Mast Guide Bearings
Forklift mast guide bearings are heavy-duty guide rollers used between the carriage and mast channels to support smooth lifting and lowering under radial, shock and side loads. Available models include MG 205–313, MG 5208–5213 and additional size-specific references, with bore diameters from approximately 12.8 to 150 mm. Key dimensions include bore, outside diameter, inner and outer ring widths and outer-ring radius or profile, together with load ratings and weight. TFL supplies mast guide bearing replacements for bearing distributors, forklift parts wholesalers and industrial resellers. Send the existing part number and quantity to start an RFQ; drawings, photos or measured dimensions can be added when the original reference is unavailable or needs further confirmation. Mixed-model orders, custom specifications, OEM or neutral packaging, pre-shipment checks and consolidated shipment are supported.
Built for Toughness: Design of Mast Guide Bearings
Finding the Right Mast Guide Bearing: Size and Interchange
Applications Requiring Robust Mast Guide Bearing Solutions
Forklift Mast Guide Bearing Selection and Sourcing Guide
Best matching method: Send the existing bearing number and required quantity when available. If the number is missing or cannot be confirmed, add the forklift make and model, mast position, photos and measured dimensions. Bore, outside diameter, inner ring width, outer ring width and outer-ring profile are especially useful for identifying an unmarked bearing.
How to Choose a Forklift Mast Guide Bearing
For a known replacement, start with the complete MG part number and compare the suffix and key dimensions. For an unidentified bearing, confirm where it runs in the mast assembly and record the bore, outside diameter, inner ring width, outer ring width and outer-ring profile. Forklift make, model, mast type, photos and application details can be added when they help distinguish between similar references.
| Selection Item | Information to Confirm | Why It Matters |
|---|---|---|
| Part number | Complete MG number and suffix when available | Usually the fastest starting point for a replacement quotation. |
| Forklift and mast | Make, model, mast type and mounting position when known | Helps distinguish similar bearings used in different mast positions or configurations. |
| Inner diameter (d) | Pin or shaft diameter | Confirms the mounting size. |
| Outside diameter (D) | Maximum roller diameter | Must match the mast channel and required running clearance. |
| Ring widths (b and B) | Inner ring width and outer ring width | Controls mounting space and the width of the rail-contact surface. |
| Outer-ring profile | Flat, rounded, tapered, flanged, radiused or chamfered profile | The outer ring runs against the mast channel, so its profile is an important replacement dimension. |
| Load and operating conditions | Forklift capacity, mast stages, shock, duty cycle and environment when relevant | Useful when dimensions alone are not enough to confirm the required bearing specification. |
Identification Note
Do not identify an unknown mast guide bearing from bore and outside diameter alone. Models with similar basic dimensions can differ in ring widths, outer-ring radius or profile, seals and load ratings. A complete part number is preferred; otherwise, photos and additional dimensions help narrow the match.
Common Series and Model Range
Available models include MG 205, 206, 207 and 208 families; MG 305 through MG 313 families; MG 5208 through MG 5213 models; and additional references identified by bore size or application-specific suffixes. The range covers approximately 12.8–150 mm bores and 52–302 mm outside diameters. Dimensions and construction can vary significantly within the same base series, so the complete suffix is important for replacement quotations.
| Model Group | Typical Bore Range | Distributor Buying Note |
|---|---|---|
| MG 205–208 | Approximately 12.8–40 mm | Multiple outside diameters, widths and outer-ring profiles are available under related base numbers. |
| MG 305–309 | Approximately 17–45 mm | Broad suffix coverage makes the complete part number especially useful for RFQs. |
| MG 310–313 | Approximately 50–65 mm | Larger models used across heavier mast bearing requirements. |
| MG 5208–5213 | Approximately 40–65 mm | Confirm both ring widths and the rail-contact profile before approving a replacement. |
| Size-specific models | Up to approximately 150 mm | Drawings, photos or samples are useful when a standard MG reference is unavailable. |
Why the Full MG Suffix Matters
The base MG number does not define the complete bearing. For example, MG 305 DDB, DDE, DDH and DDX all use a 25 mm bore, but their outside diameters, widths, outer-ring radii and load ratings differ. Keep the full suffix in the RFQ whenever it is visible on the original bearing or drawing.
