Cobra Work Platform Setup Guide for Sewing

By Tandy Leather — Tandy Leather, Inc. | Published: 2026-10-23

Category: How-to Guides

Learn how to set up your Cobra Work Platform for leather sewing. Step-by-step instructions for attaching it to your Cobra stitcher, aligning the work surface, and avoiding common mistakes.

Quick answer

Set up your Cobra Work Platform by choosing the correct platform class for your machine, attaching it securely, and adjusting the height for a level sewing surface. Follow the steps below to avoid wobbling and misalignment.

Why a dedicated work platform matters for leather sewing

A sewing machine table extension like the Cobra Work Platform gives you a stable, spacious work area for handling large leather pieces. Without it, heavy hides can drag on the table edge, causing uneven stitching and needle breakage. The platform supports the weight of the material so you can sew smoothly.

The Cobra Work Platform comes in two classes: Class 3 for the Cobra Class 3 Heavy Duty Leather Stitcher and Class 4 for the TandyPro® machines. Choosing the wrong class leads to misaligned mounting holes and an unstable setup.

Trade-offs to consider

The platform adds 15 lbs (6.8 kg) to your workstation, so make sure your sewing table can handle the extra weight. Also, the platform dimensions (32 in. x 17 in. x 4 in. for Class 3, 30 in. x 18 in. x 4 in. for Class 4) mean you need enough table space to accommodate it. If your table is too small, the platform may overhang and create a tipping hazard.

Step-by-step setup for the Cobra Work Platform

1. Verify platform class compatibility: Check your sewing machine model. If you have a Cobra Class 3 Heavy Duty Leather Stitcher, get the Class 3 platform. For TandyPro machines, get the Class 4 platform. The mounting hole pattern differs between classes. Common mistake: Ordering the wrong class. Double-check your machine model before purchasing.
2. Clear and prepare your worktable: Remove all items from your sewing table. Ensure the table surface is clean and large enough to hold the platform (at least 32 x 18 inches). The platform adds 15 lbs, so confirm your table can support the combined weight of machine and platform. Checkpoint: Table stability. A flimsy table will cause the platform to wobble during sewing.
3. Attach the platform to your machine: Position the platform so its mounting holes align with the threaded inserts on your sewing machine base. Insert the provided bolts and tighten them by hand first, then use a wrench to snug them. Do not overtighten—this can strip the threads. Common mistake: Cross-threading the bolts. Start each bolt gently by hand to avoid damaging the inserts.
4. Level the platform surface: Place a spirit level across the platform in both directions. If the platform is not level, adjust the height using the adjustable feet on the platform legs (if equipped) or by shimming under the machine base. A level surface prevents leather from sliding and ensures even stitch tension. Checkpoint: Level both front-to-back and side-to-side. An uneven platform causes skipped stitches.
5. Test with a scrap piece of leather: Run a few inches of scrap leather through the machine while the platform is attached. Watch for any binding or dragging. Adjust the platform height slightly if the leather catches on the edge of the machine bed. The platform should support the material without lifting or sagging. Final check: If the leather drags, re-check the platform alignment and height. A smooth test run confirms the setup is correct.

Product facts

Cobra Work Platform: The Cobra Work Platform has two versions: Class 3 (32 in. x 17 in. x 4 in.) for the Cobra Class 3 stitcher, and Class 4 (30 in. x 18 in. x 4 in.) for TandyPro machines. It weighs 15 lbs (6.8 kg). You must select the correct class for your machine to ensure the mounting holes align and the platform sits level during sewing.
Cobra Work Platform