LUBRICATING UNIT 25

Manufacturer: Bosch Rexroth

Material #: R161922600

Model : LUBRICATING UNIT 25

***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 LUBRICATING UNIT 25 (R161922600) is a state-of-the-art lubrication system designed to enhance the performance and longevity of ball rail systems. This front lube unit is specifically engineered for size H and K profiled rail systems, ensuring that ball runner blocks are optimally lubricated for distances up to 10,000 km without the need for relubrication. The unit is characterized by its low lubricant loss and reduced oil consumption, eliminating the need for complex lubrication lines. Equipped with a special plastic construction, the front lube unit can be easily refilled through a lube nipple located on its endface or side. It supports an operating temperature range of -10°C to +100°C and has an initial filling oil quantity requirement of 0.2 cm³. The R161922600 comes pre-filled with Mobil SHC 100 oil, allowing for immediate use after the initial greasing of the ball runner block. The innovative design includes seals and an oil tank that ensure precise lubricant distribution where it's most needed—on the running tracks and top surface of the ball guide rail. This focused application contributes to its efficiency in maintaining optimal function over extended periods. With a nominal size weight of 0.5 kg, this accessory for profiled rail systems is not only effective but also lightweight, adding minimal mass to the overall assembly. The front lube unit's dimensions are compatible with size E profiled rail systems as well, providing versatility across various applications within Bosch Rexroth's linear guide offerings. This product represents Bosch Rexroth's commitment to providing high-quality accessories that improve system performance while reducing maintenance requirements for users in a wide range of applications where precision linear motion is critical.

$31.94 USD

More are expected on February 4, 2025

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Status: This product is temporarily out of stock.

Qty: Delivered as early as February 4, 2025 when ordered in

LUBRICATING UNIT 25

Front lube unit (KSF - FN and SN) - 25

Front lube unit for ball rail systems (FN and SN)
Size 25

Unpacked Weight: 0.0482 kg

No lubrication lines Front lube unit can be refilled using the lube nipple on the end-face or at the side. Lube port on the end-face of the front lube unit is suitable for lubricating the ball runner block with grease.

Possible travel distance with front lube units

Previous travel distance s

A With oil lubrication to 500 km B With grease lubrication to 1000 km

Possible travel distance s

C With front lube units to 10,000 km

Size		15	20	25	30	35	45	55	65
possible travel distance s with front lube units	km	10000						1500	1000

Compare oil consumption for size 25

Front lube units	Amount of lubricant oil per lubrication cycle	Travel distance s	Lubricant oil consumption absolute	Lubricant oil consumption in comparison
Front lube units	cm³	km	cm³/km	%
without	1,2	20	0,06	100,00
with	5,2	5000	0,00104	1,73

Lubricant distribution

Due to the special lubricant distribution construction, lubrication primarily takes place where it is needed: directly on the running tracks and the top surface of the Ball Guide Rail.

1 Top surface of the ball guide rail

2 Running tracks of the ball bearing guide

3 Oil tank

4 Seals

Front lube unit R1619 2. 00

Material:

special plastic

The front lube units R1619 .2. 00 are already filled with oil (Mobil SHC 639) and can be mounted after basic lubrication of the Ball Runner Block.

Front lube unit R1619 2. 10

Material:

special plastic

The front lube units R1619 2. 10 are left empty at the factory.

For a travel distance of up to 25,000 km without re-lubrication
Ball runner block only requires initial lubrication with grease
Front lube units on both sides of the ball runner block
Low lubricant loss
Reduced oil consumption
No lubrication lines
Front lube unit can be refilled using the lube nipple on the end-face or at the side.
Lube connection on the end-face of the front lube unit is suitable for lubricating the ball runner block with grease.