| Example Model | d × D | Inner / Outer Width | Radius | Dynamic / Static Capacity |
|---|---|---|---|---|
| MG 305 DDB | 25 × 76.2 mm | 17 / 25.4 mm | 6.35 mm | 22,390 / 11,490 N |
| MG 305 DDE | 25 × 79.55 mm | 17 / 23.5 mm | 6 mm | 22,390 / 11,490 N |
| MG 305 DDH | 25 × 72 mm | 28 / 28 mm | 2 mm | 61,240 / 65,950 N |
| MG 305 DDX | 25 × 80 mm | 17 / 22 mm | 2.5 mm | 22,390 / 11,490 N |
Outer-Ring Profile, Sealing and Lubrication
The outer ring of a mast guide bearing runs directly against the mast rail, making the contact profile an important replacement detail. Confirm whether the existing bearing uses a flat, crowned, tapered, flanged, radiused or chamfered profile. Seal and grease requirements can also be confirmed when dust, moisture, temperature or maintenance conditions differ from the standard configuration.
Key Information for a Quotation
You do not need to provide every item before requesting a quote. A complete part number and quantity are often enough to start. If the original number is missing, worn or uncertain, additional dimensions, photos, forklift information or a sample can help confirm the correct bearing more quickly.
| Information | How It Helps |
|---|---|
| Complete part number | Provides the fastest starting point for model and suffix matching. |
| Quantity | Allows price, MOQ and lead time to be confirmed with the quotation. |
| d × D × b × B dimensions | Helps identify an unmarked bearing or confirm a dimensional match. |
| Outer-ring radius or profile | Confirms compatibility with the mast rail contact surface. |
| Photos or drawing | Useful when the part number is incomplete or several similar models exist. |
| Forklift make, model and mast position | Provides additional reference information when the bearing cannot be identified from the designation alone. |
| Packaging requirements | Allows OEM, private-label or neutral packing requirements to be included in the quote. |
Replacement and Cross-Reference Notes
TFL supplies replacement options based on the complete MG number, dimensions, drawings, photos or samples provided. For unidentified or obsolete references, the proposed bearing is checked against the required dimensions, outer-ring profile, load rating, seals and mounting fit before the model is confirmed. Price, MOQ and lead time are provided with the quotation.
Common Applications
Forklift mast guide bearings are mainly used in the mast and carriage guidance systems of counterbalance forklifts, reach trucks, pallet stackers, order pickers and related material-handling equipment. Different mast positions can use bearings with similar basic dimensions but different outer-ring profiles, widths or load ratings, making the complete reference especially useful for replacement orders.
Representative Models for Distributor RFQs
| Model | Dimensions | Quotation Use |
|---|---|---|
| MG 305 DDB | 25 × 76.2 mm; B 25.4 mm | Representative MG 305 reference and useful suffix-comparison model. |
| MG 307 FFTC | 35 × 103 mm; B 25 mm | Representative model from the broad MG 307 family. |
| MG 308 FFK | 40 × 109.65 mm; B 32 mm | Useful medium-size reference with a wider outer ring. |
| MG 309 V5 | 45 × 127 mm; B 30 mm | Representative larger-bore mast guide bearing for distributor RFQs. |
Why Distributors Buy Mast Guide Bearings from TFL
TFL supports bearing distributors, forklift-parts wholesalers and industrial resellers that need multiple MG models, suffixes or other bearing types in the same order. Send one bearing list with part numbers and quantities, and add drawings, dimensions or forklift information where needed. The quotation can cover the proposed models, important specification differences, price, MOQ, lead time and packing requirements.
Mixed-model orders can be coordinated under one TFL order, with OEM, private-label or neutral packaging and consolidated shipment available according to the confirmed requirement. Model numbers, quantities, agreed dimensions, visible condition and packing are checked before shipment.
Send Your Mast Guide Bearing List
Send the part numbers and quantities to start your quote. If markings are missing, add photos, d × D × b × B dimensions, outer-ring profile or forklift information to help confirm the replacement.
TFL is an independent bearing supplier. Forklift brands and original part numbers are used only to identify replacement requirements. Final compatibility is confirmed from the relevant dimensions, outer-ring profile, load requirements and mounting conditions.
FREQUENTLY ASKED QUESTIONS
