Weldmark TIG Collet Body #9, 20, 25 Torch Pk = 5 (13N27-1/16″) Replacement Part Breakdown

The Weldmark TIG Collet Body #9, 20, 25 Torch Pk = 5 (13N27-1/16″) is a replacement torch component used in the collet stack. In practical terms, this part helps locate and support the tungsten and collet assembly inside the torch head. If the tungsten slips, the arc becomes inconsistent, or the consumable stack will not assemble correctly, the collet body is one of the first parts to inspect.

This article is a buyer and troubleshooting guide for maintenance teams, welders, and parts buyers who need to verify whether the part is the right replacement before ordering. Use the checks below to confirm condition, fit, and application. Do not assume compatibility from the torch size alone. Verify the torch model, internal thread pattern, and consumable family before installation.

Key Takeaways

• This is a replacement collet body for TIG torch consumable stacks, not a universal part.
• Fit depends on torch series and consumable system. Verify the torch before ordering.
• Wear, heat damage, and cross-threading can cause tungsten slippage and poor arc stability.
• If the tungsten will not clamp securely, inspect the full stack: collet, collet body, back cap, and cup.
• Use the product listing as a reference point only. Confirm dimensions and compatibility in your own setup.

What the part does

The collet body sits inside the TIG torch head and works with the collet to hold the tungsten in position. When the internal bore or external thread area is worn, the tungsten may not stay fixed. That can show up as a wandering arc, inconsistent stickout, or visible damage to the consumable stack.

For support teams, the most useful question is not simply “is the part available?” It is “does the torch need this part, and does the replacement match the torch body and consumable family?” In many cases, the failure is not the collet body alone. A worn collet, cracked cup, damaged insulator, or heat-distorted back cap can create the same complaint.

Troubleshooting: when to suspect the collet body

• Tungsten slips even when the collet is tightened correctly.
• Arc starts are inconsistent after repeated tungsten regrinds and resets.
• Threads feel rough, gritty, or no longer engage smoothly.
• Consumables overheat, discolor, or show localized galling near the torch head.
• The torch requires more tightening than usual to hold the electrode.

Check

Remove the cup, back cap, collet, and tungsten. Check the collet body for heat tint, spatter, nicks, deformation, or thread damage. Look for signs that the bore is no longer round or that the electrode seat is worn.

Inspect

Inspect the mating parts as a set. A damaged collet can mimic a bad collet body. A bent tungsten can also make the assembly feel loose or unstable. If the torch head has been dropped, inspect for cracked insulators and distorted internal hardware.

Verify

Verify the torch model and consumable series before ordering a replacement. If the torch identification is unreadable, compare the current parts to a known sample from the same torch family. When compatibility is uncertain, record it as Unknown (Verify) and do not release the order until confirmed.

Replacement decision points

Replace the collet body when the wear is mechanical and repeatable. That includes damaged threads, obvious heat distortion, or a bore that no longer supports the tungsten properly. If the only issue is poor arc quality, do not stop at the collet body. Check gas coverage, tungsten condition, power settings, and work lead connection as well.

If the torch has repeated overheating, address the cause before installing new parts. A replacement consumable will not solve a cooling issue, an oversize tungsten for the application, or abuse from excessive duty cycle.

Product / parts section

The referenced product is the Weldmark TIG Collet Body #9, 20, 25 Torch Pk = 5 (13N27-1/16″). The available ASIN in the Forge OS registry is B071SHY115. Use the product box below as the checkout reference point.

No products found.

Before purchase, verify the following:

• Torches supported by this part in your shop.
• Whether the torch uses this exact collet body style or a different consumable family.
• Required tungsten diameter and matching collet size. Unknown (Verify) if not documented.
• Whether the part count in the package matches your maintenance requirement.

Install and support checks

1. Power down the welding machine and isolate the torch.
2. Disassemble the cup, back cap, collet, and tungsten.
3. Clean the torch head threads and consumable seats.
4. Compare the old and new collet body side by side.
5. Hand-start threads only. Do not force engagement.
6. Install the tungsten and confirm it clamps securely without excessive force.
7. Test the torch on a controlled setup before returning it to production.

If the torch still slips after replacement, verify the collet size, tungsten diameter, and mating consumables. Also check for heat damage in the torch head. Do not keep tightening hardware past normal hand torque just to make the tungsten stay put.

Related support articles

• Weldmark 13N26 TIG Collet Body Review: .040″ Replacement Parts for #9, #20, and #25 TIG Torches
• TIG Torch Slipping Tungsten? Your Collet Body Is Worn (Here’s the Fix)

Safety notes

• Shut down and isolate the power source before disassembly.
• Allow hot torch parts to cool before handling.
• Do not use damaged consumables that will not thread or seat correctly.
• If the torch shows heat damage beyond the consumable stack, remove it from service until inspected.
• Use PPE when handling worn tungsten, sharp collet edges, or contaminated parts.

FAQ

How do I know if the collet body is the problem?

Start with the symptom. If the tungsten slips, the threads feel damaged, or the torch head shows repeatable wear at the same point, inspect the collet body. If the issue is only arc instability, verify the entire torch setup before replacing parts.

Can I confirm compatibility from the product title alone?

No. The title is a starting point, not proof of fit. Verify the torch series, consumable family, and tungsten size before ordering. If documentation is incomplete, mark the match as Unknown (Verify).

What else should be replaced with a worn collet body?

Inspect the collet, tungsten, cup, back cap, and insulator. Replace any part that is cracked, heat damaged, or no longer threads and seats correctly. A worn collet body often appears alongside other consumable wear.

Does a new collet body fix poor arc performance by itself?

Not always. It may fix tungsten clamping issues, but arc quality also depends on gas flow, tungsten prep, work clamp condition, and machine settings. Verify the full system.

Sources Checked

• Provided Amazon product registry reference for ASIN B071SHY115
• Allowed internal link: Weldmark 13N26 TIG Collet Body Review
• Allowed internal link: TIG Torch Slipping Tungsten? Your Collet Body Is Worn (Here’s the Fix)

For maintenance buyers, the main decision is simple: verify the torch family, inspect the full consumable stack, and replace the collet body only when the wear pattern supports it. That keeps the order accurate and reduces repeat failures in the field.

Disclosure: As an Amazon Associate, Weld Support Parts may earn from qualifying purchases.

Related Weld Support Guides

• Weldmark 13N26 TIG Collet Body Review: .040″ Replacement Parts for #9, #20, and #25 TIG Torches
• TIG Torch Slipping Tungsten? Your Collet Body Is Worn (Here’s the Fix)