# O-ring for piston, replacement part for hammer drill model TMM1250 (19) — No name

**URL:** https://aio.lv/en/product--no-name-ytmm0419--11876773
**Data updated:** 2026-03-09 20:41 (EET)
**Category:** Power Tools Accessories
**Manufacturer:** No name
**Manufacturer code:** YTMM0419
**EAN:** 5903755113467
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 4.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 3.71 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--no-name-ytmm0419--11876773

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

O-ring designed as a replacement piston seal for hammer drill model TMM1250 (19). Manufactured to fit the specified piston assembly, it provides sealing to maintain air and hydraulic pressure within the tool's piston chamber. Suitable for repair and maintenance of the TMM1250 hammer-drill to restore performance and prevent leaks during drilling and chiselling tasks.

## Long description

O-ring for piston, replacement part for hammer drill model TMM1250 (19) is a circular sealing element manufactured to match the piston assembly of the TMM1250 hammer drill. It is intended to restore and maintain airtight and fluid-tight sealing inside the piston chamber, preventing loss of pressure that can reduce impact force or cause leakage during drilling and chiselling operations. The part is a basic consumable used during routine repair and maintenance to return the tool to correct working condition.
Advantages
This replacement O-ring provides a tight seal tailored to the piston geometry of the TMM1250 (19), helping to maintain consistent pressure and reliable impact performance. It minimizes the risk of air or fluid leakage that can lead to decreased efficiency or premature wear of other piston components. The simple design allows straightforward replacement during service, supporting cost-effective repairs without replacing the entire piston assembly.
Suitable for
 Repairing pressure loss or leakage in the piston chamber of the TMM1250 hammer drill
 Routine maintenance to restore optimal impact performance
 Replacing worn or damaged piston seals after extended use
 Workshop and field service tasks where maintaining sealing integrity is required
Key specifications
 Function: piston chamber sealing element for hammer drill
 Shape: circular O-ring profile designed to fit the specified piston assembly
 Material: elastomeric sealing material suitable for pneumatic/hydraulic pressure in power tools
 Compatibility: sized to match the mechanical dimensions of the TMM1250 piston assembly
 Application: sealing against air and fluid to maintain pressure and prevent leaks
How to use
To replace the piston O-ring, disassemble the hammer drill according to the manufacturer's service instructions until the piston assembly and old seal are accessible. Carefully remove the worn O-ring, clean the sealing groove and mating surfaces to remove debris and residues, then install the new O-ring ensuring it sits evenly in the groove without twisting. Reassemble the piston assembly and the tool, then perform a functional check to confirm correct sealing and restored impact performance. Use appropriate tools and follow safety procedures during disassembly and reassembly.
Usage recommendations
Use only O-rings that match the piston dimensions and material requirements for the TMM1250. Inspect related components such as the piston surface and housing for scratches or grooves that can damage a new seal, and replace any worn parts to ensure long-term sealing performance. Apply a light, compatible lubricant if recommended by the tool's service guide to ease installation and protect the seal during initial operation.

## FAQ

### How much does the O-ring for piston — No name TMM1250 (19) cost, and is it available for purchase?

The price is 4.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 15.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All No name products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized No name service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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