 10R x 3 - 4	16900 1)	21300 1)	60 2)	0.36
20 x 20R x 3,5 - 2	10900 1)	12100 1)	120 2)	0.6
25 x 5R x 3 - 4	19100 1)	27200 1)	30 2)	0.35
25 x 10R x 3 - 4	18800 1)	27000 1)	60 2)	0.44
25 x 25R x 3,5 - 2	12100 1)	15100 1)	150 2)	1.09
32 x 5R x 3,5 - 4	25900 1)	40000 1)	23 2)	0.54
32 x 10R x 3,969 - 5	38000 1)	58300 1)	47 2)	0.72
32 x 20R x 3,969 - 2	16200 1)	21800 1)	94 2)	1.02
32 x 32R x 3,969 - 2	16100 1)	22000 1)	150 2)	1.4
40 x 5R x 3,5 - 5	34900 1)	64100 1)	19 2)	0.71
40 x 10R x 6 - 4	60000 1)	86400 1)	38 2)	1.29
40 x 10R x 6 - 6	86500 1)	132200 1)	38 2)	1.59
40 x 20R x 6 - 3	45500 1)	62800 1)	75 2)	1.54
40 x 40R x 6 - 2	30600 1)	40300 1)	150 2)	3.59
50 x 5R x 3,5 - 5	38400 1)	81300 1)	15 2)	1.02
50 x 10R x 6 - 6	95600 1)	166500 1)	30 2)	2.02
50 x 16R x 6 - 6	95300 1)	166000 1)	48 2)	2.58
50 x 20R x 6,5 - 3	57500 1)	87900 1)	60 2)	3.4
50 x 40R x 6,5 - 2	38500 1)	55800 1)	120 2)	3.87
63 x 10R x 6 - 6	106600 1)	214300 1)	24 2)	2.62
63 x 20R x 6,5 - 3	63800 1)	112100 1)	48 2)	3.71
63 x 40R x 6,5 - 2	44300 1)	74300 1)	95 2)	4.21
80 x 10R x 6,5 - 6	130100 1)	291700 1)	19 2)	3.78
80 x 20R x 12,7 - 6	315200 1)	534200 1)	30 2)	11
16 x 5L x 3 - 4	14800 1)	16100 1)		0.24
20 x 5L x 3 - 4	17200 1)	21500 1)		0.28
25 x 5L x 3 - 4	19100 1)	27200 1)		0.35
32 x 5L x 3,5 - 4	25900 1)	40000 1)	23 2)	0.54
40 x 5L x 3,5 - 5	34900 1)	64100 1)	19 2)	0.71
40 x 10L x 6 - 4	60000 1)	86400 1)	38 2)	1.29

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 10R 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 10R x 6 - 6
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 16R 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

technical illustration-R151217013-Single nut with flange FEM-E-S, size 20 x 20R x 3.5 - 2

1)	Lube port at flange center (lube port machining: Flat surface L3 ≤ 15 mm, countersink L3 > 15 mm)
2)	Nut rework: Axial lube port

Dimensions

Size	d1	d2	D1	D5	Hole pattern	D6	D7	Design type	L	L3	L4	L5	L10	S 1)	Sx	φ
d0 x P x Dw - i	d1	d2	g6	D5	Hole pattern	D6	D7	Design type	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	°
16 x 5R x 3 - 4	15	12.9	28	53	BB3	40	6.6	BF1	38	12	10	-	26	M6	4	315
16 x 10R x 3 - 3			28	53	BB3	40		BF1	45	12	16	-	33			315
16 x 16R x 3 - 2			33	58	BB4	45		BF2	45	15	15	15	-			30
20 x 5R x 3 - 4	19	16.9						BF1	40	12	10	-	28
20 x 10R x 3 - 4		16.9						BF1	60	12	16	-	48
20 x 20R x 3,5 - 2		16.7	38	63		50		BF2	57	20	18.5	18.5	-
25 x 5R x 3 - 4	24	21.9						BF1	45	12	10	-	33
25 x 10R x 3 - 4		21.9						BF1	64	12	16	-	52
25 x 25R x 3,5 - 2		21.4	48	73		60		BF2	70	25	22.5	22.5	-			18
32 x 5R x 3,5 - 4	31	28.4						BF1	48	13	10	-	35			30
32 x 10R x 3,969 - 5		27.9							77	13	16		64
32 x 20R x 3,969 - 2			56	80		68			64	15	25		49
32 x 32R x 3,969 - 2								BF2	88	20	34	34	-
40 x 5R x 3,5 - 5	39	36.4						BF1	54	15	10	-	39	M8x1	5
40 x 10R x 6 - 4	38	33.8	63	95		78	9		70		16		55
40 x 10R x 6 - 6									90		16		75
40 x 20R x 6 - 3									88		25		73
40 x 40R x 6 - 2			72	110		90	11	BF2	102	40	31	31	-			19
50 x 5R x 3,5 - 5	49	46.4	68	98		82	9	BF1	54	15	10	-	39			30
50 x 10R x 6 - 6	48	43.8	72	110		90	11		90	18	16		72
50 x 16R x 6 - 6		43.8	72	110		90			128	18	25		110
50 x 20R x 6,5 - 3		43.4	85	125		105			92	22	25		70
50 x 40R x 6,5 - 2		43.4							109		45		87
63 x 10R x 6 - 6	61	56.8							90		16		68
63 x 20R x 6,5 - 3		56.4	95	140		118	14		92		25		70
63 x 40R x 6,5 - 2		56.4	95	140		118			109		45		87
80 x 10R x 6,5 - 6	78	73.3	105	150		125			95		16		73
80 x 20R x 12,7 - 6	76	67	125	180	BB5	152	18		170	25	25		145			22.5
16 x 5L x 3 - 4	15	12.9	28	53	BB3	40	6.6		38	12	10		26	M6		45
20 x 5L x 3 - 4	19	16.9	33	58	BB4	45			40				28			30
25 x 5L x 3 - 4	24	21.9	38	63		50			45				33
32 x 5L x 3,5 - 4	31	28.4	48	73		60			48	13			35
40 x 5L x 3,5 - 5	39	36.4	56	80		68			54	15			39	M8x1
40 x 10L x 6 - 4	38	33.8	63	95		78	9		70	15	16		55	M8x1

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

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

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