Description
Size-specific context
Where JDLB 45 sits in the range
JDLB 45 is the most compact JDLB size in this group, useful when the existing machine leaves limited space around the worm-drive assembly. The dual-lead principle lets the assembled mesh be adjusted by moving the worm axially; it does not make the bare shaft interchangeable with another family size.
Because 45 is the smallest listed family size, confirm journal diameters, shoulder positions and coupling/end features carefully; a visually similar shaft from a larger family is not an interchangeable substitute.
JDLB 45 size and adjustment data
| Parameter | Specification / guidance |
|---|---|
| Series size | JDLB 45 |
| Drive concept | Dual-lead worm drive with axial backlash adjustment |
| Documented ratio contexts | 14.5, 19.5, 24.5*, 30, 40*, 45, 50*, 60, 90 |
| Lead-angle examples | 14°06′ at 14.5; 11°33′ at 19.5; 7°10′ at 30; 5°22′ at 45; 4°14′ at 60; 3°01′ at 90 |
| Adjustment distance V | 8 mm |
| Adjustment coefficient k | 0.015–0.04 mm⁻¹ |
| Clearance adjustment ΔSd | 0.12–0.32 mm |
| Input shaft diameter J | 15 mm |
| Envelope A / B / C | 108 / 135 / 53 mm |
| Drive-level P0 grade | 2 arc minutes |
| Drive-level P1 grade | 3–5 arc minutes |
| Documented output radial load Fr2 | 5500 N |
| Documented output axial load Fa2 | 3800 N |
| Material / heat treatment of replacement shaft | Confirm from ordered drawing or approved project specification |
Selected JDLB 45 performance references
| Ratio context | Documented performance reference |
|---|---|
| Ratio 14.5 | At n1=1400 min⁻¹: dynamic efficiency 0.80; rated input power 0.6 kW; output torque 52 Nm; output speed 96.6 min⁻¹. |
| Ratio 30 | At n1=1400 min⁻¹: dynamic efficiency 0.69; rated input power 0.4 kW; output torque 61 Nm; output speed 46.7 min⁻¹. |
| Ratio 90 | At n1=1400 min⁻¹: dynamic efficiency 0.48; rated input power 0.2 kW; output torque 56 Nm; output speed 15.6 min⁻¹. |
Adjustment data for JDLB 45
The documented adjustment range for size 45 uses V=8 mm, k=0.015–0.04 mm⁻¹ and ΔSd=0.12–0.32 mm. These values describe the reducer adjustment context and should not be converted into a standalone tooth tolerance on a replacement shaft.
Ratio, starts and replacement identification
The size-45 mesh table spans these documented ratio contexts: 14.5, 19.5, 24.5*, 30, 40*, 45, 50*, 60, 90. Worm start count and lead angle change with the selected ratio, so the reducer size alone is not enough to manufacture a replacement worm.
When the old shaft is worn, read the ratio plate or gearbox record and inspect the mating wheel before finalizing tooth geometry. For JDLB 45, also include the shaft end interfaces and bearing-journal dimensions in the same RFQ.
Replacement RFQ
What to send for a JDLB 45 quote
Send the size-45 reducer reference, ratio, quantity, current worm-shaft drawing or measured sample, and the mating-wheel condition. Mark any surfaces affected by wear so measured damage is not treated as intended geometry.
For JDLB 45, the order review should reflect that the most compact JDLB size in this group, useful when the existing machine leaves limited space around the worm-drive assembly. State the requested 2 arc minutes P0 or 3–5 arc minutes P1 drive grade as an assembled-mesh target and include the wheel condition plus the documented V=8 mm adjustment context.
Frequently asked questions
Is JDLB 45 the smallest size in this six-size range?
Yes. The documented principal size sequence begins at 45 and continues through 50, 55, 63, 75 and 90.
Can JDLB 45 be ordered from the size number alone?
No. The 45 family still contains different ratio/start/lead conditions. Send the ratio and current shaft or wheel data so the tooth relationship can be confirmed.
What if the JDLB 45 wheel is also worn?
Quote the size-45 worm and wheel together when wear or contact condition makes the original mesh uncertain. Pair-level review avoids treating a damaged mating member as a valid reference.
Replacement / service
Use JDLB 45 as a drive-family reference, then confirm the actual shaft
The JDLB 45 page carries documented series context for a dual-lead worm drive, including size-specific envelope, adjustment and selected drive-performance references already shown above. Those figures describe the drive family; they do not define every bearing journal, end feature or replacement shaft dimension.
On a JDLB 45 replacement, record the compact unit reference, current ratio and end/journal interfaces before removing the shaft. If backlash is the service complaint, inspect wheel condition and bearing support so a worn assembly is not reduced to a shaft-only quotation.
JDLB 45 order-release checklist
| Release item | Information to supply |
|---|---|
| Drive identity | JDLB 45 size reference plus ratio / model information. |
| Existing shaft | Drawing, sample, or trusted dimensions for journals, shoulders and input/end interfaces. |
| Mating wheel | Current wheel condition and identifying data; include it when tooth geometry or contact is uncertain. |
| Adjustment state | Current axial adjustment/reference position and the reason for replacement or backlash correction. |
| Duty | Input speed, load/torque context, reversals and lubrication condition. |
| Inspection | State whether the order needs dimensional records, material/treatment evidence or pair/assembly checks. |
Where the JDLB 45 shaft sits in a multi-unit drive context
If a size-45 unit is one station on a linked worm-shaft drive, show the neighboring coupling and center-distance arrangement. That context helps preserve the way the station is located and synchronized in the machine.
Quote from the real interfaces
Request a Quote / Send RFQ
Send the model or drawing reference, quantity, application and the geometry that controls fit and mesh. Unknown values can be identified for confirmation rather than guessed.
