TG 25x42x8mm NBR Threaded OD Oil Seal Gearbox

This aftermarket TG threaded outer diameter oil seal measures 25mm inner diameter, 42mm outer diameter and 8mm in height, manufactured in black NBR nitrile rubber. It features a threaded outer diameter, double-lip design with garter spring and an internal steel skeleton.

Importers, wholesalers and auto repair distributors can submit RFQ with dimension, quantity, destination and working medium for a formal quotation. Standard production Lead Time is 7–15 days.

Features & Benefits

The threaded outer diameter improves press-fit stability in the housing bore and resists seal rotation under vibration, suitable for gearbox half shaft and crankshaft front end applications.
Double lip design with garter spring maintains uniform radial contact pressure; the primary lip retains gear oil while the secondary lip blocks dust and water spray.
Black NBR nitrile rubber offers good oil resistance and wear resistance, compatible with gear oils, engine oils and standard lubricants.
Internal steel skeleton with full rubber coating provides structural rigidity and reliable static sealing in the housing bore.
Compact 25x42x8mm dimensions suit small-diameter shafts commonly found in gearboxes and crankshaft front ends.
This is an aftermarket replacement seal. Always verify shaft diameter, housing bore and application before ordering.

• MOQ：Depends on spec; typically 100–5,000 pcs. Lead Time: 7–15 days. This SKU quantity confirmed on quotation.
  Factory standard options are available for marking and packaging; confirm all requirements on RFQ.

Material & Process

• Sealing lip：NBR (nitrile butadiene rubber), black
• Reinforcement：internal steel skeleton with threaded rubber outer coating
• Spring：carbon steel garter spring
  Continuous working temperature: -30°C to +100°C; short-term peak up to +120°C. Confirm compound grade with RFQ for high-temperature applications.
  Compatible fluids: gear oil, engine oil, standard lubricants

Applications & Compatibility

Commonly used for gearbox half shaft seals and crankshaft front end seals in automotive applications. Application context commonly listed for this size — verify housing bore type and shaft speed before order.
Aftermarket replacement. Verify shaft diameter, housing bore and application before order.

Selection & Installation

Selection Tips

Confirm shaft ID 25mm, housing OD 42mm and seal height 8mm. The threaded outer diameter is designed for press-fit into standard bores. Match NBR material to your gear oil or engine oil type.

Installation Steps

1. Thoroughly clean the shaft and housing bore; remove all burrs, old seal residue, rust and contamination.
2. Lightly lubricate the sealing lip and shaft with compatible oil. Do not install dry.
3. Press the seal evenly into the housing using a proper installation tool, keeping it perfectly perpendicular to the bore.
4. Do not strike the rubber lip or hammer directly on the seal. Protect the threaded outer surface from damage.
5. After assembly, rotate the shaft by hand to check for binding, then inspect for leakage during initial test run.

Packaging & Delivery

Standard packaging: neutral polybag per piece, packed in export cartons. Typically 500–1,000 pcs per carton, adjustable on request.

• Lead Time：7–15 days for this standard spec. MOQ: Depends on spec; typically 100–5,000 pcs; this SKU quantity confirmed on quotation.
  Samples and small trial lots are available for stocked sizes; sample freight confirmed on RFQ.
  Send an inquiry with size (ID×OD×height in mm), quantity, destination country and duty for a firm lead time.