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Size H (profiled rail system)	33
Size K2 (profiled rail systems)	5
Oil quantity	2.5
Productgroup ID	17
Size K4 (profiled rail systems)	4.1
Product information	For ball runner blocks F.N (flange ... low) and S.N. (slimline ... low)
Size K3 (profiled rail systems)	4.1
Maximum operating temperature	+60
Size B3	13
Size H3	26.3
Possible travel distance s with front lube units	25000
Operating temperature	+60 °C
Tightening torque	0.6
Size E8 (profiled rail systems)	38.3
Height of runner block with guide rail	33
Oil quantity for initial filling of a front lube unit without oil	2.4
Linear guide type	Accessories for profiled rail systems
Size E9 (profiled rail systems)	8.5
Size A4 (profiled rail system)	47
Accessories for profiled rail systems	Lubrication
Weight	0.0482
Nominal size	25

General technical data

Size	Part number	Oil	maximum operating temperature	Mass
		cm³	°C	g
15	R161912500	1	+ 60	15
20	R161982500	2.2		20
20	R161982600 1)	1.8		20
25	R161922500	2.6		25
25	R161922600 1)	2.5		25
30	R161972500	3.85		35
35	R161932500	5.7		50
45	R161942500	9.6		70
55	R161952500	14.5		90
65	R161962500	30		130

1)	For Ball Runner Blocks F.N (flanged ... low profile) and S.N (slimline ... low profile)

a)	Size 65

Dimensions

Size		15	20		25		30	35	45	55	65
Part number		R161912500	R161982500	R161982600 1)	R161922500	R161922600 1)	R161972500	R161932500	R161942500	R161952500	R161962500
A4	mm	31.8	43	41	47		58.8	69	84	99	124.2
B3	mm	11.5	12.5		13		14.5	16	17	18	19
E8	mm	24.55	32.5	30.5	38.3		48.4	58	69.8	80	76
E8.1	mm	-									100
E9	mm	6.7 2)	7.3 2)	5.6 2)	11.5 2)	8.5 2)	14.6 2)	17.35 2)	20.9 2)	22.3 2)	11 2)
E9	mm	10.7 2) 3)	-		15.5 2) 3)	-	17.6 2) 3)	24.35 2) 3)	30.9 2) 3)	32.3 2) 3)	-
E9.1	mm	-									53.5 2)
H	mm	24	30	28	36	33	42	48	60	70	90
H 3)	mm	28	-		40	-	45	55	70	80	-
H3 2)	mm	19.4	24.9	22.9	29.3	26.3	35.05	39.85	49.8	57.05	75.7
H3 2) 3)	mm	23.4	-		33.3	-	38.05	46.85	59.8	67.05	-
K2	mm	5		-	5		6		7	8
K3 2)	mm	3.35	3.7	3.1	5.5	4.1	6.05	6.9	8.2	8.9	16
K3 2) 3)	mm	7.35	-		9.5	-	9.05	13.9	18.2	18.9	-
K4 2)	mm	3.35	3.7	3.1	5.5	4.1	6.05	6.9	8.2	8.9	16
K4 2) 3)	mm	7.35	-		9.5	-	9.05	13.9	18.2	18.9	-
S12		M3		-	M6	M3	M6				M8
S13		M3			M6	M3	M6				M8

1)	For Ball Runner Blocks F.N (flanged ... low profile) and S.N (slimline ... low profile)
2)	Based on the mounting face of the ball runner block
3)	For ball runner blocks S.H (slimline ... high)

Prior to assembling the front lube units, initial lubrication of the Ball Runner Blocks with grease lubricant is required! See Ball Rail Systems - General technical notes and information, chapter "Maintenance".

Assembly of front lube units – note for mounting

The parts required for mounting are included (coated screws, seal and lube nipple).

In each case, mount a front lube unit (Picture, Pos.3) on each side of the Ball Runner Block!

Do not pull the Ball Runner Block out of the Ball Guide Rail!

Ball Runner Block up to size 45:

The enclosed lubrication pin (2) must be installed between the lube plate and the Ball Runner Block! (It contains a lube port.)

Remove the set screws (1). Screw in lubrication pin (2). Slide on front lube units (3). Insert O-rings (5) between Ball Runner Block and front lube units. Tighten screws (4) with tightening torque MA Tighten according to the table (see below).

