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XY table with overrun protection
Product name | Precision Ball Screws |
---|---|
Part number | BSS1505-500 |
Features | Smallest Nut Outer Diameter |
Suitable for med. accuracy linear motion drive.
■Precision Ball Screws
Screw shaft | Nut | |||||
---|---|---|---|---|---|---|
Material | Hardness | Screw DIA.(mm) | Lead(mm) | Overall length(mm) | Material | Hardness |
4115 Alloy Steel | Carburized 58~62HRC | φ8 | 2 | 100-210 | 4130 Alloy Steel | Carburized 58~62HRC |
φ10 | 2 | 100-315 | ||||
4150 Alloy Steel | Induction hardened 58~62HRC | 4 | 150-380 | |||
10 | 150-450 | |||||
4115 Alloy Steel | Carburized 58~62HRC | φ12 | 2 | 150-445 | ||
4150 Alloy Steel | Induction hardened 58~62HRC | 4 | 150-400 | |||
5 | 150-450 | |||||
10 | 200-600 | |||||
φ15 | 5 | 150-1095 | ||||
10 | 200-1095 | |||||
20 | 230-1095 | |||||
φ20 | 5 | 200-1000 | ||||
10 | 250-1500 | |||||
20 | ||||||
φ25 | 5 | 300-995 | ||||
10 | 300-1500 | |||||
20 |
■Features of Compact nut
Compact nut O.D.
Suitable for limited space applications
■Ball screw selection steps
↓
↓
↓
■Ball screw accuracy
Accuracy grade: C10 | (mm) |
Screw shaft DIA. | Lead | Axial clearance | Twist direction | Nut pilot tolerance | (1) (2) | (3) | (4) (5) | (6) | (7) |
---|---|---|---|---|---|---|---|---|---|
Runout tolerance (Max.) | Runout tolerance (Max.) | Perpendicularity tolerance (Max.) | Perpendicularity tolerance (Max.) | Runout tolerance (Max.) | |||||
φ8 | 2 | 0.005 or less | Right | -0.007/-0.020 | 0.011 | 0.011 | 0.005 | 0.010 | 0.012 |
φ10 | 2・4・10 | ||||||||
φ12 | 2・4・5・10 | ||||||||
φ15 | 5・10・20 | -0.009/-0.025 | 0.012 | 0.012 | 0.011 | 0.015 | |||
φ20 | 5・10・20 | ||||||||
φ25 | 5・10 | 0.013 | 0.013 | 0.013 | 0.019 | ||||
20 | -0.010/-0.029 |
(mm)
Screw shaft DIA. | (8) Runout tolerance (Max.) / Screw shaft length | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
-125 | 126-200 | 201-315 | 316-400 | 401-500 | 501-630 | 631-800 | 801-1000 | 1001-1250 | 1251- | |
φ8 | 0.035 | 0.050 | 0.065 | - | - | - | - | - | - | - |
φ10 | 0.040 | 0.055 | 0.065 | 0.080 | 0.090 | |||||
φ12 | ||||||||||
φ15 | - | 0.045 | 0.055 | 0.060 | 0.075 | 0.090 | 0.120 | 0.150 | 0.190 | |
φ20 | ||||||||||
φ25 | - | 0.040 | 0.045 | 0.050 | 0.060 | 0.070 | 0.085 | 0.100 | 0.130 |
■Ball screw load ratings
Screw shaft DIA. | Lead | Basic load ratings | |
---|---|---|---|
C (Dynamic) kN | Co (Static) kN | ||
φ8 | 2 | 1.95 | 2.6 |
φ10 | 2 | 2.25 | 3.3 |
4 | 3.35 | 5.9 | |
10 | 2.2 | 3.5 | |
φ12 | 2 | 2.45 | 4.1 |
4 | 3.6 | 6.75 | |
5 | 5.95 | 9.8 | |
10 | 3.85 | 5.9 | |
φ15 | 5 | 6.9 | 12.5 |
10・20 | 4.4 | 7.9 | |
φ20 | 5 | 8.35 | 17.5 |
10 | 13.5 | 25.1 | |
20 | 9.2 | 16.2 | |
φ25 | 5 | 9.4 | 22.2 |
10 | 16.1 | 33.4 | |
20 | 10.4 | 20.1 |
■Ball screw life calculations
Ball screw life time is calculated by the following formula.
- Definition of basic dynamic load rating -
Basic dynamic load rating is an axial load applied on ball screws where a group of the same ball screws
are operated and 90% of the specimen will reach 1,000,000 (10^6) rotations without showing any flaking.
- About average axial load and average rotational speed. -
This needs to be calculated based on the motion pattern.
While it is difficult to accurately obtain load condition, etc, we do know that the ball screws operating life is inversely proportional to the third power of the load.
