Tianjin SWKS Technology & Development Co.,Ltd is one of the most reliable manufacturers and suppliers of custom pom linear rail end stop blocks in China. If you're going to buy bulk cheap custom pom linear rail end stop blocks, welcome to get quotation from our factory. Quality products and low price are available.
Need a drawing-based end stop for a compact linear slide? Send the rail arrangement, carriage outline and intended stopping conditions to amanda@tjswks.com. SWKS can review a custom POM linear rail end stop block with a mounting foot and a defined contact wall for your mechanism.
A Dedicated Contact at the End of Travel
A small transfer slide may need a physical boundary where the moving carriage finishes its permitted travel. The plastic block sits beside or beyond the rail and presents a contact surface at the selected position. Its mounting geometry follows the machine base; its upright face follows the available carriage contact area. It is a separate end-position component rather than a bearing insert that runs along the guide.
The illustrated concept uses two recessed mounting holes in a low foot, an upright wall and side ribs. These features are a starting point for a custom drawing, not a universal rail standard. Hole spacing, wall height, approach direction and clearance around the carriage are established for each assembly. The block can be considered for manually moved slides, small fixtures and guided mechanisms where the designer has defined the permissible contact conditions.
Define How the Carriage Reaches the Stop
The most useful first question is whether contact is occasional, part of each operating cycle, or only possible during an abnormal overtravel event. A carriage pushed slowly by hand creates a different requirement from a powered axis approaching at speed. Moving mass, velocity, contact frequency and the way the drive is stopped all affect the load seen by the block and its screws.
POM is a relatively rigid engineering plastic. A molded POM stop should not be treated as a soft energy absorber. If an axis needs impact damping, that function must be addressed separately in the mechanism and validated. No permissible impact energy, stopping force or safety function is implied by the product photographs. Those values need application-specific engineering and testing.
Coordinate the Contact Wall with the Moving Assembly
The contact face should meet the intended carriage feature without touching the bearing seals, lubrication fitting, fastener heads or other delicate details. Share the carriage envelope at both normal and maximum travel positions. This helps locate the stop wall and shows whether the available face is broad enough to avoid concentrated edge contact.
Approach alignment also matters. An offset touch point can twist the block instead of loading it in the intended direction. The contact height relative to the mounting foot influences the bending moment at the wall base. Wall thickness, the root radius and rib layout are reviewed together, while maintaining access to the fixing screws. Where the design needs a replaceable contact feature or a separate compliant element, identify it in the assembly drawing.
Mounting Details That Support a Repeatable Position
Two mounting holes provide a defined fixing pattern, but the screws alone do not describe the entire location method. Specify the supporting base surface, hole fit, fastener size and any locating shoulder or pin. The stop position may depend on a machined datum in the machine base, an assembly setting procedure, or a dedicated locating feature in the molded part.
For counterbored holes, the head recess must leave enough material below and around the screw. Washer seating, tool access and installation torque should be checked with the actual hardware. Sustained compression can change the behavior of a plastic joint over time, so installation requirements should consider service temperature and expected maintenance intervals. Metal compression limiters or inserts, if required, are quoted as drawing-specific features rather than assumed additions.
| Drawing item | Information needed for review |
|---|---|
| End position | Distance from the machine datum to the stop contact face |
| Carriage contact | Touching surface, approach direction and available contact height |
| Fixing pattern | Hole centers, screw size, recess diameter and supporting footprint |
| Operating conditions | Moving mass, approach speed, contact frequency and temperature |
| Acceptance checks | Position tolerance, assembly fit and agreed contact test conditions |
POM Selection and Injection Mold Layout
The acetal grade is selected against the actual duty, environment and required dimensions. Please identify lubricants, cleaning agents, heat exposure and outdoor use rather than relying on the material name alone. Natural white and other color requests can be reviewed with the selected resin; a color illustration does not establish a particular grade or approval.
During mold review, the wall-to-foot transition receives particular attention. Very thick junctions can create uneven shrinkage, while abrupt changes can make local distortion harder to control. Ribs, radii and draft are balanced with the functional contact surface and the screw seats. The tool proposal also considers how the recessed holes will be formed and where parting lines, gate traces and ejector marks can be placed.
Mark the surfaces that locate the block, carry the screw heads and contact the carriage as functional areas. Their dimensional requirements should be explicit on the drawing. If a face requires a secondary operation after molding, the quotation should identify that operation and its inspection method. A visual rendering cannot establish final flatness or positional accuracy.
Sample Checks Before Regular Supply
Fit samples to the intended machine base with the production fasteners. Check that the stop sits firmly without rocking, the screwdriver or socket can reach both screws, and the moving assembly reaches the intended face without interference. Measure the final contact position after tightening rather than relying only on the loose-part dimensions.
Where contact is repeated, test the agreed operating sequence and inspect the wall root, fixing area and contact surface for movement or damage. The review should include the complete assembly and the actual drive behavior. A mechanical stop must not be used to compensate for an undefined control sequence or unverified overtravel condition.
Request a Custom Linear Slide End Stop
For an inquiry, provide STP, STEP or IGS data together with a dimensioned drawing, target quantity and rail/carriage layout. Include the desired end position, contact duty, fastener details and any marking or packing requirements. SWKS will review the molded geometry and any specified secondary work for quotation. Contact amanda@tjswks.com or 0086-15222707659 with your custom POM linear rail end stop block requirements.
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