C90700 Sleeve Bushings for Glass-Table Lift Linkages
Request a C90700 tin-bronze sleeve quotation for the mechanical lift linkage of a glass cutting or handling table. The part supports a lubricated linkage pivot below the table, rather than contacting the glass or supporting a high-speed cutting spindle. Review both sides of the lift mechanism when replacing a paired set of pivot sleeves.
Coordinate paired supports through the lift stroke
A broad lift table can rack if opposite linkage supports have different clearances or their axes are no longer aligned. Provide the pivot spacing, sleeve positions, link lengths and table load distribution. Identify where the actuator force enters the mechanism and how the reaction changes as the table rises. Include the positions near the ends of travel, not only the horizontal loading position.
C90700 is a tin-bronze grade listed in BONIU’s machining material directory. The bearing pair and lubrication require deliberate review: tin bronze is not selected simply because a harder sleeve seems desirable. State the pin surface, hardness and alignment requirements with the lubricant plan. Do not treat C90700, CuSn12 or ZCuSn10P1 as interchangeable callouts; retain the exact material and product standard requested on the drawing.
Keep glass dust away from the lubricated pivot
Describe how cutting dust, water or cleaning residue can reach the under-table mechanism. Include covers and the lubricant replenishment method. Reliable lubricant delivery and clean mating surfaces are part of the selection, especially where the pivot dwells under load. This enquiry provides no machine lifting rating or safety-system approval. A damaged link, bent pin or misaligned frame needs correction independently of the sleeve quotation.
Drawing and quotation checklist
Send a dimensioned new-part drawing with units and revision, the mating assembly and the following application details.
| Review item | Information to provide |
|---|---|
| Sleeve geometry | Bore, OD, length, chamfers, housing fit and required installed clearance. |
| Paired-pivot layout | Pivot spacing, common datums, support coaxiality and left/right part identification. |
| Linkage loads | Table weight, working load distribution, actuator geometry, stroke and stop conditions. |
| Bearing pair and environment | Pin material/hardness/finish, lubricant route, dust/water exposure and guarding. |
| Material and order | C90700 with product/casting standard, quantity or matched-set requirement, revision and inspection needs. |
Installation and selection checks
Check both mounting bores and their shared axis before renewing a pair of sleeves. Fit without distorting thin linkage bosses and measure the installed bores. Assemble the pins with the specified retention and lubrication, then confirm that the unloaded mechanism moves freely through its full stroke under the machine’s maintenance procedure. Investigate unequal side movement before restoring the normal table load.
Frequently asked questions
Should both sides be replaced together?
Inspect both sides and use the machine’s repair specification. If a paired set is required, identify each position and the common fit requirements on the purchase drawing.
Is C90700 suitable without grease because it is bronze?
A plain solid-metal sleeve is not automatically dry-running. This application enquiry assumes the lubricant system and replenishment plan are specified and reviewed.
Can oversize sleeves fix a misaligned frame?
An oversize repair may restore a worn housing only after its datum and geometry are defined. It cannot independently correct a bent frame or incompatible pivot axes.
Request a drawing-based quotation
Send the drawing, C90700 tin bronze specification, quantity and operating details through Contact BONIU. Include any required material documentation and inspection criteria. Material route, manufacturing feasibility and delivery are confirmed in the quotation.