- Motion pattern example - (T1+T2+T3=100%)
Motion pattern | Axial load | Rotational speed | Time proportion |
---|---|---|---|
A | P1N | N1min^-1 | t1% |
B | P2N | N2min^-1 | t2% |
C | P3N | N3min^-1 | t3% |
Product name | Stopper for Ball Screws |
---|---|
Part number | BSTS12 |
Urethane stopper for overrun protection
■Stopper for Ball Screws
(mm)
Material | Hardness | Applicable ball screw DIA. | Stopper plate thickness | Ball screw shaft center height |
---|---|---|---|---|
Ether based polyurethane | Shore A90 | φ8 | 15 | 17 |
φ10 | 18 | 23, 25 | ||
φ12 | 18 | 23, 25 | ||
φ15 | 20 | 26, 28, 30 | ||
φ20 | 20 | 30 | ||
φ25 | 20 | 35 |
Product name | Linear Guides for Medium Load |
---|---|
Part number | SV2R-MX24-520-WC |
Features | Compliant with the industry standard specifications. |
Standard block, Medium load, normal clearance linear guide
■Linear Guides for Medium Load
Material | Hardness | Overall height(mm) | Rail length(mm) |
---|---|---|---|
Carbon steel | 58HRC~ | 24 | 160-1480 |
28 | 220-1960 | ||
33 | 220-1960 |
Linear guide selection steps
↓
↓
Preload and accuracy reference Standards
(μm)
Dimension tolerance of H | ±100 | |
---|---|---|
Pair variation of H | 20 | |
Dimension tolerance of W2 | ±100 | |
Pair variation of W2 | H24・28 | 20 |
H33 | 30 |
(μm)
Rail length | |||||||||
---|---|---|---|---|---|---|---|---|---|
-250 | 251-400 | 401-500 | 501-630 | 631-800 | 801-1000 | 1001-1250 | 1251-1600 | 1601-2000 | |
Running Parallelism | 7 | 12 | 14 | 18 | 21 | 23 | 25 | 27 | 28.5 |
■Linear guide load ratings (For med. loads, Normal clearance, Standard grade)
Overall height | Basic load rating | Allowable static moment | ||
---|---|---|---|---|
C (Dynamic) kN | C 0 (Static) kN | MA・MB N・m | Mc N・m | |
24 | 5.0 | 8.23 | 33 | 57 |
28 | 7.2 | 12.1 | 58 | 135 |
33 | 11.7 | 19.6 | 109 | 225 |
Linear guide life calculations
For Linear Guide applications, sufficient hardness is required for ball contact shafts. Inappropriate hardness causes less allowable load, resulting in shorter life. Please correct the rated life according to the hardness factors.
If the linear guide temperature exceeds 100°C, the linear guide and rail hardness decreases. This results in a lower allowable load and a shorter life when compared to an application at room temperature. Please correct the rated life according to the temperature factor.
*Please use linear guide under the allowable temperature shown on each product page.
Table-1. Contact factor
Number of Linear Guide Blocks on One Rail | Contact Fator fC |
1 | 1.00 |
2 | 0.81 |
3 | 0.72 |
4 | 0.66 |
5 | 0.61 |
For actual applications, more than 2 blocks are generally used per rail. In this case, load applied to each block varies depending on machining precision but is not uniformly distributed. As a result, the per-block allowable load varies depending on the number of blocks per rail. Please correct the rated life according to Table 1 : Contact Factor
Table-2. Load factor
Condition of Use | fw |
---|---|
No external shocks or vibrations and speed is low 15m/min or less | 1.0-1.5 |
No significant shocks or vibration and med. speed 60m/min or less | 1.5-20 |
External shocks and vibrations exist and the speed is high 60m/min or over | 2.0-3.5 |
To calculate load applied to the linear system, in addition to object weight, inertia force attributed to motion velocity, moment loads and 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 in order to simplify the Life Calculations.
Design steps can be reduced by utilizing ball screws, support units and height adjusting blocks for linear guides.
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MISUMI Vietnam Company Limited, Legal Representative: Tomohiro Watanabe,
phone: 0222-361-1555, e-mail: cs@misumi.com.vn, Enterprise Code: 0107514576,
Date of Issuance: 22 July 2016, Place of Issuance: Bac Ninh, Business Certificate No. 6573041568-KD dated 27 September 2016 issued by the People's Committee of Bac Ninh
Công ty TNHH MISUMI Việt Nam, Đại diện theo pháp luật: Tomohiro Watanabe,
Điện thoại: 0222-361-1555, e-mail: cs@misumi.com.vn, Mã số doanh nghiệp: 0107514576,
ngày cấp 22/7/2016, nơi cấp: Bắc Ninh, Giấy phép kinh doanh số: 6573041568-KD ngày cấp 27/9/2016 bởi UBND tỉnh Bắc Ninh
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