How to Use Trim in SolidWorks Sketch: Step-by-Step Guide

In SolidWorks Sketch, use the Trim Entities tool to remove unwanted sketch segments by clicking or dragging over them. Access it from the Sketch toolbar or by pressing S and selecting Trim Entities, then select the trim type and click on the parts you want to delete.

Syntax

The Trim Entities tool in SolidWorks Sketch has several modes to remove or trim sketch segments:

• Power Trim: Drag cursor over segments to trim quickly.
• Trim to Closest: Click a segment to trim it to the nearest intersection.
• Corner Trim: Click two segments to trim and form a corner.
• Trim Away Inside: Removes all segments inside a closed profile.
• Trim Away Outside: Removes all segments outside a closed profile.

You activate the tool from the Sketch toolbar or by pressing S and selecting Trim Entities. Then choose the trim type and click or drag on sketch lines to trim.

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Trim Entities Tool Usage:
1. Activate Trim Entities (Sketch toolbar or press S > Trim Entities)
2. Select trim type (Power Trim, Trim to Closest, Corner Trim, etc.)
3. Click or drag over sketch segments to trim
4. Press Esc or right-click to exit trim mode

Example

This example shows how to use Power Trim to quickly remove unwanted sketch lines:

1. Open a sketch with overlapping or extra lines.
2. Activate Trim Entities from the Sketch toolbar.
3. Select Power Trim mode.
4. Click and drag your mouse cursor over the lines you want to remove.
5. The lines under the cursor will be trimmed or deleted instantly.

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1. Open Sketch with extra lines
2. Click 'Trim Entities' icon or press S and select 'Trim Entities'
3. Choose 'Power Trim' mode
4. Click and drag cursor over unwanted lines
5. Lines are trimmed or removed immediately
6. Press Esc to exit trim mode

Output

Sketch lines under cursor are trimmed or deleted instantly as you drag.

Common Pitfalls

Common mistakes when using the Trim tool include:

• Trying to trim lines that are not intersecting or connected, which won't trim properly.
• Using the wrong trim mode for the task, like using Trim to Closest when Power Trim is faster.
• Not exiting trim mode after finishing, which can cause accidental trimming.
• Trimming important construction lines by mistake.

Always zoom in to see intersections clearly and choose the correct trim mode for your sketch.

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Wrong way:
- Select 'Trim to Closest'
- Click a line far from intersections
- No trimming happens

Right way:
- Select 'Power Trim'
- Drag cursor over unwanted segments
- Lines trim immediately

Quick Reference

Trim Mode	Description	When to Use
Power Trim	Drag over segments to trim quickly	Fast removal of multiple unwanted lines
Trim to Closest	Click to trim to nearest intersection	Precise trimming of single segments
Corner Trim	Trim two segments to form a corner	Create neat corners between lines
Trim Away Inside	Remove all inside segments	Clean inside of closed profiles
Trim Away Outside	Remove all outside segments	Clean outside of closed profiles

Key Takeaways

Use the Trim Entities tool to quickly remove unwanted sketch segments in SolidWorks.

Power Trim mode lets you drag over lines for fast trimming.

Choose the correct trim mode based on your trimming needs.

Always check intersections before trimming to avoid mistakes.

Exit trim mode after finishing to prevent accidental edits.