No.000208 Table Lifter

Good IDEA!

12

Selection criteria

Easy to assemble with bolt-on flanges.

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Available sizes

■Flanged Linear Bushings - Double Type

Type	Outer Cylinder			Ball	Retainer	Operating Ambient Temperature	Accessory
	Material	Hardness	Surface Treatment	Material	Material
Round Flange Square Flange Compact Flange	52100 Bearing Steel Equivalent	58HRC－	-	52100 Bearing Steel Equivalent	Plastic (Duracon M90 equivalent)	-20－80℃	Seal: Material Nitrile Rubber (-20－120℃)
					Stainless Steel (SUS)	-20－100℃
			Electroless Nickel Plating	440C Stainless Steel Equivalent	Plastic (Duracon M90 equivalent)	-20－80℃
					Stainless Steel (SUS)	-20－100℃
	440C Stainless Steel Equivalent	56HRC－	-		Plastic (Duracon M90 equivalent)	-20－80℃
					Stainless Steel (SUS)	-20－100℃

■Sizes and Dimensions

I.D. (mm)	Length (mm)
3	19
4	23
5	28
6	35
8	45
10	55
12	57
13	61
16	70
20	80
25	112
30	123
35	135
40	151
50	192

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Selection steps

■Linear bushing selection steps

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Accuracy Info

■Accuracy Info. of Flanged Linear Bushings

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Speeds / Loads (Load Info.).

■Speeds / Loads (Load Info.) of Flanged Linear Bushings

I.D. (mm)	Basic Load Rating
	Basic Dynamic Load Rating (N)	Basic Static Load Rating (N)
3	138	210
4	176	254
5	263	412
6	324	529
8	431	784
10	588	1100
12	657	1200
13	813	1570
16	1230	2350
20	1400	2740
25	1560	3140
30	2490	5490
35	2650	6270
40	3430	8040
50	6080	15900

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Technical calculations

■Life of Flanged Linear Bushings

When the linear system is in motion with applied load, the rolling surfaces and races are subject to repeated stress, This stress can cause scale-like flaking due to material fatigue. The total run distance until the flaking appears in the "Life" of the linear system.

Rated life can be calculated with the basic dynamic load rating and the actual load applied on the linear bushings, as shown below.

• L: Rated Life (km).
• fH: Hardness Factor (See Fig.1).
• fT: Temperature Factor (See Fig.2).
• fC: Contact Factor (See Table-3).
• fW: Load Factor (See Table-4).
• C: Basic Dynamic Load Rating (N).
• P: Applied Load (N).

●Hardness factor (fH)

For linear applications, the linear shaft must have sufficient hardness. If it does not, the load rating decreases and the life will be reduced.

Fig. 1. Hardness Factor.

●Temperature factor (fT)

When the temperature of the linear system exceeds 100 degrees C, the hardness will decrease and as a result, the allowable load and life will reduced.

Fig. 2. Temperature Factor.

●Contact factor (fC)

In general, it is common to use two or more bushings on one shaft. In these cases, the load on each bushing will vary depending on the machining precision and will not have equally distributed loads. As a result, the allowable load per bushing will vary depending on the number of bushings used on the shafts. Please compensate the rated life with contact factors on Table-1.

Table-3. Contact Factor.

Number of Bearings Installed on One Shaft		Contact factor fC
1		1
2		0.81
3		0.72
4		0.66
5		0.61

●Load Factor (fW)

To calculate the load applied to the bushings, in addition to the object weight, the inertia force attributed to the motion velocity, moment loads and the variations of each over time must be obtained. However, for reciprocating motion applications, it is difficult to obtain accurate calculations due to the effects of the vibrations and shocks. Therefor, use Table 2 to simplify the life calculations.

Conditions of Use	fw
No shocks vibrations,low speed: 15 m/min. or less	1.0～1.5
No significant shocks vibrations,medium speed: 60 m/min. or less	1.5～2.0
With shocks vibrations, high speed: 60 m/min. or more	2.0～3.5

Life in hours can be obtained by calculating the travel distance per hour. When the stroke length and the number of strokes are constant, it can be calculated using the formula below.

• Lh: Life (Hr.).
• L: Rated Life (km).
• Ls: Stroke length (m).
• n1: Number of cycles per minute (cpm).

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Selection criteria

To make the up/down motion smooth by using it as a part of link mechanism.

