Crossed roller bearing & gonio way
22Pages

Crossed Roller Bearing Gonio Way Headquarter: (T)：+886-6-270-3518 (F)：+886-6-270-3510 71756 No.22, Aly. 53, Ln. 428, Sec. 3, Wenhua Rd., Rende Dist., Tainan City 717, Taiwan (R.O.C.) E-mail：sft@sftechnology.com.tw Sales & Marketing division northern Taiwan (T)：+886-3-452-9922 (F)：+886-3-463-6060 32057 2F., No.1, Ln. 30, Xiyuan Rd., Zhongli Dist., Taoyuan City 320, Taiwan (R.O.C.) Further information www.sflinear

Cross Roller Bearing ■ Formulas ( for basic ratings & dynamic-equivalent radial loads) P.3 ■ An example on the calculation of rated life-------------------- P.4 ■ Formulas ( for static safety coefficient & static-equivalent radial loads) P.5 ■ Radial clearances & fittings P.9 ■ Methods and design of supporting seats & flange discs P.10 ■ Flange discs and fastening screws P.11 ■ Composition of SRU & SRB model numbers P.14 Gonio ways ■ Production introduction & precautions on uses P.19-20 is a manufacturer focusing on the production, design and R&D of linear...

Cross roller bearings (SRB and SRU series)

Cross roller bearings Models and specifications of cross roller bearings (models with inner rings integrated with outer rings) as the characteristics of their hole locations have been set, their installation does not require the use of flange discs and supporting seats, therefore achieving stable running accuracy and moments of torque. Cross roller bearings are made up of inner rings, outer rings, multiple rollers and clearance retainers; the rollers are arranged on the V-shaped grooved rolling surface perpendicular to the clearance retainers, so the resulting structure is able to withstand...

Basic rated life & dynamic-equivalent radial loads An example for calculation of rated life Basic rated life An example for calculation of rated life 90% of the bearings of the same specifications running under identical conditions can no longer be used because of the surface peeling resulting from rolling fatigue when a certain revolution number is reached and this number is termed their rated life. ♦ The life of cross roller bearing is calculated per the following formula: L : basic rated life C : basic dynamic rated load P : dynamic-equivalent load 6 The number of revolutions is...

Static safety coefficient & static-equivalent radial load Accuracy specifications SFT Static safety coefficient Is determined by the basic static rated load (Co) and static-equivalent radial load (Po). When load is imposed by a static or dynamic method, the static safety coefficients shown in the following figure must be considered. fs : static safety coefficient (see the following table) Co : basic static rated load (kN) Po : Static-equivalent radial load (kN) (fs) Static safety coefficient Static-equivalent radial load: Po ♦ The static-equivalent radial load on cross roller bearings is...

Accuracy specifications Accuracy specifications Accuracy specifications r ID of bearings (d) in metric units (mm) Above Below

Radial clearance/fittings Methods and design of the supporting seats and fixed flange disc Radial clearance Methods and design of the supporting seats and fixed flange discs ♦ Table 10 Radial clearances for SRB models unit: |jm ♦ Table 11 Radial clearances for SRU models unit: jm Table 10 shows the radial clearances for standard SRB models and table 10 shows those of SRU models. Due to the thin wall structure of the cross roller bearings, full consideration must be given to the rigidity of the supporting seats or flange discs. When the bearings are split types, they can not evenly...

Installation steps Flange discs and locking screws ♦ (Table 2) Locking torque of Flange discs and locking screws The values of the wall thickness (F) or the clearance (S) of the flange discs may be designed per the following formula. As for the quantity of locking screws, they may be configured at equal intervals by using the quantity shown in table (1). It is recommended to fixate the flange discs using materials made of iron. It is advised to firmly lock the screws using torque wrenches. See table (2) for the locking torques of supporting seats or supported flange discs which are made of...

Crossed Roller Bearing Other precautions Composition of the SRU&SRB model numbers Composition of model numbers ◆ SRU models (inner rings integrated with outer rings) (1) No. 2 lithium soap based grease is filled into the cross roller bear ever, the products need lubricating on regular basis and users are required to re-apply grease of the same series at a minimum interval ranging from 6 to 12 months to enable the distribution of grease within the entire internal structure of the bearing. (2) Avoid using mixed lubrication grease of various kinds. (3) When the bearings are used under the such...

inner rings integrated with outer rings Inner and outer rings molded of SRU model inner rings integrated with outer rings 0d (note) SRU model can be choose lubricate nozzle see below chart If necessary .marked n at the end of the model.

SRB models outer ring split type SRB models outer ring split typeSRB models outer ring split type 0d grease hole dimension drawing SRB--UU Type unit: mm (note) SRB.. .UU model which contains the sealing washer This model rotate in its inner ring (note) SRB.. .UU model which contains the sealing washer This model rotate in its inner ring

Accuracy specifications Crossed Roller Bearing Gonio ways Are non-circulating arc movement tracks whose precise cross rollers have extremely low friction resistance to provide a stable arc movement. They are mainly used in locating operations where rotation centers remain unchanged and correct changes of tilting degrees are required; they may also be applied to meet the purposes of optical instruments and measuring devices requiring high accuracy. Product features ● High rigidity and high loads ● Identical locations of rotation centers ● Low friction and accurate movement ● Easy...