Ball Runner Block from size 55:

Slide on front lube units (3). Remove set screws (1) and insert O-rings (5) between Ball Runner Block and front lube units. Tighten screws (4) with tightening torque MA Tighten according to the table (see below).

Maximum tightening torque MA

Size	Pos. 4	Tightening torque MA in Nm
15	M2,5 x 12	0,3
20	M3 x 14	0,6
25	M3 x 14	0,6
30	M3 x 14	1,2
35	M3 x 16	1,2
45	M4 x 18	1,6
55	M5 x 18	2,0
65	M4 x 20	1,6

Initial filling of a front lube unit without oil

Remove set screw from the lube port (Fig. 1, item 1) and keep for later use. Tighten lube nipple (2). Lay front lube unit (3) down flat, fill with oil quantity according to table (see below), leave unused for approximately 36 hours. Check whether the lubricant insert is fully soaked with oil. Add oil if necessary. Remove lube nipple. Screw in set screw For size 20 Low: Place front lube units in 10 mm-deep oil for about 36 hours (see Fig. 2).

Fig. 1

Fig. 2

Recommended lubricating oil for initial filling:

Mobil SHC 639 (viscosity 1000 mm2/s at 40 °C)

If any oil other than the one specified is used, check the compatibility of lubricants and observe travel distance!

Size	Oil quantity for initial filling of a front lube unit without oil in cm3
15	0,90
20	2,00
25	2,40
30	3,85
35	5,70
45	9,60
55	14,50
65	30,00

Relubrication of the front lube units

Once the relubrication interval has been reached according to the diagram (see below), apply the relubrication quantity shown in the table "Oil quantity for initial filling of a front lube unit without oil in cm3" (see chapter "Commissioning").

Relubrication is possible via the lateral lube port. The front lube unit size 20 Low is not refillable via the lube port (see chapter "Commissioning", Fig. 2).

Note

After no more than 3 years Rexroth recommends replacing the front lube units and re-lubricating the Ball Runner Block prior to assembly of the new front lube unit.

Relubrication of the Ball Runner Block

Under clean operating conditions, the Ball Runner Block end faces can be re-lubricated with grease (Dynalub 510).

Relubrication of the Ball Runner Block with grease lubricant see section on lubrication.

Attention:

If other lubricants are used, this may lead to a reduction in lubrication intervals, performance losses with short-stroke applications and load capacities. Possible chemical interactions between the plastic materials, lubricants and preservative oils must also be taken into account. The recommended lubrication intervals depend on environmental factors, load and load type. Examples of environmental factors include swarf, mineral abrasion (or similar), solvent and temperature. Examples of loads and stress types are oscillations, shocks and tilting. The manufacturer is not familiar with the operating conditions. Only the user's own trials and accurate monitoring can yield safety across lubrication intervals. No water-based coolant/lubricant is permitted on the Ball Runner Blocks and Ball Guide Rails!

Load-dependent lubrication intervals for Ball Runner Blocks with front lube units

This applies for the following conditions:

Ball Runner Block lubricants: Dynalub 510 (NLGI 2 grease) or, alternatively, Castrol Longtime PD 2 (NLGI 2 grease) Front lube unit lubricants: Mobil SHC 639 (synthetic oil) Maximum speed: vmax. = 2 m/s No exposure to media Standard seals (SS) Ambient temperature: T = 20 – 30 °C

Definition Fcomb/C

The load ratio Fcomb/C describes the quotient form the equivalent dynamic load with combined load on bearing Fcomb (when considering the internal pre-tensioning force Fpr) and the dynamic load rating C.

a) Size 15, 20, 25, 30, 35, 45

b) Size 55:

c) Size 65

Legend

Symbol	Description	Unit
C	Dynamic load capacity	N
Fcomb	Dynamic combined equivalent load	N
Fcomb/C	Load ratio
s	Lubrication interval as travel distance	km