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Available sizes

■Rod End Bearings - Standard

Type	Material
	Holder	Spherical Inner Ring	Bushing (Liner)
Steel	1035 Carbon Steel(Trivalent Chromate）	52100 Bearing Steel(58HRC-)	Special Copper Alloy
Oil-Free	Bearing I.D. 3/4 (Trivalent Chromate)	52100 Bearing Steel(58HRC-)	Self-lubricating Synthetic Resin
	Other Than Above	52100 Bearing Steel(58HRC-)	Polytetrafluoroethylene Resin
Stainless Steel Oil Free	303 Stainless Steel	440C Stainless Steel(58HRC-)	Polytetrafluoroethylene Resin

■Sizes and Dimensions

Bearing I.D.	Ball Center - Holder Edge
3	12
4	14
5	16
6	18
8	22
10	26
12	30
14	34
16	38
18	42
20	46
22	50

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Accuracy Info

■Accuracy of Rod End Bearings

Bearing I.D.	I.D. Tolerance (H7)
3	+0.009 0
4	+0.012  0
5
6
8	+0.015  0
10
12	+0.018  0
14
16
18
20	+0.021  0
22

■Allowable Incline

Shaft Step Shape	Shaft Condition	Allowable Incline Angle α
Large	Stepped part of the shaft contacts the outer circumference of the holder.	Small (α1)
Medium	Stepped part of the shaft contacts the side or the inner circumference of the holder.	Medium (α2)
Not Provided	Shaft contacts the inner circumference of the holder.	Large (α3)

Shaft Bore Dia. (mm)	Ball Dia. (mm)			α1(°)		α2(°)		α3(°)
	①	②	③	①	②	①	②	①	②	③
3	-	9.525	-	-	8	-	10	-	42	-
4	-	10.319	-	-	9	-	11	-	35	-
5	11.112	11.112	11.91	8	8	13	13	30	30	12
6	12.7	12.7	14.29	8	8	13	13	30	30	10
8	15.875	15.875	17.46	8	8	14	14	25	25	12
10	19.05	19.05	20.64	8	8	14	14	25	25	12
12	22.225	22.225	23.81	8	8	13	13	25	25	12
14	25.4	25.4	26.99	10	10	16	16	24	24	14
16	28.575	28.575	28.58	9	9	15	15	24	24	15
18	31.75	31.75	31.75	9	9	15	15	24	24	15
20	34.925	-	-	9	-	15	-	24		-
22	38.1	-	-	10	-	15	-	23		-

(1) Steel, (2) Oil-free, (3) Stainless Steel Oil-free.

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Speeds / Loads (Load Info.)

■Static Load Capacity of Rod End Bearings

Bearing I.D.	Static Load Capacity Radial Ca (kN)
	Steel	Oil-Free	Stainless Steel Oil Free
3	-	1.57	-
4	-	2.25	-
5	5.59	3.92	0.98
6	6.86	5	1.44
8	9.8	7.45	2.69
10	13.2	9.41	4.16
12	16.7	11	5.88
14	20.6	15.2	6.61
16	25	20.2	8.33
18	29.4	25.2	11.52
20	34.3	27.8	-
22	41.2	35.9	-

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Selection criteria

Suitable in limited spaces.

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Available sizes

■Small Ball Bearings Double Shielded

Material
52100 Bearing Steel

■Sizes and Dimensions

I.D.	O.D.	Thickness
2	5	2.3
	6	3.0
	7	3.5
2.5	6	2.6
	7	3.5
3	6	2.5
	7	3
	8	4
	9	5
	10	4
	13	5
4	7	2.5
	9	4
	11
	12
	13	5
	16
5	8	2.5
	11	5
	13	4
	14	5
	16
	19	6
6	10	3
	13	5
	15
	17	6
	19
	22	7
8	12	3.5
	16	5
	19	6
	22	7
	24	8
	28	9

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Speeds / Loads (Load Info.)

■Speed and Load of Small Ball Bearings (Double Shielded)

I.D.	Basic Load Rating			Allowable Rotational Speed
	O.D.	Cr (Dynamic) N	Cor (Static) N	rpm
2	5	169	50	85000
	6	330	98	75000
	7	385	127	60000
2.5	6	208	74	71000
	7	385	127	63000
3	6	208	74	71000
	7	390	130	63000
	8	560	179	60000
	9	570	187	56000
	10	630	218	50000
	13	1300	485	40000
4	7	222	88	60000
	9	640	224	53000
	11	715	276	48000
	12	957	350
	13	1300	485	40000
	16	1340	523	36000
5	8	218	131	53000
	11	715	281	45000
	13	1080	430	43000
	14	1330	505	40000
	16	1730	670	36000
	19	2336	835	32000
6	10	495	218	45000
	13	1080	440	40000
	15	1350	530
	17	2190	835	38000
	19	2340	885	32000
	22	3333	1423	30000
8	12	543	274	40000
	16	1610	710	36000
	19	1990	865
	22	3350	1400	34000
	24	4000	1590	28000
	28	4563	1983

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